diff --git a/sys/dev/scsipi/cd.c b/sys/dev/scsipi/cd.c
index 0f8cab34b476..85e14ccd8fc8 100644
--- a/sys/dev/scsipi/cd.c
+++ b/sys/dev/scsipi/cd.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: cd.c,v 1.83 1996/03/17 00:59:41 thorpej Exp $	*/
+/*	$NetBSD: cd.c,v 1.84 1996/03/19 03:05:15 mycroft Exp $	*/
 
 /*
  * Copyright (c) 1994, 1995 Charles M. Hannum.  All rights reserved.
@@ -553,9 +553,7 @@ cdstart(v)
 			bzero(&cmd_small, sizeof(cmd_small));
 			cmd_small.opcode = (bp->b_flags & B_READ) ?
 			    READ_COMMAND : WRITE_COMMAND;
-			cmd_small.addr_2 = (blkno >> 16) & 0x1f;
-			cmd_small.addr_1 = (blkno >> 8) & 0xff;
-			cmd_small.addr_0 = blkno & 0xff;
+			_lto3b(blkno, cmd_small.addr);
 			cmd_small.length = nblks & 0xff;
 			cmdlen = sizeof(cmd_small);
 			cmdp = (struct scsi_generic *)&cmd_small;
@@ -566,12 +564,8 @@ cdstart(v)
 			bzero(&cmd_big, sizeof(cmd_big));
 			cmd_big.opcode = (bp->b_flags & B_READ) ?
 			    READ_BIG : WRITE_BIG;
-			cmd_big.addr_3 = (blkno >> 24) & 0xff;
-			cmd_big.addr_2 = (blkno >> 16) & 0xff;
-			cmd_big.addr_1 = (blkno >> 8) & 0xff;
-			cmd_big.addr_0 = blkno & 0xff;
-			cmd_big.length2 = (nblks >> 8) & 0xff;
-			cmd_big.length1 = nblks & 0xff;
+			_lto4b(blkno, cmd_big.addr);
+			_lto2b(nblks, cmd_big.length);
 			cmdlen = sizeof(cmd_big);
 			cmdp = (struct scsi_generic *)&cmd_big;
 		}
@@ -734,9 +728,8 @@ cdioctl(dev, cmd, addr, flag, p)
 					   &data, len);
 		if (error)
 			return error;
-		len = min(len, ((data.header.data_len[0] << 8) +
-		    data.header.data_len[1] +
-		    sizeof(struct cd_sub_channel_header)));
+		len = min(len, _2btol(data.header.data_len) +
+		    sizeof(struct cd_sub_channel_header));
 		return copyout(&data, args->data, len);
 	}
 	case CDIOREADTOCHEADER: {
@@ -972,14 +965,12 @@ cd_size(cd, flags)
 	    2000, NULL, flags | SCSI_DATA_IN) != 0)
 		return 0;
 
-	blksize = (rdcap.length_3 << 24) + (rdcap.length_2 << 16) +
-	    (rdcap.length_1 << 8) + rdcap.length_0;
+	blksize = _4btol(rdcap.length);
 	if (blksize < 512)
 		blksize = 2048;	/* some drives lie ! */
 	cd->params.blksize = blksize;
 
-	size = (rdcap.addr_3 << 24) + (rdcap.addr_2 << 16) +
-	    (rdcap.addr_1 << 8) + rdcap.addr_0 + 1;
+	size = _4btol(rdcap.addr) + 1;
 	if (size < 100)
 		size = 400000;	/* ditto */
 	cd->params.disksize = size;
@@ -1040,12 +1031,8 @@ cd_play(cd, blkno, nblks)
 
 	bzero(&scsi_cmd, sizeof(scsi_cmd));
 	scsi_cmd.opcode = PLAY;
-	scsi_cmd.blk_addr[0] = (blkno >> 24) & 0xff;
-	scsi_cmd.blk_addr[1] = (blkno >> 16) & 0xff;
-	scsi_cmd.blk_addr[2] = (blkno >> 8) & 0xff;
-	scsi_cmd.blk_addr[3] = blkno & 0xff;
-	scsi_cmd.xfer_len[0] = (nblks >> 8) & 0xff;
-	scsi_cmd.xfer_len[1] = nblks & 0xff;
+	_lto4b(blkno, scsi_cmd.blk_addr);
+	_lto2b(nblks, scsi_cmd.xfer_len);
 	return scsi_scsi_cmd(cd->sc_link, (struct scsi_generic *)&scsi_cmd,
 	    sizeof(scsi_cmd), 0, 0, CDRETRIES, 200000, NULL, 0);
 }
@@ -1062,14 +1049,8 @@ cd_play_big(cd, blkno, nblks)
 
 	bzero(&scsi_cmd, sizeof(scsi_cmd));
 	scsi_cmd.opcode = PLAY_BIG;
-	scsi_cmd.blk_addr[0] = (blkno >> 24) & 0xff;
-	scsi_cmd.blk_addr[1] = (blkno >> 16) & 0xff;
-	scsi_cmd.blk_addr[2] = (blkno >> 8) & 0xff;
-	scsi_cmd.blk_addr[3] = blkno & 0xff;
-	scsi_cmd.xfer_len[0] = (nblks >> 24) & 0xff;
-	scsi_cmd.xfer_len[1] = (nblks >> 16) & 0xff;
-	scsi_cmd.xfer_len[2] = (nblks >> 8) & 0xff;
-	scsi_cmd.xfer_len[3] = nblks & 0xff;
+	_lto4b(blkno, scsi_cmd.blk_addr);
+	_lto4b(nblks, scsi_cmd.xfer_len);
 	return scsi_scsi_cmd(cd->sc_link, (struct scsi_generic *)&scsi_cmd,
 	    sizeof(scsi_cmd), 0, 0, CDRETRIES, 20000, NULL, 0);
 }
@@ -1163,8 +1144,7 @@ cd_read_subchannel(cd, mode, format, track, data, len)
 	scsi_cmd.byte3 = SRS_SUBQ;
 	scsi_cmd.subchan_format = format;
 	scsi_cmd.track = track;
-	scsi_cmd.data_len[0] = (len >> 8) & 0xff;
-	scsi_cmd.data_len[1] = len & 0xff;
+	_lto2b(len, scsi_cmd.data_len);
 	return scsi_scsi_cmd(cd->sc_link, (struct scsi_generic *)&scsi_cmd,
 	    sizeof(struct scsi_read_subchannel), (u_char *)data, len,
 	    CDRETRIES, 5000, NULL, SCSI_DATA_IN);
@@ -1191,8 +1171,7 @@ cd_read_toc(cd, mode, start, data, len)
 	if (mode == CD_MSF_FORMAT)
 		scsi_cmd.byte2 |= CD_MSF;
 	scsi_cmd.from_track = start;
-	scsi_cmd.data_len[0] = (ntoc >> 8) & 0xff;
-	scsi_cmd.data_len[1] = ntoc & 0xff;
+	_lto2b(ntoc, scsi_cmd.data_len);
 	return scsi_scsi_cmd(cd->sc_link, (struct scsi_generic *)&scsi_cmd,
 	    sizeof(struct scsi_read_toc), (u_char *)data, len, CDRETRIES,
 	    5000, NULL, SCSI_DATA_IN);
diff --git a/sys/dev/scsipi/ch.c b/sys/dev/scsipi/ch.c
index 125a4e918674..e1644af55edf 100644
--- a/sys/dev/scsipi/ch.c
+++ b/sys/dev/scsipi/ch.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: ch.c,v 1.17 1996/03/17 00:59:44 thorpej Exp $	*/
+/*	$NetBSD: ch.c,v 1.18 1996/03/19 03:05:15 mycroft Exp $	*/
 
 /*
  * Copyright (c) 1994 Charles Hannum.  All rights reserved.
@@ -312,8 +312,7 @@ ch_getelem(ch, stat, type, from, data, flags)
 	bzero(&scsi_cmd, sizeof(scsi_cmd));
 	scsi_cmd.opcode = READ_ELEMENT_STATUS;
 	scsi_cmd.byte2 = type;
-	scsi_cmd.starting_element_addr[0] = (from >> 8) & 0xff;
-	scsi_cmd.starting_element_addr[1] = from & 0xff;
+	_lto2b(from, scsi_cmd.starting_element_addr);
 	scsi_cmd.number_of_elements[1] = 1;
 	scsi_cmd.allocation_length[2] = 32;
 
@@ -339,12 +338,9 @@ ch_move(ch, stat, chm, from, to, flags)
 
 	bzero(&scsi_cmd, sizeof(scsi_cmd));
 	scsi_cmd.opcode = MOVE_MEDIUM;
-	scsi_cmd.transport_element_address[0] = (chm >> 8) & 0xff;
-	scsi_cmd.transport_element_address[1] = chm & 0xff;
-	scsi_cmd.source_address[0] = (from >> 8) & 0xff;
-	scsi_cmd.source_address[1] = from & 0xff;
-	scsi_cmd.destination_address[0] = (to >> 8) & 0xff;
-	scsi_cmd.destination_address[1] = to & 0xff;
+	_lto2b(chm, scsi_cmd.transport_element_address);
+	_lto2b(from, scsi_cmd.source_address);
+	_lto2b(to, scsi_cmd.destination_address);
 	scsi_cmd.invert = (chm & CH_INVERT) ? 1 : 0;
 	error = scsi_scsi_cmd(ch->sc_link, (struct scsi_generic *) &scsi_cmd,
 	    sizeof(scsi_cmd), NULL, 0, CHRETRIES, 100000, NULL, flags);
@@ -366,10 +362,8 @@ ch_position(ch, stat, chm, to, flags)
 
 	bzero(&scsi_cmd, sizeof(scsi_cmd));
 	scsi_cmd.opcode = POSITION_TO_ELEMENT;
-	scsi_cmd.transport_element_address[0] = (chm >> 8) & 0xff;
-	scsi_cmd.transport_element_address[1] = chm & 0xff;
-	scsi_cmd.source_address[0] = (to >> 8) & 0xff;
-	scsi_cmd.source_address[1] = to & 0xff;
+	_lto2b(chm, scsi_cmd.transport_element_address);
+	_lto2b(to, scsi_cmd.source_address);
 	scsi_cmd.invert = (chm & CH_INVERT) ? 1 : 0;
 	error = scsi_scsi_cmd(ch->sc_link, (struct scsi_generic *) &scsi_cmd,
 	    sizeof(scsi_cmd), NULL, 0, CHRETRIES, 100000, NULL, flags);
diff --git a/sys/dev/scsipi/scsi_all.h b/sys/dev/scsipi/scsi_all.h
index 646826c872b4..81eeb7d9bd52 100644
--- a/sys/dev/scsipi/scsi_all.h
+++ b/sys/dev/scsipi/scsi_all.h
@@ -1,4 +1,4 @@
-/*	$NetBSD: scsi_all.h,v 1.6 1994/12/28 19:42:54 mycroft Exp $	*/
+/*	$NetBSD: scsi_all.h,v 1.7 1996/03/19 03:05:15 mycroft Exp $	*/
 
 /*
  * SCSI general  interface description
@@ -229,58 +229,33 @@ struct scsi_inquiry_data {
 	u_int8_t extra[8];
 };
 
-/*
- * This looks bad, and it is.  However it fixes padding problems
- * caused by using unions.  This *needs* to be an array, if this code
- * is to work on any architecture.
- */
-struct	scsi_sense_data {
-/* 1*/	u_int8_t error_code;		/* same bits as new version */
-#define XXX_unextended_blockhi	extended_segment
-#define XXX_unextended_blockmed	extended_flags
-#define XXX_unextended_blocklow	extended_info[0]
-/* 2*/	u_int8_t extended_segment;
-/* 3*/	u_int8_t extended_flags;	/* same bits as new version */
-/* 7*/	u_int8_t extended_info[4];
-/* 8*/	u_int8_t extended_extra_len;
-	/*
-	 * allocate enough room to hold new stuff
-	 * (by increasing 16 to 24 below)
-	 */
-/*32*/	u_int8_t extended_extra_bytes[24];
-};	/* total of 32 bytes */
+struct scsi_sense_data_unextended {
+/* 1*/	u_int8_t error_code;
+/* 4*/	u_int8_t block[3];
+};
 
-struct	scsi_sense_data_new {
+struct scsi_sense_data {
 /* 1*/	u_int8_t error_code;
 #define	SSD_ERRCODE		0x7F
 #define	SSD_ERRCODE_VALID	0x80
-	union {
-		struct {	/* this is deprecated, the standard says "DON'T"*/
-/* 2*/			u_int8_t blockhi;
-/* 3*/			u_int8_t blockmed;
-/* 4*/			u_int8_t blocklow;
-		} unextended;
-		struct {
-/* 2*/			u_int8_t segment;
-/* 3*/			u_int8_t flags;
+/* 2*/	u_int8_t segment;
+/* 3*/	u_int8_t flags;
 #define	SSD_KEY		0x0F
 #define	SSD_ILI		0x20
 #define	SSD_EOM		0x40
 #define	SSD_FILEMARK	0x80
-/* 7*/			u_int8_t info[4];
-/* 8*/			u_int8_t extra_len;
-/*12*/			u_int8_t cmd_spec_info[4];
-/*13*/			u_int8_t add_sense_code;
-/*14*/			u_int8_t add_sense_code_qual;
-/*15*/			u_int8_t fru;
-/*16*/			u_int8_t sense_key_spec_1;
-#define	SSD_SCS_VALID		0x80
-/*17*/			u_int8_t sense_key_spec_2;
-/*18*/			u_int8_t sense_key_spec_3;
-/*32*/			u_int8_t extra_bytes[14];
-		} extended;
-	} ext;
-}; /* total of 32 bytes */
+/* 7*/	u_int8_t info[4];
+/* 8*/	u_int8_t extra_len;
+/*12*/	u_int8_t cmd_spec_info[4];
+/*13*/	u_int8_t add_sense_code;
+/*14*/	u_int8_t add_sense_code_qual;
+/*15*/	u_int8_t fru;
+/*16*/	u_int8_t sense_key_spec_1;
+#define	SSD_SCS_VALID	0x80
+/*17*/	u_int8_t sense_key_spec_2;
+/*18*/	u_int8_t sense_key_spec_3;
+/*32*/	u_int8_t extra_bytes[14];
+};
 
 struct scsi_blk_desc {
 	u_int8_t density;
diff --git a/sys/dev/scsipi/scsi_base.c b/sys/dev/scsipi/scsi_base.c
index b33da12ccb89..0b6ef6ef063e 100644
--- a/sys/dev/scsipi/scsi_base.c
+++ b/sys/dev/scsipi/scsi_base.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: scsi_base.c,v 1.33 1996/02/14 21:47:14 christos Exp $	*/
+/*	$NetBSD: scsi_base.c,v 1.34 1996/03/19 03:05:15 mycroft Exp $	*/
 
 /*
  * Copyright (c) 1994, 1995 Charles Hannum.  All rights reserved.
@@ -194,7 +194,6 @@ scsi_size(sc_link, flags)
 {
 	struct scsi_read_cap_data rdcap;
 	struct scsi_read_capacity scsi_cmd;
-	u_long size;
 
 	/*
 	 * make up a scsi command and ask the scsi driver to do
@@ -213,13 +212,9 @@ scsi_size(sc_link, flags)
 		sc_print_addr(sc_link);
 		printf("could not get size\n");
 		return 0;
-	} else {
-		size = rdcap.addr_0 + 1;
-		size += rdcap.addr_1 << 8;
-		size += rdcap.addr_2 << 16;
-		size += rdcap.addr_3 << 24;
 	}
-	return size;
+
+	return _4btol(rdcap.addr) + 1;
 }
 
 /*
@@ -625,20 +620,20 @@ scsi_interpret_sense(xs)
 		    sense->error_code & SSD_ERRCODE,
 		    sense->error_code & SSD_ERRCODE_VALID ? 1 : 0);
 		printf("seg%x key%x ili%x eom%x fmark%x\n",
-		    sense->extended_segment,
-		    sense->extended_flags & SSD_KEY,
-		    sense->extended_flags & SSD_ILI ? 1 : 0,
-		    sense->extended_flags & SSD_EOM ? 1 : 0,
-		    sense->extended_flags & SSD_FILEMARK ? 1 : 0);
+		    sense->segment,
+		    sense->flags & SSD_KEY,
+		    sense->flags & SSD_ILI ? 1 : 0,
+		    sense->flags & SSD_EOM ? 1 : 0,
+		    sense->flags & SSD_FILEMARK ? 1 : 0);
 		printf("info: %x %x %x %x followed by %d extra bytes\n",
-		    sense->extended_info[0],
-		    sense->extended_info[1],
-		    sense->extended_info[2],
-		    sense->extended_info[3],
-		    sense->extended_extra_len);
+		    sense->info[0],
+		    sense->info[1],
+		    sense->info[2],
+		    sense->info[3],
+		    sense->extra_len);
 		printf("extra: ");
-		for (count = 0; count < sense->extended_extra_len; count++)
-			printf("%x ", sense->extended_extra_bytes[count]);
+		for (count = 0; count < sense->extra_len; count++)
+			printf("%x ", sense->extra_bytes[count]);
 		printf("\n");
 	}
 #endif	/*SCSIDEBUG */
@@ -660,15 +655,14 @@ scsi_interpret_sense(xs)
 		 */
 	case 0x71:		/* delayed error */
 		sc_print_addr(sc_link);
-		key = sense->extended_flags & SSD_KEY;
+		key = sense->flags & SSD_KEY;
 		printf(" DELAYED ERROR, key = 0x%x\n", key);
 	case 0x70:
-		if ((sense->error_code & SSD_ERRCODE_VALID) != 0) {
-			bcopy(sense->extended_info, &info, sizeof info);
-			info = ntohl(info);
-		} else
+		if ((sense->error_code & SSD_ERRCODE_VALID) != 0)
+			info = _4btol(sense->info);
+		else
 			info = 0;
-		key = sense->extended_flags & SSD_KEY;
+		key = sense->flags & SSD_KEY;
 
 		switch (key) {
 		case 0x0:	/* NO SENSE */
@@ -744,11 +738,11 @@ scsi_interpret_sense(xs)
 					printf(", info = %d (decimal)", info);
 				}
 			}
-			if (sense->extended_extra_len != 0) {
+			if (sense->extra_len != 0) {
 				int n;
 				printf(", data =");
-				for (n = 0; n < sense->extended_extra_len; n++)
-					printf(" %02x", sense->extended_extra_bytes[n]);
+				for (n = 0; n < sense->extra_len; n++)
+					printf(" %02x", sense->extra_bytes[n]);
 			}
 			printf("\n");
 		}
@@ -762,10 +756,10 @@ scsi_interpret_sense(xs)
 		printf("error code %d",
 		    sense->error_code & SSD_ERRCODE);
 		if ((sense->error_code & SSD_ERRCODE_VALID) != 0) {
+			struct scsi_sense_data_unextended *usense =
+			    (struct scsi_sense_data_unextended *)sense;
 			printf(" at block no. %d (decimal)",
-			    (sense->XXX_unextended_blockhi << 16) +
-			    (sense->XXX_unextended_blockmed << 8) +
-			    (sense->XXX_unextended_blocklow));
+			    _3btol(usense->block));
 		}
 		printf("\n");
 		return EIO;
@@ -776,36 +770,6 @@ scsi_interpret_sense(xs)
  * Utility routines often used in SCSI stuff
  */
 
-/*
- * convert a physical address to 3 bytes, 
- * MSB at the lowest address,
- * LSB at the highest.
- */
-void
-lto3b(val, bytes)
-	u_int32_t val;
-	u_int8_t *bytes;
-{
-
-	*bytes++ = (val >> 16) & 0xff;
-	*bytes++ = (val >> 8) & 0xff;
-	*bytes = val & 0xff;
-}
-
-/*
- * The reverse of lto3b
- */
-u_int32_t
-_3btol(bytes)
-	u_int8_t *bytes;
-{
-	u_int32_t rc;
-
-	rc = (*bytes++ << 16);
-	rc += (*bytes++ << 8);
-	rc += *bytes;
-	return (rc);
-}
 
 /*
  * Print out the scsi_link structure's address info.
diff --git a/sys/dev/scsipi/scsi_cd.h b/sys/dev/scsipi/scsi_cd.h
index bbd15676e981..526ef5eaae7f 100644
--- a/sys/dev/scsipi/scsi_cd.h
+++ b/sys/dev/scsipi/scsi_cd.h
@@ -1,4 +1,4 @@
-/*	$NetBSD: scsi_cd.h,v 1.5 1994/12/28 19:42:58 mycroft Exp $	*/
+/*	$NetBSD: scsi_cd.h,v 1.6 1996/03/19 03:05:15 mycroft Exp $	*/
 
 /*
  * Written by Julian Elischer (julian@tfs.com)
@@ -31,117 +31,111 @@
 
 struct scsi_read_capacity_cd {
 	u_int8_t opcode;
-	u_char	byte2;
-	u_char	addr_3;	/* Most Significant */
-	u_char	addr_2;
-	u_char	addr_1;
-	u_char	addr_0;	/* Least Significant */
-	u_char	unused[3];
-	u_char	control;
+	u_int8_t byte2;
+	u_int8_t addr[4];
+	u_int8_t unused[3];
+	u_int8_t control;
 };
 
 struct scsi_pause {
-	u_char	opcode;
-	u_char	byte2;
-	u_char	unused[6];
-	u_char	resume;
-	u_char	control;
+	u_int8_t opcode;
+	u_int8_t byte2;
+	u_int8_t unused[6];
+	u_int8_t resume;
+	u_int8_t control;
 };
 #define	PA_PAUSE	1
 #define PA_RESUME	0
 
 struct scsi_play_msf {
-	u_char	opcode;
-	u_char	byte2;
-	u_char	unused;
-	u_char	start_m;
-	u_char	start_s;
-	u_char	start_f;
-	u_char	end_m;
-	u_char	end_s;
-	u_char	end_f;
-	u_char	control;
+	u_int8_t opcode;
+	u_int8_t byte2;
+	u_int8_t unused;
+	u_int8_t start_m;
+	u_int8_t start_s;
+	u_int8_t start_f;
+	u_int8_t end_m;
+	u_int8_t end_s;
+	u_int8_t end_f;
+	u_int8_t control;
 };
 
 struct scsi_play_track {
-	u_char	opcode;
-	u_char	byte2;
-	u_char	unused[2];
-	u_char	start_track;
-	u_char	start_index;
-	u_char	unused1;
-	u_char	end_track;
-	u_char	end_index;
-	u_char	control;
+	u_int8_t opcode;
+	u_int8_t byte2;
+	u_int8_t unused[2];
+	u_int8_t start_track;
+	u_int8_t start_index;
+	u_int8_t unused1;
+	u_int8_t end_track;
+	u_int8_t end_index;
+	u_int8_t control;
 };
 
 struct scsi_play {
-	u_char	opcode;
-	u_char	byte2;
-	u_char	blk_addr[4];
-	u_char	unused;
-	u_char	xfer_len[2];
-	u_char	control;
+	u_int8_t opcode;
+	u_int8_t byte2;
+	u_int8_t blk_addr[4];
+	u_int8_t unused;
+	u_int8_t xfer_len[2];
+	u_int8_t control;
 };
 
 struct scsi_play_big {
-	u_char	opcode;
-	u_char	byte2;	/* same as above */
-	u_char	blk_addr[4];
-	u_char	xfer_len[4];
-	u_char	unused;
-	u_char	control;
+	u_int8_t opcode;
+	u_int8_t byte2;	/* same as above */
+	u_int8_t blk_addr[4];
+	u_int8_t xfer_len[4];
+	u_int8_t unused;
+	u_int8_t control;
 };
 
 struct scsi_play_rel_big {
-	u_char	opcode;
-	u_char	byte2;	/* same as above */
-	u_char	blk_addr[4];
-	u_char	xfer_len[4];
-	u_char	track;
-	u_char	control;
+	u_int8_t opcode;
+	u_int8_t byte2;	/* same as above */
+	u_int8_t blk_addr[4];
+	u_int8_t xfer_len[4];
+	u_int8_t track;
+	u_int8_t control;
 };
 
 struct scsi_read_header {
-	u_char	opcode;
-	u_char	byte2;
-	u_char	blk_addr[4];
-	u_char	unused;
-	u_char	data_len[2];
-	u_char	control;
+	u_int8_t opcode;
+	u_int8_t byte2;
+	u_int8_t blk_addr[4];
+	u_int8_t unused;
+	u_int8_t data_len[2];
+	u_int8_t control;
 };
 
 struct scsi_read_subchannel {
-	u_char	opcode;
-	u_char	byte2;
-	u_char	byte3;
+	u_int8_t opcode;
+	u_int8_t byte2;
+	u_int8_t byte3;
 #define	SRS_SUBQ	0x40
-	u_char	subchan_format;
-	u_char	unused[2];
-	u_char	track;
-	u_char	data_len[2];
-	u_char	control;
+	u_int8_t subchan_format;
+	u_int8_t unused[2];
+	u_int8_t track;
+	u_int8_t data_len[2];
+	u_int8_t control;
 };
 
 struct scsi_read_toc {
-	u_char	opcode;
-	u_char	byte2;
-	u_char	unused[4];
-	u_char	from_track;
-	u_char	data_len[2];
-	u_char	control;
+	u_int8_t opcode;
+	u_int8_t byte2;
+	u_int8_t unused[4];
+	u_int8_t from_track;
+	u_int8_t data_len[2];
+	u_int8_t control;
 };
 ;
 
 struct scsi_read_cd_capacity {
-	u_char	opcode;
-	u_char	byte2;
-	u_char	addr_3;	/* Most Significant */
-	u_char	addr_2;
-	u_char	addr_1;
-	u_char	addr_0;	/* Least Significant */
-	u_char	unused[3];
-	u_char	control;
+	u_int8_t opcode;
+	u_int8_t byte2;
+	u_int8_t addr[4];
+	u_int8_t unused[3];
+	u_int8_t control;
 };
 
 /*
@@ -162,33 +156,27 @@ struct scsi_read_cd_capacity {
 
 
 struct scsi_read_cd_cap_data {
-	u_char	addr_3;	/* Most significant */
-	u_char	addr_2;
-	u_char	addr_1;
-	u_char	addr_0;	/* Least significant */
-	u_char	length_3;	/* Most significant */
-	u_char	length_2;
-	u_char	length_1;
-	u_char	length_0;	/* Least significant */
+	u_int8_t addr[4];
+	u_int8_t length[4];
 };
 
 union cd_pages {
 	struct audio_page {
-		u_char	page_code;
+		u_int8_t page_code;
 #define	CD_PAGE_CODE	0x3F
 #define	AUDIO_PAGE	0x0e
 #define	CD_PAGE_PS	0x80
-		u_char	param_len;
-		u_char	flags;
+		u_int8_t param_len;
+		u_int8_t flags;
 #define		CD_PA_SOTC	0x02
 #define		CD_PA_IMMED	0x04
-		u_char	unused[2];
-		u_char	format_lba;
+		u_int8_t unused[2];
+		u_int8_t format_lba;
 #define		CD_PA_FORMAT_LBA	0x0F
 #define		CD_PA_APR_VALID	0x80
-		u_char	lb_per_sec[2];
+		u_int8_t lb_per_sec[2];
 		struct	port_control {
-			u_char	channels;
+			u_int8_t channels;
 #define	CHANNEL 0x0F
 #define	CHANNEL_0 1
 #define	CHANNEL_1 2
@@ -196,7 +184,7 @@ union cd_pages {
 #define	CHANNEL_3 8
 #define	LEFT_CHANNEL	CHANNEL_0
 #define	RIGHT_CHANNEL	CHANNEL_1
-			u_char	volume;
+			u_int8_t volume;
 		} port[4];
 #define	LEFT_PORT	0
 #define	RIGHT_PORT	1
diff --git a/sys/dev/scsipi/scsi_changer.h b/sys/dev/scsipi/scsi_changer.h
index 5161ce8e1664..677237e6a046 100644
--- a/sys/dev/scsipi/scsi_changer.h
+++ b/sys/dev/scsipi/scsi_changer.h
@@ -1,4 +1,4 @@
-/*	$NetBSD: scsi_changer.h,v 1.5 1994/12/28 19:42:59 mycroft Exp $	*/
+/*	$NetBSD: scsi_changer.h,v 1.6 1996/03/19 03:05:15 mycroft Exp $	*/
 
 /*
  * SCSI changer interface description
@@ -28,16 +28,16 @@
  * SCSI command format
  */
 struct scsi_read_element_status {
-        u_char  opcode;
-	u_char	byte2;
+        u_int8_t opcode;
+	u_int8_t byte2;
 #define	SRES_ELEM_TYPE_CODE 	0x0F
 #define	SRES_ELEM_VOLTAG 	0x10
-	u_char	starting_element_addr[2];
-	u_char	number_of_elements[2];
-	u_char	resv1;
-	u_char	allocation_length[3];
-	u_char	resv2;
-	u_char	control;
+	u_int8_t starting_element_addr[2];
+	u_int8_t number_of_elements[2];
+	u_int8_t resv1;
+	u_int8_t allocation_length[3];
+	u_int8_t resv2;
+	u_int8_t control;
 };
 #define RE_ALL_ELEMENTS			0
 #define RE_MEDIUM_TRANSPORT_ELEMENT	1
@@ -46,24 +46,24 @@ struct scsi_read_element_status {
 #define RE_DATA_TRANSFER_ELEMENT	4
 
 struct scsi_move_medium {
-	u_char  opcode;
-	u_char	byte2;
-	u_char  transport_element_address[2];
-	u_char  source_address[2];
-	u_char  destination_address[2];
-	u_char  rsvd[2];
-	u_char  invert;
-	u_char	control;
+	u_int8_t opcode;
+	u_int8_t byte2;
+	u_int8_t transport_element_address[2];
+	u_int8_t source_address[2];
+	u_int8_t destination_address[2];
+	u_int8_t rsvd[2];
+	u_int8_t invert;
+	u_int8_t control;
 };
 
 struct scsi_position_to_element {
-	u_char  opcode;
-        u_char  byte2;
-	u_char  transport_element_address[2];
-	u_char  source_address[2];
-	u_char  rsvd[2];
-	u_char  invert;
-	u_char	control;
+	u_int8_t opcode;
+        u_int8_t byte2;
+	u_int8_t transport_element_address[2];
+	u_int8_t source_address[2];
+	u_int8_t rsvd[2];
+	u_int8_t invert;
+	u_int8_t control;
 };
 	
 /*
@@ -74,20 +74,20 @@ struct scsi_position_to_element {
 #define READ_ELEMENT_STATUS     0xb8
 
 struct scsi_element_status_data {
-	u_char	first_element_reported[2];
-	u_char	number_of_elements_reported[2];
-	u_char  rsvd;
-	u_char	byte_count_of_report[3];
+	u_int8_t first_element_reported[2];
+	u_int8_t number_of_elements_reported[2];
+	u_int8_t rsvd;
+	u_int8_t byte_count_of_report[3];
 };
 
 struct element_status_page {
-	u_char	element_type_code;
-	u_char	flags;
+	u_int8_t element_type_code;
+	u_int8_t flags;
 #define	ESP_AVOLTAG	0x40
 #define	ESP_PVOLTAG	0x80
-	u_char element_descriptor_length[2];
-	u_char rsvd;
-	u_char byte_count_of_descriptor_data[3];
+	u_int8_t element_descriptor_length[2];
+	u_int8_t rsvd;
+	u_int8_t byte_count_of_descriptor_data[3];
 };
 
 #endif /* _SCSI_SCSI_CHANGER_H */
diff --git a/sys/dev/scsipi/scsi_disk.h b/sys/dev/scsipi/scsi_disk.h
index 3b3e3350c886..fd09456a5cf3 100644
--- a/sys/dev/scsipi/scsi_disk.h
+++ b/sys/dev/scsipi/scsi_disk.h
@@ -1,4 +1,4 @@
-/*	$NetBSD: scsi_disk.h,v 1.8 1995/10/15 23:32:02 thorpej Exp $	*/
+/*	$NetBSD: scsi_disk.h,v 1.9 1996/03/19 03:05:15 mycroft Exp $	*/
 
 /*
  * SCSI interface description
@@ -57,56 +57,47 @@
 #define _SCSI_SCSI_DISK_H 1
 
 struct scsi_reassign_blocks {
-	u_char	opcode;
-	u_char	byte2;
-	u_char	unused[3];
-	u_char	control;
+	u_int8_t opcode;
+	u_int8_t byte2;
+	u_int8_t unused[3];
+	u_int8_t control;
 };
 
 struct scsi_rw {
-	u_char	opcode;
-	u_char	addr_2;		/* Most significant */
+	u_int8_t opcode;
+	u_int8_t addr[3];
 #define	SRW_TOPADDR	0x1F	/* only 5 bits here */
-	u_char	addr_1;
-	u_char	addr_0;		/* least significant */
-	u_char	length;
-	u_char	control;
+	u_int8_t length;
+	u_int8_t control;
 };
 
 struct scsi_rw_big {
-	u_char	opcode;
-	u_char	byte2;
+	u_int8_t opcode;
+	u_int8_t byte2;
 #define	SRWB_RELADDR	0x01
-	u_char	addr_3;		/* Most significant */
-	u_char	addr_2;
-	u_char	addr_1;
-	u_char	addr_0;		/* least significant */
-	u_char	reserved;
-	u_char	length2;
-	u_char	length1;
-	u_char	control;
+	u_int8_t addr[4];
+	u_int8_t reserved;
+	u_int8_t length[2];
+	u_int8_t control;
 };
 
 struct scsi_read_capacity {
-	u_char	opcode;
-	u_char	byte2;
-	u_char	addr_3;	/* Most Significant */
-	u_char	addr_2;
-	u_char	addr_1;
-	u_char	addr_0;	/* Least Significant */
-	u_char	unused[3];
-	u_char	control;
+	u_int8_t opcode;
+	u_int8_t byte2;
+	u_int8_t addr[4];
+	u_int8_t unused[3];
+	u_int8_t control;
 };
 
 struct scsi_start_stop {
-	u_char	opcode;
-	u_char	byte2;
-	u_char	unused[2];
-	u_char	how;
+	u_int8_t opcode;
+	u_int8_t byte2;
+	u_int8_t unused[2];
+	u_int8_t how;
 #define	SSS_STOP		0x00
 #define	SSS_START		0x01
 #define	SSS_LOEJ		0x02
-	u_char	control;
+	u_int8_t control;
 };
 
 
@@ -128,89 +119,60 @@ struct scsi_start_stop {
 
 
 struct scsi_read_cap_data {
-	u_char	addr_3;	/* Most significant */
-	u_char	addr_2;
-	u_char	addr_1;
-	u_char	addr_0;	/* Least significant */
-	u_char	length_3;	/* Most significant */
-	u_char	length_2;
-	u_char	length_1;
-	u_char	length_0;	/* Least significant */
+	u_int8_t addr[4];
+	u_int8_t length[4];
 };
 
 struct scsi_reassign_blocks_data {
-	u_char	reserved[2];
-	u_char	length_msb;
-	u_char	length_lsb;
+	u_int8_t reserved[2];
+	u_int8_t length[2];
 	struct {
-		u_char	dlbaddr_3;	/* defect logical block address (MSB) */
-		u_char	dlbaddr_2;
-		u_char	dlbaddr_1;
-		u_char	dlbaddr_0;	/* defect logical block address (LSB) */
+		u_int8_t dlbaddr[4];
 	} defect_descriptor[1];
 };
 
-union disk_pages { /* this is the structure copied from osf */
-	struct page_disk_format {
-	   u_char pg_code;	/* page code (should be 3)	      */
+union disk_pages {
 #define	DISK_PGCODE	0x3F	/* only 6 bits valid */
-	   u_char pg_length;	/* page length (should be 0x16)	      */
-	   u_char trk_z_1;	/* tracks per zone (MSB)	      */
-	   u_char trk_z_0;	/* tracks per zone (LSB)	      */
-	   u_char alt_sec_1;	/* alternate sectors per zone (MSB)   */
-	   u_char alt_sec_0;	/* alternate sectors per zone (LSB)   */
-	   u_char alt_trk_z_1;	/* alternate tracks per zone (MSB)    */
-	   u_char alt_trk_z_0;	/* alternate tracks per zone (LSB)    */
-	   u_char alt_trk_v_1;	/* alternate tracks per volume (MSB)  */
-	   u_char alt_trk_v_0;	/* alternate tracks per volume (LSB)  */
-	   u_char ph_sec_t_1;	/* physical sectors per track (MSB)   */
-	   u_char ph_sec_t_0;	/* physical sectors per track (LSB)   */
-	   u_char bytes_s_1;	/* bytes per sector (MSB)	      */
-	   u_char bytes_s_0;	/* bytes per sector (LSB)	      */
-	   u_char interleave_1;/* interleave (MSB)		      */
-	   u_char interleave_0;/* interleave (LSB)		      */
-	   u_char trk_skew_1;	/* track skew factor (MSB)	      */
-	   u_char trk_skew_0;	/* track skew factor (LSB)	      */
-	   u_char cyl_skew_1;	/* cylinder skew (MSB)		      */
-	   u_char cyl_skew_0;	/* cylinder skew (LSB)		      */
-	   u_char flags;	/* various */
-#define		DISK_FMT_SURF	0x10
-#define		DISK_FMT_RMB	0x20
-#define		DISK_FMT_HSEC	0x40
-#define		DISK_FMT_SSEC	0x80
-	   u_char reserved2;
-	   u_char reserved3;
+	struct page_disk_format {
+		u_int8_t pg_code;	/* page code (should be 3) */
+		u_int8_t pg_length;	/* page length (should be 0x16) */
+		u_int8_t trk_z[2];	/* tracks per zone */
+		u_int8_t alt_sec[2];	/* alternate sectors per zone */
+		u_int8_t alt_trk_z[2];	/* alternate tracks per zone */
+		u_int8_t alt_trk_v[2];	/* alternate tracks per volume */
+		u_int8_t ph_sec_t[2];	/* physical sectors per track */
+		u_int8_t bytes_s[2];	/* bytes per sector */
+		u_int8_t interleave[2];	/* interleave */
+		u_int8_t trk_skew[2];	/* track skew factor */
+		u_int8_t cyl_skew[2];	/* cylinder skew */
+		u_int8_t flags;		/* various */
+#define	DISK_FMT_SURF	0x10
+#define	DISK_FMT_RMB	0x20
+#define	DISK_FMT_HSEC	0x40
+#define	DISK_FMT_SSEC	0x80
+		u_int8_t reserved2;
+		u_int8_t reserved3;
 	} disk_format;
 	struct page_rigid_geometry {
-	   u_char pg_code;	/* page code (should be 4)	      */
-	   u_char pg_length;	/* page length (should be 0x16)	      */
-	   u_char ncyl_2;	/* number of cylinders (MSB)	      */
-	   u_char ncyl_1;	/* number of cylinders 		      */
-	   u_char ncyl_0;	/* number of cylinders (LSB)	      */
-	   u_char nheads;	/* number of heads 		      */
-	   u_char st_cyl_wp_2;	/* starting cyl., write precomp (MSB) */
-	   u_char st_cyl_wp_1;	/* starting cyl., write precomp	      */
-	   u_char st_cyl_wp_0;	/* starting cyl., write precomp (LSB) */
-	   u_char st_cyl_rwc_2;/* starting cyl., red. write cur (MSB)*/
-	   u_char st_cyl_rwc_1;/* starting cyl., red. write cur      */
-	   u_char st_cyl_rwc_0;/* starting cyl., red. write cur (LSB)*/
-	   u_char driv_step_1;	/* drive step rate (MSB)	      */
-	   u_char driv_step_0;	/* drive step rate (LSB)	      */
-	   u_char land_zone_2;	/* landing zone cylinder (MSB)	      */
-	   u_char land_zone_1;	/* landing zone cylinder 	      */
-	   u_char land_zone_0;	/* landing zone cylinder (LSB)	      */
-	   u_char sp_sync_ctl;	/* spindle synch control              */
+		u_int8_t pg_code;	/* page code (should be 4) */
+		u_int8_t pg_length;	/* page length (should be 0x16)	*/
+		u_int8_t ncyl[3];	/* number of cylinders */
+		u_int8_t nheads;	/* number of heads */
+		u_int8_t st_cyl_wp[3];	/* starting cyl., write precomp */
+		u_int8_t st_cyl_rwc[3];	/* starting cyl., red. write cur */
+		u_int8_t driv_step[2];	/* drive step rate */
+		u_int8_t land_zone[3];	/* landing zone cylinder */
+		u_int8_t sp_sync_ctl;	/* spindle synch control */
 #define SPINDLE_SYNCH_MASK	0x03	/* mask of valid bits */
 #define SPINDLE_SYNCH_NONE	0x00	/* synch disabled or not supported */
 #define SPINDLE_SYNCH_SLAVE	0x01	/* disk is a slave */
 #define SPINDLE_SYNCH_MASTER	0x02	/* disk is a master */
 #define SPINDLE_SYNCH_MCONTROL	0x03	/* disk is a master control */
-	   u_char rot_offset;	/* rotational offset (for spindle synch) */
-	   u_char reserved1;
-	   u_char rpm_1;	/* media rotation speed (MSB)         */
-	   u_char rpm_0;	/* media rotation speed (LSB)         */
-	   u_char reserved2;
-	   u_char reserved3;
+		u_int8_t rot_offset;	/* rotational offset (for spindle synch) */
+		u_int8_t reserved1;
+		u_int8_t rpm[2];	/* media rotation speed */
+		u_int8_t reserved2;
+		u_int8_t reserved3;
     	} rigid_geometry;
 };
 
diff --git a/sys/dev/scsipi/scsi_scanner.h b/sys/dev/scsipi/scsi_scanner.h
index 0db8028c2f69..7ea6985c44f0 100644
--- a/sys/dev/scsipi/scsi_scanner.h
+++ b/sys/dev/scsipi/scsi_scanner.h
@@ -47,62 +47,62 @@
 struct scsi_rw_scanner {
 #define	READ			0x08
 #define WRITE			0x0a
-	u_char	opcode;
-	u_char	byte2;
+	u_int8_t opcode;
+	u_int8_t byte2;
 #define	SRW_FIXED		0x01
-	u_char	len[3];
-	u_char	control;
+	u_int8_t len[3];
+	u_int8_t control;
 };
 
 struct scsi_start_stop {
-	u_char	opcode;
-	u_char	byte2;
-	u_char	unused[2];
-	u_char  how;
+	u_int8_t opcode;
+	u_int8_t byte2;
+	u_int8_t unused[2];
+	u_int8_t how;
 #define	SSS_STOP		0x00
 #define	SSS_START		0x01
 #define	SSS_LOEJ		0x02
-	u_char	control;
+	u_int8_t control;
 };
 
 struct scsi_set_window {
 #define SET_WINDOW		0x24 /* set params of image area and windows */
 #define GET_WINDOW		0x25
-	u_char	opcode;
-	u_char	byte2;
-	u_char	reserved[4];
-	u_char  len[3];
-	u_char	control;
+	u_int8_t opcode;
+	u_int8_t byte2;
+	u_int8_t reserved[4];
+	u_int8_t len[3];
+	u_int8_t control;
 };
 
 struct scsi_window_header {
-	u_char	reserved[6];
-	u_char  len[2];		    /* MSB-LSB */
+	u_int8_t reserved[6];
+	u_int8_t len[2];
 };
 
 struct scsi_window_data {
-	u_char	window_id;	    /* must be zero */
-	u_char	res1:7;
-	u_char	auto_bit:1;
-	u_char	x_res[2];
-	u_char	y_res[2];
-	u_char	x_org[4];
-	u_char	y_org[4];
-	u_char	width[4];
-	u_char	length[4];
-	u_char	brightness;
-	u_char	threshold;
-	u_char	contrast;
-	u_char	image_comp;	    /* image composition (data type) */
-	u_char	bits_per_pixel;
-	u_char	halftone_pattern[2];
-	u_char	rif:1;		    /* reverse image format (mono negative) */
-	u_char  res2:4;
-	u_char	pad_type:3;
-	u_char	bit_ordering[2];
-	u_char	compression_type;
-	u_char	compression_arg;
-	u_char	res3[6];
+	u_int8_t window_id;	    /* must be zero */
+	u_int8_t res1:7;
+	u_int8_t auto_bit:1;
+	u_int8_t x_res[2];
+	u_int8_t y_res[2];
+	u_int8_t x_org[4];
+	u_int8_t y_org[4];
+	u_int8_t width[4];
+	u_int8_t length[4];
+	u_int8_t brightness;
+	u_int8_t threshold;
+	u_int8_t contrast;
+	u_int8_t image_comp;	    /* image composition (data type) */
+	u_int8_t bits_per_pixel;
+	u_int8_t halftone_pattern[2];
+	u_int8_t rif:1;		    /* reverse image format (mono negative) */
+	u_int8_t res2:4;
+	u_int8_t pad_type:3;
+	u_int8_t bit_ordering[2];
+	u_int8_t compression_type;
+	u_int8_t compression_arg;
+	u_int8_t res3[6];
 };
 
 /* mustek scsi commands */
diff --git a/sys/dev/scsipi/scsi_tape.h b/sys/dev/scsipi/scsi_tape.h
index 654b02ac7ec1..eaaf276bc6c0 100644
--- a/sys/dev/scsipi/scsi_tape.h
+++ b/sys/dev/scsipi/scsi_tape.h
@@ -1,4 +1,4 @@
-/*	$NetBSD: scsi_tape.h,v 1.7 1996/01/11 03:36:34 thorpej Exp $	*/
+/*	$NetBSD: scsi_tape.h,v 1.8 1996/03/19 03:05:15 mycroft Exp $	*/
 
 /*
  * Copyright (c) 1994 Charles Hannum.  All rights reserved.
@@ -60,97 +60,93 @@
 #define	READ			0x08
 #define WRITE			0x0a
 struct scsi_rw_tape {
-	u_char	opcode;
-	u_char	byte2;
+	u_int8_t opcode;
+	u_int8_t byte2;
 #define	SRW_FIXED		0x01
-	u_char	len[3];
-	u_char	control;
+	u_int8_t len[3];
+	u_int8_t control;
 };
 
 #define	SPACE			0x11
 struct scsi_space {
-	u_char	opcode;
-	u_char	byte2;
+	u_int8_t opcode;
+	u_int8_t byte2;
 #define	SS_CODE			0x03
 #define SP_BLKS			0x00
 #define SP_FILEMARKS		0x01
 #define SP_SEQ_FILEMARKS	0x02
 #define	SP_EOM			0x03
-	u_char	number[3];
-	u_char	control;
+	u_int8_t number[3];
+	u_int8_t control;
 };
 
 #define	WRITE_FILEMARKS		0x10
 struct scsi_write_filemarks {
-	u_char	opcode;
-	u_char	byte2;
-	u_char	number[3];
-	u_char	control;
+	u_int8_t opcode;
+	u_int8_t byte2;
+	u_int8_t number[3];
+	u_int8_t control;
 };
 
 #define REWIND			0x01
 struct scsi_rewind {
-	u_char	opcode;
-	u_char	byte2;
+	u_int8_t opcode;
+	u_int8_t byte2;
 #define	SR_IMMED		0x01
-	u_char	unused[3];
-	u_char	control;
+	u_int8_t unused[3];
+	u_int8_t control;
 };
 
 #define LOAD			0x1b
 struct scsi_load {
-	u_char	opcode;
-	u_char	byte2;
+	u_int8_t opcode;
+	u_int8_t byte2;
 #define	SL_IMMED		0x01
-	u_char	unused[2];
-	u_char	how;
+	u_int8_t unused[2];
+	u_int8_t how;
 #define LD_UNLOAD		0x00
 #define LD_LOAD			0x01
 #define LD_RETENSION		0x02
-	u_char	control;
+	u_int8_t control;
 };
 
 #define	ERASE			0x19
 struct scsi_erase {
-	u_char	opcode;
-	u_char	byte2;
+	u_int8_t opcode;
+	u_int8_t byte2;
 #define	SE_LONG			0x01
 #define	SE_IMMED		0x02
-	u_char	unused[3];
-	u_char	control;
+	u_int8_t unused[3];
+	u_int8_t control;
 };
 
 #define	READ_BLOCK_LIMITS	0x05
 struct scsi_block_limits {
-	u_char	opcode;
-	u_char	byte2;
-	u_char	unused[3];
-	u_char	control;
+	u_int8_t opcode;
+	u_int8_t byte2;
+	u_int8_t unused[3];
+	u_int8_t control;
 };
 
 struct scsi_block_limits_data {
-	u_char	reserved;
-	u_char	max_length_2;	/* Most significant */
-	u_char	max_length_1;
-	u_char	max_length_0;	/* Least significant */
-	u_char	min_length_1;	/* Most significant */
-	u_char	min_length_0;	/* Least significant */
+	u_int8_t reserved;
+	u_int8_t max_length[3];	/* Most significant */
+	u_int8_t min_length[2];	/* Most significant */
 };
 
 /* See SCSI-II spec 9.3.3.1 */
 struct scsi_tape_dev_conf_page {
-	u_char	pagecode;	/* 0x10 */
-	u_char	pagelength;	/* 0x0e */
-	u_char	byte2;
+	u_int8_t pagecode;	/* 0x10 */
+	u_int8_t pagelength;	/* 0x0e */
+	u_int8_t byte2;
 #define	SMT_CAP			0x40	/* change active partition */
 #define	SMT_CAF			0x20	/* change active format */
 #define	SMT_AFMASK		0x1f	/* active format mask */
-	u_char	active_partition;
-	u_char	wb_full_ratio;
-	u_char	rb_empty_ratio;
-	u_char	wrdelay_time_1;		/* MSB */
-	u_char	wrdelay_time_0;		/* LSB */
-	u_char	byte8;
+	u_int8_t active_partition;
+	u_int8_t wb_full_ratio;
+	u_int8_t rb_empty_ratio;
+	u_int8_t wrdelay_time[2];
+	u_int8_t byte8;
 #define	SMT_DBR			0x80	/* data buffer recovery */
 #define	SMT_BIS			0x40	/* block identifiers supported */
 #define	SMT_RSMK		0x20	/* report setmarks */
@@ -158,18 +154,16 @@ struct scsi_tape_dev_conf_page {
 #define SMT_SOCF_MASK		0xc0	/* stop on consecutive formats */
 #define	SMT_RBO			0x20	/* recover buffer order */
 #define	SMT_REW			0x10	/* report early warning */
-	u_char	gap_size;
-	u_char	byte10;
+	u_int8_t gap_size;
+	u_int8_t byte10;
 #define	SMT_EODDEFINED		0xe0	/* EOD defined */
 #define	SMT_EEG			0x10	/* enable EOD generation */
 #define	SMT_SEW			0x80	/* synchronize at early warning */
-	u_char	ew_bufsize_2;		/* MSB */
-	u_char	ew_bufsize_1;		/* ... */
-	u_char	ew_bufsize_0;		/* LSB */
-	u_char	sel_comp_alg;
+	u_int8_t ew_bufsize[3];
+	u_int8_t sel_comp_alg;
 #define	SMT_COMP_NONE		0x00
 #define	SMT_COMP_DEFAULT	0x01
-	u_char	reserved;
+	u_int8_t reserved;
 };
 
 /* defines for the device specific byte in the mode select/sense header */
@@ -182,11 +176,11 @@ struct scsi_tape_dev_conf_page {
 
 /* A special for the CIPHER ST150S(old drive) */
 struct block_desc_cipher {
-	u_char	density;
-	u_char	nblocks[3];
-	u_char	reserved;
-	u_char	blklen[3];
-	u_char  other;
+	u_int8_t density;
+	u_int8_t nblocks[3];
+	u_int8_t reserved;
+	u_int8_t blklen[3];
+	u_int8_t other;
 #define ST150_SEC		0x01	/* soft error count */
 #define	SR150_AUI		0x02	/* autoload inhibit */
 };
diff --git a/sys/dev/scsipi/scsiconf.h b/sys/dev/scsipi/scsiconf.h
index efda1dde6bf1..dc94894f8bd1 100644
--- a/sys/dev/scsipi/scsiconf.h
+++ b/sys/dev/scsipi/scsiconf.h
@@ -1,4 +1,4 @@
-/*	$NetBSD: scsiconf.h,v 1.28 1996/02/18 20:32:45 mycroft Exp $	*/
+/*	$NetBSD: scsiconf.h,v 1.29 1996/03/19 03:05:15 mycroft Exp $	*/
 
 /*
  * Copyright (c) 1993, 1994, 1995 Charles Hannum.  All rights reserved.
@@ -288,8 +288,156 @@ void show_mem __P((u_char *, int));
 int scsi_probe_busses __P((int, int, int));
 void scsi_strvis __P((u_char *, u_char *, int));
 
+static __inline void _lto2b __P((u_int32_t val, u_int8_t *bytes));
+static __inline void _lto3b __P((u_int32_t val, u_int8_t *bytes));
+static __inline void _lto4b __P((u_int32_t val, u_int8_t *bytes));
+static __inline u_int32_t _2btol __P((u_int8_t *bytes));
+static __inline u_int32_t _3btol __P((u_int8_t *bytes));
+static __inline u_int32_t _4btol __P((u_int8_t *bytes));
 
-void lto3b __P((u_int32_t val, u_int8_t *bytes));
-u_int32_t _3btol __P((u_int8_t *bytes));
+static __inline void _lto2l __P((u_int32_t val, u_int8_t *bytes));
+static __inline void _lto3l __P((u_int32_t val, u_int8_t *bytes));
+static __inline void _lto4l __P((u_int32_t val, u_int8_t *bytes));
+static __inline u_int32_t _2ltol __P((u_int8_t *bytes));
+static __inline u_int32_t _3ltol __P((u_int8_t *bytes));
+static __inline u_int32_t _4ltol __P((u_int8_t *bytes));
+
+static __inline void
+_lto2b(val, bytes)
+	u_int32_t val;
+	u_int8_t *bytes;
+{
+
+	bytes[0] = (val >> 8) & 0xff;
+	bytes[1] = val & 0xff;
+}
+
+static __inline void
+_lto3b(val, bytes)
+	u_int32_t val;
+	u_int8_t *bytes;
+{
+
+	bytes[0] = (val >> 16) & 0xff;
+	bytes[1] = (val >> 8) & 0xff;
+	bytes[2] = val & 0xff;
+}
+
+static __inline void
+_lto4b(val, bytes)
+	u_int32_t val;
+	u_int8_t *bytes;
+{
+
+	bytes[0] = (val >> 24) & 0xff;
+	bytes[1] = (val >> 16) & 0xff;
+	bytes[2] = (val >> 8) & 0xff;
+	bytes[3] = val & 0xff;
+}
+
+static __inline u_int32_t
+_2btol(bytes)
+	u_int8_t *bytes;
+{
+	register u_int32_t rv;
+
+	rv = (bytes[0] << 8) |
+	     bytes[1];
+	return (rv);
+}
+
+static __inline u_int32_t
+_3btol(bytes)
+	u_int8_t *bytes;
+{
+	register u_int32_t rv;
+
+	rv = (bytes[0] << 16) |
+	     (bytes[1] << 8) |
+	     bytes[2];
+	return (rv);
+}
+
+static __inline u_int32_t
+_4btol(bytes)
+	u_int8_t *bytes;
+{
+	register u_int32_t rv;
+
+	rv = (bytes[0] << 24) |
+	     (bytes[1] << 16) |
+	     (bytes[2] << 8) |
+	     bytes[3];
+	return (rv);
+}
+
+static __inline void
+_lto2l(val, bytes)
+	u_int32_t val;
+	u_int8_t *bytes;
+{
+
+	bytes[0] = val & 0xff;
+	bytes[1] = (val >> 8) & 0xff;
+}
+
+static __inline void
+_lto3l(val, bytes)
+	u_int32_t val;
+	u_int8_t *bytes;
+{
+
+	bytes[0] = val & 0xff;
+	bytes[1] = (val >> 8) & 0xff;
+	bytes[2] = (val >> 16) & 0xff;
+}
+
+static __inline void
+_lto4l(val, bytes)
+	u_int32_t val;
+	u_int8_t *bytes;
+{
+
+	bytes[0] = val & 0xff;
+	bytes[1] = (val >> 8) & 0xff;
+	bytes[2] = (val >> 16) & 0xff;
+	bytes[3] = (val >> 24) & 0xff;
+}
+
+static __inline u_int32_t
+_2ltol(bytes)
+	u_int8_t *bytes;
+{
+	register u_int32_t rv;
+
+	rv = bytes[0] |
+	     (bytes[1] << 8);
+	return (rv);
+}
+
+static __inline u_int32_t
+_3ltol(bytes)
+	u_int8_t *bytes;
+{
+	register u_int32_t rv;
+
+	rv = bytes[0] |
+	     (bytes[1] << 8) |
+	     (bytes[2] << 16);
+	return (rv);
+}
+
+static __inline u_int32_t
+_4ltol(bytes)
+	u_int8_t *bytes;
+{
+	register u_int32_t rv;
+
+	rv = bytes[0] |
+	     (bytes[1] << 8) |
+	     (bytes[2] << 16) |
+	     (bytes[3] << 24);
+	return (rv);
+}
 
 #endif /* SCSI_SCSICONF_H */
diff --git a/sys/dev/scsipi/sd.c b/sys/dev/scsipi/sd.c
index 6125fd68a924..d22ff46cef73 100644
--- a/sys/dev/scsipi/sd.c
+++ b/sys/dev/scsipi/sd.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: sd.c,v 1.90 1996/03/17 02:06:50 pk Exp $	*/
+/*	$NetBSD: sd.c,v 1.91 1996/03/19 03:05:15 mycroft Exp $	*/
 
 /*
  * Copyright (c) 1994, 1995 Charles M. Hannum.  All rights reserved.
@@ -106,7 +106,6 @@ void	sdminphys __P((struct buf *));
 void	sdgetdisklabel __P((struct sd_softc *));
 void	sdstart __P((void *));
 int	sddone __P((struct scsi_xfer *, int));
-u_long	sd_size __P((struct sd_softc *, int));
 int	sd_reassign_blocks __P((struct sd_softc *, u_long));
 int	sd_get_parms __P((struct sd_softc *, int));
 
@@ -569,9 +568,7 @@ sdstart(v)
 			bzero(&cmd_small, sizeof(cmd_small));
 			cmd_small.opcode = (bp->b_flags & B_READ) ?
 			    READ_COMMAND : WRITE_COMMAND;
-			cmd_small.addr_2 = (blkno >> 16) & 0x1f;
-			cmd_small.addr_1 = (blkno >> 8) & 0xff;
-			cmd_small.addr_0 = blkno & 0xff;
+			_lto3b(blkno, cmd_small.addr);
 			cmd_small.length = nblks & 0xff;
 			cmdlen = sizeof(cmd_small);
 			cmdp = (struct scsi_generic *)&cmd_small;
@@ -582,12 +579,8 @@ sdstart(v)
 			bzero(&cmd_big, sizeof(cmd_big));
 			cmd_big.opcode = (bp->b_flags & B_READ) ?
 			    READ_BIG : WRITE_BIG;
-			cmd_big.addr_3 = (blkno >> 24) & 0xff;
-			cmd_big.addr_2 = (blkno >> 16) & 0xff;
-			cmd_big.addr_1 = (blkno >> 8) & 0xff;
-			cmd_big.addr_0 = blkno & 0xff;
-			cmd_big.length2 = (nblks >> 8) & 0xff;
-			cmd_big.length1 = nblks & 0xff;
+			_lto4b(blkno, cmd_big.addr);
+			_lto2b(nblks, cmd_big.length);
 			cmdlen = sizeof(cmd_big);
 			cmdp = (struct scsi_generic *)&cmd_big;
 		}
@@ -805,47 +798,13 @@ sdgetdisklabel(sd)
 	}
 }
 
-/*
- * Find out from the device what it's capacity is
- */
-u_long
-sd_size(sd, flags)
-	struct sd_softc *sd;
-	int flags;
-{
-	struct scsi_read_cap_data rdcap;
-	struct scsi_read_capacity scsi_cmd;
-	u_long size;
-
-	/*
-	 * make up a scsi command and ask the scsi driver to do
-	 * it for you.
-	 */
-	bzero(&scsi_cmd, sizeof(scsi_cmd));
-	scsi_cmd.opcode = READ_CAPACITY;
-
-	/*
-	 * If the command works, interpret the result as a 4 byte
-	 * number of blocks
-	 */
-	if (scsi_scsi_cmd(sd->sc_link, (struct scsi_generic *)&scsi_cmd,
-	    sizeof(scsi_cmd), (u_char *)&rdcap, sizeof(rdcap), SDRETRIES,
-	    2000, NULL, flags | SCSI_DATA_IN) != 0)
-		return 0;
-
-	size = (rdcap.addr_3 << 24) + (rdcap.addr_2 << 16) +
-	    (rdcap.addr_1 << 8) + rdcap.addr_0 + 1;
-
-	return size;
-}
-
 /*
  * Tell the device to map out a defective block
  */
 int
-sd_reassign_blocks(sd, block)
+sd_reassign_blocks(sd, blkno)
 	struct sd_softc *sd;
-	u_long block;
+	u_long blkno;
 {
 	struct scsi_reassign_blocks scsi_cmd;
 	struct scsi_reassign_blocks_data rbdata;
@@ -854,20 +813,14 @@ sd_reassign_blocks(sd, block)
 	bzero(&rbdata, sizeof(rbdata));
 	scsi_cmd.opcode = REASSIGN_BLOCKS;
 
-	rbdata.length_msb = 0;
-	rbdata.length_lsb = sizeof(rbdata.defect_descriptor[0]);
-	rbdata.defect_descriptor[0].dlbaddr_3 = (block >> 24) & 0xff;
-	rbdata.defect_descriptor[0].dlbaddr_2 = (block >> 16) & 0xff;
-	rbdata.defect_descriptor[0].dlbaddr_1 = (block >> 8) & 0xff;
-	rbdata.defect_descriptor[0].dlbaddr_0 = block & 0xff;
+	_lto2b(sizeof(rbdata.defect_descriptor[0]), rbdata.length);
+	_lto4b(blkno, rbdata.defect_descriptor[0].dlbaddr);
 
 	return scsi_scsi_cmd(sd->sc_link, (struct scsi_generic *)&scsi_cmd,
 	    sizeof(scsi_cmd), (u_char *)&rbdata, sizeof(rbdata), SDRETRIES,
 	    5000, NULL, SCSI_DATA_OUT);
 }
 
-#define b2tol(a)	(((unsigned)(a##_1) << 8) + (unsigned)a##_0 )
-
 /*
  * Get the scsi driver to send a full inquiry to the * device and use the
  * results to fill out the disk parameter structure.
@@ -908,7 +861,7 @@ sd_get_parms(sd, flags)
 		 * this depends on which controller (e.g. 1542C is
 		 * different. but we have to put SOMETHING here..)
 		 */
-		sectors = sd_size(sd, flags);
+		sectors = scsi_size(sd->sc_link, flags);
 		dp->heads = 64;
 		dp->sectors = 32;
 		dp->cyls = sectors / (64 * 32);
@@ -919,9 +872,9 @@ sd_get_parms(sd, flags)
 		    ("%d cyls, %d heads, %d precomp, %d red_write, %d land_zone\n",
 		    _3btol(&scsi_sense.pages.rigid_geometry.ncyl_2),
 		    scsi_sense.pages.rigid_geometry.nheads,
-		    b2tol(scsi_sense.pages.rigid_geometry.st_cyl_wp),
-		    b2tol(scsi_sense.pages.rigid_geometry.st_cyl_rwc),
-		    b2tol(scsi_sense.pages.rigid_geometry.land_zone)));
+		    _2btol(scsi_sense.pages.rigid_geometry.st_cyl_wp),
+		    _2btol(scsi_sense.pages.rigid_geometry.st_cyl_rwc),
+		    _2btol(scsi_sense.pages.rigid_geometry.land_zone)));
 
 		/*
 		 * KLUDGE!! (for zone recorded disks)
@@ -930,8 +883,7 @@ sd_get_parms(sd, flags)
 		 * can lead to wasted space! THINK ABOUT THIS !
 		 */
 		dp->heads = scsi_sense.pages.rigid_geometry.nheads;
-		dp->cyls =
-		    _3btol(&scsi_sense.pages.rigid_geometry.ncyl_2);
+		dp->cyls = _3btol(scsi_sense.pages.rigid_geometry.ncyl);
 		dp->blksize = _3btol(scsi_sense.blk_desc.blklen);
 
 		if (dp->heads == 0 || dp->cyls == 0) {
@@ -943,7 +895,7 @@ sd_get_parms(sd, flags)
 		if (dp->blksize == 0)
 			dp->blksize = 512;
 
-		sectors = sd_size(sd, flags);
+		sectors = scsi_size(sd->sc_link, flags);
 		dp->disksize = sectors;
 		sectors /= (dp->heads * dp->cyls);
 		dp->sectors = sectors;	/* XXX dubious on SCSI */
@@ -1047,12 +999,8 @@ sddump(dev, blkno, va, size)
 		 */
 		bzero(&cmd, sizeof(cmd));
 		cmd.opcode = WRITE_BIG;
-		cmd.addr_3 = (blkno >> 24) & 0xff;
-		cmd.addr_2 = (blkno >> 16) & 0xff;
-		cmd.addr_1 = (blkno >> 8) & 0xff;
-		cmd.addr_0 = blkno & 0xff;
-		cmd.length2 = (nwrt >> 8) & 0xff;
-		cmd.length1 = nwrt & 0xff;
+		_lto4b(blkno, cmd.addr);
+		_lto2b(nwrt, cmd.length);
 		/*
 		 * Fill out the scsi_xfer structure
 		 *    Note: we cannot sleep as we may be an interrupt
diff --git a/sys/dev/scsipi/ss_mustek.c b/sys/dev/scsipi/ss_mustek.c
index 7be6628fe01f..02249389039c 100644
--- a/sys/dev/scsipi/ss_mustek.c
+++ b/sys/dev/scsipi/ss_mustek.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: ss_mustek.c,v 1.1 1996/02/18 20:32:47 mycroft Exp $	*/
+/*	$NetBSD: ss_mustek.c,v 1.2 1996/03/19 03:05:15 mycroft Exp $	*/
 
 /*
  * Copyright (c) 1995 Joachim Koenig-Baltes.  All rights reserved.
@@ -277,9 +277,7 @@ mustek_trigger_scanner(ss)
 	struct mustek_set_window_data window_data;
 	struct mustek_start_scan_cmd start_scan_cmd;
 	struct scsi_link *sc_link = ss->sc_link;
-#ifndef MUSTEK_INCH_SPEC
 	int pixel_tlx, pixel_tly, pixel_brx, pixel_bry, paperlength;
-#endif
 	int error;
 
 	mustek_compute_sizes(ss);
@@ -294,46 +292,29 @@ mustek_trigger_scanner(ss)
 	window_cmd.length = sizeof(window_data);
 
 	bzero(&window_data, sizeof(window_data));
-	window_data.frame_header = MUSTEK_LINEART_BACKGROUND | MUSTEK_UNIT_SPEC;
+	window_data.frame.header = MUSTEK_LINEART_BACKGROUND | MUSTEK_UNIT_SPEC;
 #ifdef MUSTEK_INCH_SPEC
 	/* the positional values are all 1 byte because 256 / 8 = 32" */
-	window_data.frame_tl_x_0 = ss->sio.scan_x_origin / 150;
-	window_data.frame_tl_x_1 = 0;
-	window_data.frame_tl_y_0 = ss->sio.scan_y_origin / 150;
-	window_data.frame_tl_y_1 = 0;
-	window_data.frame_br_x_0 = (ss->sio.scan_x_origin +
-				    ss->sio.scan_width) / 150;
-	window_data.frame_br_x_1 = 0;
-	window_data.frame_br_y_0 = (ss->sio.scan_y_origin +
-				    ss->sio.scan_height) / 150;
-	window_data.frame_br_y_1 = 0;
+	pixel_tlx = ss->sio.scan_x_origin / 150;
+	pixel_tly = ss->sio.scan_y_origin / 150;
+	pixel_brx = pixel_tlx + ss->sio.scan_width / 150;
+	pixel_bry = pixel_tly + ss->sio.scan_height / 150;
 #else
 	pixel_tlx = (ss->sio.scan_x_origin * ss->sio.scan_x_resolution) / 1200;
-	window_data.frame_tl_x_0 = pixel_tlx & 0xff;
-	window_data.frame_tl_x_1 = (pixel_tlx >> 8) & 0xff;
 	pixel_tly = (ss->sio.scan_y_origin * ss->sio.scan_y_resolution) / 1200;
-	window_data.frame_tl_y_0 = pixel_tly & 0xff;
-	window_data.frame_tl_y_1 = (pixel_tly >> 8) & 0xff;
 	pixel_brx = pixel_tlx +
 	    (ss->sio.scan_width * ss->sio.scan_x_resolution) / 1200;
-	window_data.frame_br_x_0 = pixel_brx & 0xff;
-	window_data.frame_br_x_1 = (pixel_brx >> 8) & 0xff;
 	pixel_bry = pixel_tly +
 	    (ss->sio.scan_height * ss->sio.scan_y_resolution) / 1200;
-	window_data.frame_br_y_0 = pixel_bry & 0xff;
-	window_data.frame_br_y_1 = (pixel_bry >> 8) & 0xff;
 #endif
+	_lto2l(pixel_tlx, window_data.frame.tl_x);
+	_lto2l(pixel_tly, window_data.frame.tl_y);
+	_lto2l(pixel_brx, window_data.frame.br_x);
+	_lto2l(pixel_bry, window_data.frame.br_y);
 
 #if MUSTEK_WINDOWS >= 1
-	window_data.window1_header = MUSTEK_WINDOW_MASK | MUSTEK_UNIT_SPEC;
-	window_data.window1_tl_x_0 = window_data.frame_tl_x_0;
-	window_data.window1_tl_x_1 = window_data.frame_tl_x_1;
-	window_data.window1_tl_y_0 = window_data.frame_tl_y_0;
-	window_data.window1_tl_y_1 = window_data.frame_tl_y_1;
-	window_data.window1_br_x_0 = window_data.frame_br_x_0;
-	window_data.window1_br_x_1 = window_data.frame_br_x_1;
-	window_data.window1_br_y_0 = window_data.frame_br_y_0;
-	window_data.window1_br_y_1 = window_data.frame_br_y_1;
+	window_data.window1 = window_data.frame;
+	window_data.window1.header = MUSTEK_WINDOW_MASK | MUSTEK_UNIT_SPEC;
 #endif
 
 	/* send the set window command to the scanner */
@@ -349,7 +330,7 @@ mustek_trigger_scanner(ss)
 	 */
 	bzero(&mode_cmd, sizeof(mode_cmd));
 	mode_cmd.opcode = MUSTEK_MODE_SELECT;
-	mode_cmd.length_0 = sizeof(mode_data);
+	_lto2b(sizeof(mode_data), mode_cmd.length);
 
 	bzero(&mode_data, sizeof(mode_data));
 	mode_data.mode =
@@ -369,13 +350,11 @@ mustek_trigger_scanner(ss)
 	mode_data.grain = 0;
 	mode_data.velocity = ss->sio.scan_quality / 20 - 1;
 #ifdef MUSTEK_INCH_SPEC
-	mode_data.paperlength_0 = 14 * 8;	/* 14" */
-	mode_data.paperlength_1 = 0;
+	paperlength = 14 * 8;	/* 14" */
 #else
-	paperlength = 14 * ss->sio.scan_y_resolution; /* 14" */
-	mode_data.paperlength_0 = paperlength & 0xff;
-	mode_data.paperlength_1 = (paperlength >> 8) & 0xff;
+	paperlength = 14 * ss->sio.scan_y_resolution;	/* 14" */
 #endif
+	_lto2l(paperlength, mode_data.paperlength);
 
 	SC_DEBUG(sc_link, SDEV_DB1, ("mustek_trigger_scanner: mode_select\n"));
 	/* send the command to the scanner */
@@ -492,9 +471,7 @@ mustek_read(ss, bp)
 	    ((ss->sio.scan_pixels_per_line * ss->sio.scan_bits_per_pixel) / 8);
 	SC_DEBUG(sc_link, SDEV_DB1, ("mustek_read: read %d lines\n",
 	    lines_to_read));
-	cmd.length_0 = lines_to_read & 0xff;
-	cmd.length_1 = (lines_to_read >> 8) & 0xff;
-	cmd.length_2 = (lines_to_read >> 16) & 0xff;
+	_lto3b(lines_to_read, cmd.length);
 
 	/*
 	 * go ask the adapter to do all this for us
@@ -547,13 +524,8 @@ mustek_get_status(ss, timeout, update)
 	}
 
 	if (update) {
-		bytes_per_line =
-		    (data.bytes_per_line_1 << 8) |
-		    data.bytes_per_line_0;
-		lines =
-		    (data.lines_2 << 16) |
-		    (data.lines_1 << 8) |
-		    data.lines_0;
+		bytes_per_line = _2ltol(data.bytes_per_line);
+		lines = _3ltol(data.lines);
 		if (lines != ss->sio.scan_lines) {
 			printf("mustek: lines actual(%d) != computed(%d)\n",
 			    lines, ss->sio.scan_lines);
diff --git a/sys/dev/scsipi/ss_mustek.h b/sys/dev/scsipi/ss_mustek.h
index c045675077bd..599f129a06f2 100644
--- a/sys/dev/scsipi/ss_mustek.h
+++ b/sys/dev/scsipi/ss_mustek.h
@@ -1,4 +1,4 @@
-/*	$NetBSD: ss_mustek.h,v 1.1 1996/02/18 20:32:48 mycroft Exp $	*/
+/*	$NetBSD: ss_mustek.h,v 1.2 1996/03/19 03:05:15 mycroft Exp $	*/
 
 /*
  * Copyright (c) 1995 Joachim Koenig-Baltes.  All rights reserved.
@@ -70,104 +70,66 @@
  */
 
 struct mustek_set_window_cmd {
-	u_char	opcode;			/* 0x04 */
-	u_char	reserved[3];
-	u_char	length;			/* in bytes */
-	u_char	control;
+	u_int8_t opcode;		/* 0x04 */
+	u_int8_t reserved[3];
+	u_int8_t length;		/* in bytes */
+	u_int8_t control;
+};
+
+struct mustek_window {
+	u_int8_t header;		/* unit-defines also apply */
+	u_int8_t tl_x[2];		/* LSB */
+	u_int8_t tl_y[2];
+	u_int8_t br_x[2];
+	u_int8_t br_y[2];
 };
 
 struct mustek_set_window_data {
 #define MUSTEK_LINEART_BACKGROUND	0x00
 #define MUSTEK_HALFTONE_BACKGROUND	0x01
-	u_char	frame_header;		/* unit-defines also apply */
-	u_char	frame_tl_x_0;
-	u_char	frame_tl_x_1;
-	u_char	frame_tl_y_0;
-	u_char	frame_tl_y_1;
-	u_char	frame_br_x_0;
-	u_char	frame_br_x_1;
-	u_char	frame_br_y_0;
-	u_char	frame_br_y_1;
+	struct	mustek_window frame;
 #if MUSTEK_WINDOWS >= 1
 #define MUSTEK_WINDOW_MASK	0x80
-	u_char	window1_header;		/* unit-defines also apply */
-	u_char	window1_tl_x_0;
-	u_char	window1_tl_x_1;
-	u_char	window1_tl_y_0;
-	u_char	window1_tl_y_1;
-	u_char	window1_br_x_0;
-	u_char	window1_br_x_1;
-	u_char	window1_br_y_0;
-	u_char	window1_br_y_1;
+	struct	mustek_window window1;
 #endif
 #if MUSTEK_WINDOWS >= 2
-	u_char	window2_header;
-	u_char	window2_tl_x_0;
-	u_char	window2_tl_x_1;
-	u_char	window2_tl_y_0;
-	u_char	window2_tl_y_1;
-	u_char	window2_br_x_0;
-	u_char	window2_br_x_1;
-	u_char	window2_br_y_0;
-	u_char	window2_br_y_1;
+	struct	mustek_window window2;
 #endif
 #if MUSTEK_WINDOWS >= 3
-	u_char	window3_header;
-	u_char	window3_tl_x_0;
-	u_char	window3_tl_x_1;
-	u_char	window3_tl_y_0;
-	u_char	window3_tl_y_1;
-	u_char	window3_br_x_0;
-	u_char	window3_br_x_1;
-	u_char	window3_br_y_0;
-	u_char	window3_br_y_1;
+	struct	mustek_window window3;
 #endif
-#if MUSTEK_WINDOWS == 4
-	u_char	window4_header;
-	u_char	window4_tl_x_0;
-	u_char	window4_tl_x_1;
-	u_char	window4_tl_y_0;
-	u_char	window4_tl_y_1;
-	u_char	window4_br_x_0;
-	u_char	window4_br_x_1;
-	u_char	window4_br_y_0;
-	u_char	window4_br_y_1;
+#if MUSTEK_WINDOWS >= 4
+	struct	mustek_window window4;
 #endif
 };
 
 struct mustek_read_cmd {
-	u_char	opcode;			/* 0x08 */
-	u_char	reserved;
-	u_char	length_2;		/* number of LINES to be read (MSB) */
-	u_char	length_1;		/* number of LINES to be read */
-	u_char	length_0;		/* number of LINES to be read (LSB) */
-	u_char	control;
+	u_int8_t opcode;		/* 0x08 */
+	u_int8_t reserved;
+	u_int8_t length[3];
+	u_int8_t control;
 };
 
 struct mustek_get_status_cmd {
-	u_char	opcode;			/* 0x0f */
-	u_char	reserved[3];
-	u_char	length;			/* 0x06 */
-	u_char	control;
+	u_int8_t opcode;		/* 0x0f */
+	u_int8_t reserved[3];
+	u_int8_t length;		/* 0x06 */
+	u_int8_t control;
 };
 
 struct mustek_get_status_data {
 #define MUSTEK_READY 0
 #define MUSTEK_BUSY  -1	
-	u_char	ready_busy;		/* 0 = ready */
-	u_char	bytes_per_line_0;	/* LSB */
-	u_char	bytes_per_line_1;	/* MSB */
-	u_char	lines_0;		/* LSB */
-	u_char	lines_1;
-	u_char	lines_2;		/* MSB */
+	u_int8_t ready_busy;		/* 0 = ready */
+	u_int8_t bytes_per_line[2];	/* LSB */
+	u_int8_t lines[3];		/* LSB */
 };
 
 struct mustek_mode_select_cmd {
-	u_char	opcode;			/* 0x15 */
-	u_char	reserved[2];
-	u_char	length_1;		/* MSB */
-	u_char	length_0;		/* LSB */
-	u_char	control;
+	u_int8_t opcode;		/* 0x15 */
+	u_int8_t reserved[2];
+	u_int8_t length[2];
+	u_int8_t control;
 };
 
 /*
@@ -187,20 +149,19 @@ struct mustek_mode_select_data {
 #define MUSTEK_MODE_MASK		0x83
 #define MUSTEK_HT_PATTERN_BUILTIN	0x00
 #define MUSTEK_HT_PATTERN_DOWNLOADED	0x10
-	u_char	mode;
-	u_char	resolution;
-	u_char	brightness;
-	u_char	contrast;
-	u_char	grain;			/* 0 = 8x8, .....  5 = 2x2  */
-	u_char	velocity;		/* 0 = fast, ...., 4 = slow */
-	u_char	reserved[2];
-	u_char	paperlength_0;		/* LSB */
-	u_char	paperlength_1;		/* MSB */
+	u_int8_t mode;
+	u_int8_t resolution;
+	u_int8_t brightness;
+	u_int8_t contrast;
+	u_int8_t grain;			/* 0 = 8x8, .....  5 = 2x2  */
+	u_int8_t velocity;		/* 0 = fast, ...., 4 = slow */
+	u_int8_t reserved[2];
+	u_int8_t paperlength[2];	/* LSB */
 };
 
 struct mustek_start_scan_cmd {
-	u_char	opcode;			/* 0x1b */
-	u_char	reserved[3];
+	u_int8_t opcode;		/* 0x1b */
+	u_int8_t reserved[3];
 #define MUSTEK_SCAN_STOP	0x00
 #define MUSTEK_SCAN_START	0x01
 #define MUSTEK_GRAY_FILTER	0x00
@@ -211,8 +172,8 @@ struct mustek_start_scan_cmd {
 #define MUSTEK_BIT_MODE		0x00
 #define MUSTEK_RES_STEP_1	0x00
 #define MUSTEK_RES_STEP_10	0x80
-	u_char	mode;
-	u_char	control;
+	u_int8_t mode;
+	u_int8_t control;
 };
 
 #endif /* _SS_MUSTEK_H_ */
diff --git a/sys/dev/scsipi/ss_scanjet.c b/sys/dev/scsipi/ss_scanjet.c
index 4faebc78a75c..5e2fdd689a5c 100644
--- a/sys/dev/scsipi/ss_scanjet.c
+++ b/sys/dev/scsipi/ss_scanjet.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: ss_scanjet.c,v 1.1 1996/02/18 20:32:49 mycroft Exp $	*/
+/*	$NetBSD: ss_scanjet.c,v 1.2 1996/03/19 03:05:15 mycroft Exp $	*/
 
 /*
  * Copyright (c) 1995 Kenneth Stailey.  All rights reserved.
@@ -240,7 +240,7 @@ scanjet_read(ss, bp)
 	 * Handle "fixed-block-mode" tape drives by using the
 	 * block count instead of the length.
 	 */
-	lto3b(bp->b_bcount, cmd.len);
+	_lto3b(bp->b_bcount, cmd.len);
 
 	/*
 	 * go ask the adapter to do all this for us
@@ -278,7 +278,7 @@ scanjet_write(ss, buf, size, flags)
 		return (0);
 	bzero(&cmd, sizeof(cmd));
 	cmd.opcode = WRITE;
-	lto3b(size, cmd.len);
+	_lto3b(size, cmd.len);
 	return (scsi_scsi_cmd(ss->sc_link, (struct scsi_generic *) &cmd,
 	    sizeof(cmd), (u_char *) buf, size, 0, 100000, NULL,
 	    flags | SCSI_DATA_OUT));
diff --git a/sys/dev/scsipi/st.c b/sys/dev/scsipi/st.c
index 91e53ae1e67a..1982985952bd 100644
--- a/sys/dev/scsipi/st.c
+++ b/sys/dev/scsipi/st.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: st.c,v 1.63 1996/03/17 00:59:54 thorpej Exp $	*/
+/*	$NetBSD: st.c,v 1.64 1996/03/19 03:05:15 mycroft Exp $	*/
 
 /*
  * Copyright (c) 1994 Charles Hannum.  All rights reserved.
@@ -1005,9 +1005,9 @@ ststart(v)
 		 */
 		if (st->flags & ST_FIXEDBLOCKS) {
 			cmd.byte2 |= SRW_FIXED;
-			lto3b(bp->b_bcount / st->blksize, cmd.len);
+			_lto3b(bp->b_bcount / st->blksize, cmd.len);
 		} else
-			lto3b(bp->b_bcount, cmd.len);
+			_lto3b(bp->b_bcount, cmd.len);
 
 		/*
 		 * go ask the adapter to do all this for us
@@ -1254,21 +1254,15 @@ st_read(st, buf, size, flags)
 	cmd.opcode = READ;
 	if (st->flags & ST_FIXEDBLOCKS) {
 		cmd.byte2 |= SRW_FIXED;
-		lto3b(size / (st->blksize ? st->blksize : DEF_FIXED_BSIZE),
+		_lto3b(size / (st->blksize ? st->blksize : DEF_FIXED_BSIZE),
 		    cmd.len);
 	} else
-		lto3b(size, cmd.len);
+		_lto3b(size, cmd.len);
 	return scsi_scsi_cmd(st->sc_link, (struct scsi_generic *) &cmd,
 	    sizeof(cmd), (u_char *) buf, size, 0, 100000, NULL,
 	    flags | SCSI_DATA_IN);
 }
 
-#ifdef	__STDC__
-#define b2tol(a)	(((unsigned)(a##_1) << 8) + (unsigned)a##_0)
-#else
-#define b2tol(a)	(((unsigned)(a/**/_1) << 8) + (unsigned)a/**/_0)
-#endif
-
 /*
  * Ask the drive what it's min and max blk sizes are.
  */
@@ -1304,8 +1298,8 @@ st_read_block_limits(st, flags)
 	if (error)
 		return error;
 
-	st->blkmin = b2tol(block_limits.min_length);
-	st->blkmax = _3btol(&block_limits.max_length_2);
+	st->blkmin = _2btol(block_limits.min_length);
+	st->blkmax = _3btol(block_limits.max_length);
 
 	SC_DEBUG(sc_link, SDEV_DB3,
 	    ("(%d <= blksize <= %d)\n", st->blkmin, st->blkmax));
@@ -1413,7 +1407,7 @@ st_mode_select(st, flags)
 	else
 		scsi_select.header.dev_spec |= SMH_DSP_BUFF_MODE_ON;
 	if (st->flags & ST_FIXEDBLOCKS)
-		lto3b(st->blksize, scsi_select.blk_desc.blklen);
+		_lto3b(st->blksize, scsi_select.blk_desc.blklen);
 	if (st->page_0_size)
 		bcopy(st->sense_data, scsi_select.sense_data, st->page_0_size);
 
@@ -1531,7 +1525,7 @@ st_space(st, number, what, flags)
 	bzero(&cmd, sizeof(cmd));
 	cmd.opcode = SPACE;
 	cmd.byte2 = what;
-	lto3b(number, cmd.number);
+	_lto3b(number, cmd.number);
 
 	return scsi_scsi_cmd(st->sc_link, (struct scsi_generic *) &cmd,
 	    sizeof(cmd), 0, 0, 0, 900000, NULL, flags);
@@ -1570,7 +1564,7 @@ st_write_filemarks(st, number, flags)
 
 	bzero(&cmd, sizeof(cmd));
 	cmd.opcode = WRITE_FILEMARKS;
-	lto3b(number, cmd.number);
+	_lto3b(number, cmd.number);
 
 	return scsi_scsi_cmd(st->sc_link, (struct scsi_generic *) &cmd,
 	    sizeof(cmd), 0, 0, 0, 100000, NULL, flags);
@@ -1686,26 +1680,25 @@ st_interpret_sense(xs)
 	/*
 	 * Get the sense fields and work out what code
 	 */
-	if (sense->error_code & SSD_ERRCODE_VALID) {
-		bcopy(sense->extended_info, &info, sizeof info);
-		info = ntohl(info);
-	} else
+	if (sense->error_code & SSD_ERRCODE_VALID)
+		info = _4btol(sense->info);
+	else
 		info = xs->datalen;	/* bad choice if fixed blocks */
 	if ((sense->error_code & SSD_ERRCODE) != 0x70)
 		return -1;	/* let the generic code handle it */
 	if (st->flags & ST_FIXEDBLOCKS) {
 		xs->resid = info * st->blksize;
-		if (sense->extended_flags & SSD_EOM) {
+		if (sense->flags & SSD_EOM) {
 			st->flags |= ST_EIO_PENDING;
 			if (bp)
 				bp->b_resid = xs->resid;
 		}
-		if (sense->extended_flags & SSD_FILEMARK) {
+		if (sense->flags & SSD_FILEMARK) {
 			st->flags |= ST_AT_FILEMARK;
 			if (bp)
 				bp->b_resid = xs->resid;
 		}
-		if (sense->extended_flags & SSD_ILI) {
+		if (sense->flags & SSD_ILI) {
 			st->flags |= ST_EIO_PENDING;
 			if (bp)
 				bp->b_resid = xs->resid;
@@ -1739,14 +1732,14 @@ st_interpret_sense(xs)
 		}
 	} else {		/* must be variable mode */
 		xs->resid = xs->datalen;	/* to be sure */
-		if (sense->extended_flags & SSD_EOM)
+		if (sense->flags & SSD_EOM)
 			return EIO;
-		if (sense->extended_flags & SSD_FILEMARK) {
+		if (sense->flags & SSD_FILEMARK) {
 			if (bp)
 				bp->b_resid = bp->b_bcount;
 			return 0;
 		}
-		if (sense->extended_flags & SSD_ILI) {
+		if (sense->flags & SSD_ILI) {
 			if (info < 0) {
 				/*
 				 * the record was bigger than the read
@@ -1762,7 +1755,7 @@ st_interpret_sense(xs)
 				bp->b_resid = info;
 		}
 	}
-	key = sense->extended_flags & SSD_KEY;
+	key = sense->flags & SSD_KEY;
 
 	if (key == 0x8) {
 		/*
diff --git a/sys/scsi/cd.c b/sys/scsi/cd.c
index 0f8cab34b476..85e14ccd8fc8 100644
--- a/sys/scsi/cd.c
+++ b/sys/scsi/cd.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: cd.c,v 1.83 1996/03/17 00:59:41 thorpej Exp $	*/
+/*	$NetBSD: cd.c,v 1.84 1996/03/19 03:05:15 mycroft Exp $	*/
 
 /*
  * Copyright (c) 1994, 1995 Charles M. Hannum.  All rights reserved.
@@ -553,9 +553,7 @@ cdstart(v)
 			bzero(&cmd_small, sizeof(cmd_small));
 			cmd_small.opcode = (bp->b_flags & B_READ) ?
 			    READ_COMMAND : WRITE_COMMAND;
-			cmd_small.addr_2 = (blkno >> 16) & 0x1f;
-			cmd_small.addr_1 = (blkno >> 8) & 0xff;
-			cmd_small.addr_0 = blkno & 0xff;
+			_lto3b(blkno, cmd_small.addr);
 			cmd_small.length = nblks & 0xff;
 			cmdlen = sizeof(cmd_small);
 			cmdp = (struct scsi_generic *)&cmd_small;
@@ -566,12 +564,8 @@ cdstart(v)
 			bzero(&cmd_big, sizeof(cmd_big));
 			cmd_big.opcode = (bp->b_flags & B_READ) ?
 			    READ_BIG : WRITE_BIG;
-			cmd_big.addr_3 = (blkno >> 24) & 0xff;
-			cmd_big.addr_2 = (blkno >> 16) & 0xff;
-			cmd_big.addr_1 = (blkno >> 8) & 0xff;
-			cmd_big.addr_0 = blkno & 0xff;
-			cmd_big.length2 = (nblks >> 8) & 0xff;
-			cmd_big.length1 = nblks & 0xff;
+			_lto4b(blkno, cmd_big.addr);
+			_lto2b(nblks, cmd_big.length);
 			cmdlen = sizeof(cmd_big);
 			cmdp = (struct scsi_generic *)&cmd_big;
 		}
@@ -734,9 +728,8 @@ cdioctl(dev, cmd, addr, flag, p)
 					   &data, len);
 		if (error)
 			return error;
-		len = min(len, ((data.header.data_len[0] << 8) +
-		    data.header.data_len[1] +
-		    sizeof(struct cd_sub_channel_header)));
+		len = min(len, _2btol(data.header.data_len) +
+		    sizeof(struct cd_sub_channel_header));
 		return copyout(&data, args->data, len);
 	}
 	case CDIOREADTOCHEADER: {
@@ -972,14 +965,12 @@ cd_size(cd, flags)
 	    2000, NULL, flags | SCSI_DATA_IN) != 0)
 		return 0;
 
-	blksize = (rdcap.length_3 << 24) + (rdcap.length_2 << 16) +
-	    (rdcap.length_1 << 8) + rdcap.length_0;
+	blksize = _4btol(rdcap.length);
 	if (blksize < 512)
 		blksize = 2048;	/* some drives lie ! */
 	cd->params.blksize = blksize;
 
-	size = (rdcap.addr_3 << 24) + (rdcap.addr_2 << 16) +
-	    (rdcap.addr_1 << 8) + rdcap.addr_0 + 1;
+	size = _4btol(rdcap.addr) + 1;
 	if (size < 100)
 		size = 400000;	/* ditto */
 	cd->params.disksize = size;
@@ -1040,12 +1031,8 @@ cd_play(cd, blkno, nblks)
 
 	bzero(&scsi_cmd, sizeof(scsi_cmd));
 	scsi_cmd.opcode = PLAY;
-	scsi_cmd.blk_addr[0] = (blkno >> 24) & 0xff;
-	scsi_cmd.blk_addr[1] = (blkno >> 16) & 0xff;
-	scsi_cmd.blk_addr[2] = (blkno >> 8) & 0xff;
-	scsi_cmd.blk_addr[3] = blkno & 0xff;
-	scsi_cmd.xfer_len[0] = (nblks >> 8) & 0xff;
-	scsi_cmd.xfer_len[1] = nblks & 0xff;
+	_lto4b(blkno, scsi_cmd.blk_addr);
+	_lto2b(nblks, scsi_cmd.xfer_len);
 	return scsi_scsi_cmd(cd->sc_link, (struct scsi_generic *)&scsi_cmd,
 	    sizeof(scsi_cmd), 0, 0, CDRETRIES, 200000, NULL, 0);
 }
@@ -1062,14 +1049,8 @@ cd_play_big(cd, blkno, nblks)
 
 	bzero(&scsi_cmd, sizeof(scsi_cmd));
 	scsi_cmd.opcode = PLAY_BIG;
-	scsi_cmd.blk_addr[0] = (blkno >> 24) & 0xff;
-	scsi_cmd.blk_addr[1] = (blkno >> 16) & 0xff;
-	scsi_cmd.blk_addr[2] = (blkno >> 8) & 0xff;
-	scsi_cmd.blk_addr[3] = blkno & 0xff;
-	scsi_cmd.xfer_len[0] = (nblks >> 24) & 0xff;
-	scsi_cmd.xfer_len[1] = (nblks >> 16) & 0xff;
-	scsi_cmd.xfer_len[2] = (nblks >> 8) & 0xff;
-	scsi_cmd.xfer_len[3] = nblks & 0xff;
+	_lto4b(blkno, scsi_cmd.blk_addr);
+	_lto4b(nblks, scsi_cmd.xfer_len);
 	return scsi_scsi_cmd(cd->sc_link, (struct scsi_generic *)&scsi_cmd,
 	    sizeof(scsi_cmd), 0, 0, CDRETRIES, 20000, NULL, 0);
 }
@@ -1163,8 +1144,7 @@ cd_read_subchannel(cd, mode, format, track, data, len)
 	scsi_cmd.byte3 = SRS_SUBQ;
 	scsi_cmd.subchan_format = format;
 	scsi_cmd.track = track;
-	scsi_cmd.data_len[0] = (len >> 8) & 0xff;
-	scsi_cmd.data_len[1] = len & 0xff;
+	_lto2b(len, scsi_cmd.data_len);
 	return scsi_scsi_cmd(cd->sc_link, (struct scsi_generic *)&scsi_cmd,
 	    sizeof(struct scsi_read_subchannel), (u_char *)data, len,
 	    CDRETRIES, 5000, NULL, SCSI_DATA_IN);
@@ -1191,8 +1171,7 @@ cd_read_toc(cd, mode, start, data, len)
 	if (mode == CD_MSF_FORMAT)
 		scsi_cmd.byte2 |= CD_MSF;
 	scsi_cmd.from_track = start;
-	scsi_cmd.data_len[0] = (ntoc >> 8) & 0xff;
-	scsi_cmd.data_len[1] = ntoc & 0xff;
+	_lto2b(ntoc, scsi_cmd.data_len);
 	return scsi_scsi_cmd(cd->sc_link, (struct scsi_generic *)&scsi_cmd,
 	    sizeof(struct scsi_read_toc), (u_char *)data, len, CDRETRIES,
 	    5000, NULL, SCSI_DATA_IN);
diff --git a/sys/scsi/ch.c b/sys/scsi/ch.c
index 125a4e918674..e1644af55edf 100644
--- a/sys/scsi/ch.c
+++ b/sys/scsi/ch.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: ch.c,v 1.17 1996/03/17 00:59:44 thorpej Exp $	*/
+/*	$NetBSD: ch.c,v 1.18 1996/03/19 03:05:15 mycroft Exp $	*/
 
 /*
  * Copyright (c) 1994 Charles Hannum.  All rights reserved.
@@ -312,8 +312,7 @@ ch_getelem(ch, stat, type, from, data, flags)
 	bzero(&scsi_cmd, sizeof(scsi_cmd));
 	scsi_cmd.opcode = READ_ELEMENT_STATUS;
 	scsi_cmd.byte2 = type;
-	scsi_cmd.starting_element_addr[0] = (from >> 8) & 0xff;
-	scsi_cmd.starting_element_addr[1] = from & 0xff;
+	_lto2b(from, scsi_cmd.starting_element_addr);
 	scsi_cmd.number_of_elements[1] = 1;
 	scsi_cmd.allocation_length[2] = 32;
 
@@ -339,12 +338,9 @@ ch_move(ch, stat, chm, from, to, flags)
 
 	bzero(&scsi_cmd, sizeof(scsi_cmd));
 	scsi_cmd.opcode = MOVE_MEDIUM;
-	scsi_cmd.transport_element_address[0] = (chm >> 8) & 0xff;
-	scsi_cmd.transport_element_address[1] = chm & 0xff;
-	scsi_cmd.source_address[0] = (from >> 8) & 0xff;
-	scsi_cmd.source_address[1] = from & 0xff;
-	scsi_cmd.destination_address[0] = (to >> 8) & 0xff;
-	scsi_cmd.destination_address[1] = to & 0xff;
+	_lto2b(chm, scsi_cmd.transport_element_address);
+	_lto2b(from, scsi_cmd.source_address);
+	_lto2b(to, scsi_cmd.destination_address);
 	scsi_cmd.invert = (chm & CH_INVERT) ? 1 : 0;
 	error = scsi_scsi_cmd(ch->sc_link, (struct scsi_generic *) &scsi_cmd,
 	    sizeof(scsi_cmd), NULL, 0, CHRETRIES, 100000, NULL, flags);
@@ -366,10 +362,8 @@ ch_position(ch, stat, chm, to, flags)
 
 	bzero(&scsi_cmd, sizeof(scsi_cmd));
 	scsi_cmd.opcode = POSITION_TO_ELEMENT;
-	scsi_cmd.transport_element_address[0] = (chm >> 8) & 0xff;
-	scsi_cmd.transport_element_address[1] = chm & 0xff;
-	scsi_cmd.source_address[0] = (to >> 8) & 0xff;
-	scsi_cmd.source_address[1] = to & 0xff;
+	_lto2b(chm, scsi_cmd.transport_element_address);
+	_lto2b(to, scsi_cmd.source_address);
 	scsi_cmd.invert = (chm & CH_INVERT) ? 1 : 0;
 	error = scsi_scsi_cmd(ch->sc_link, (struct scsi_generic *) &scsi_cmd,
 	    sizeof(scsi_cmd), NULL, 0, CHRETRIES, 100000, NULL, flags);
diff --git a/sys/scsi/scsi_all.h b/sys/scsi/scsi_all.h
index 646826c872b4..81eeb7d9bd52 100644
--- a/sys/scsi/scsi_all.h
+++ b/sys/scsi/scsi_all.h
@@ -1,4 +1,4 @@
-/*	$NetBSD: scsi_all.h,v 1.6 1994/12/28 19:42:54 mycroft Exp $	*/
+/*	$NetBSD: scsi_all.h,v 1.7 1996/03/19 03:05:15 mycroft Exp $	*/
 
 /*
  * SCSI general  interface description
@@ -229,58 +229,33 @@ struct scsi_inquiry_data {
 	u_int8_t extra[8];
 };
 
-/*
- * This looks bad, and it is.  However it fixes padding problems
- * caused by using unions.  This *needs* to be an array, if this code
- * is to work on any architecture.
- */
-struct	scsi_sense_data {
-/* 1*/	u_int8_t error_code;		/* same bits as new version */
-#define XXX_unextended_blockhi	extended_segment
-#define XXX_unextended_blockmed	extended_flags
-#define XXX_unextended_blocklow	extended_info[0]
-/* 2*/	u_int8_t extended_segment;
-/* 3*/	u_int8_t extended_flags;	/* same bits as new version */
-/* 7*/	u_int8_t extended_info[4];
-/* 8*/	u_int8_t extended_extra_len;
-	/*
-	 * allocate enough room to hold new stuff
-	 * (by increasing 16 to 24 below)
-	 */
-/*32*/	u_int8_t extended_extra_bytes[24];
-};	/* total of 32 bytes */
+struct scsi_sense_data_unextended {
+/* 1*/	u_int8_t error_code;
+/* 4*/	u_int8_t block[3];
+};
 
-struct	scsi_sense_data_new {
+struct scsi_sense_data {
 /* 1*/	u_int8_t error_code;
 #define	SSD_ERRCODE		0x7F
 #define	SSD_ERRCODE_VALID	0x80
-	union {
-		struct {	/* this is deprecated, the standard says "DON'T"*/
-/* 2*/			u_int8_t blockhi;
-/* 3*/			u_int8_t blockmed;
-/* 4*/			u_int8_t blocklow;
-		} unextended;
-		struct {
-/* 2*/			u_int8_t segment;
-/* 3*/			u_int8_t flags;
+/* 2*/	u_int8_t segment;
+/* 3*/	u_int8_t flags;
 #define	SSD_KEY		0x0F
 #define	SSD_ILI		0x20
 #define	SSD_EOM		0x40
 #define	SSD_FILEMARK	0x80
-/* 7*/			u_int8_t info[4];
-/* 8*/			u_int8_t extra_len;
-/*12*/			u_int8_t cmd_spec_info[4];
-/*13*/			u_int8_t add_sense_code;
-/*14*/			u_int8_t add_sense_code_qual;
-/*15*/			u_int8_t fru;
-/*16*/			u_int8_t sense_key_spec_1;
-#define	SSD_SCS_VALID		0x80
-/*17*/			u_int8_t sense_key_spec_2;
-/*18*/			u_int8_t sense_key_spec_3;
-/*32*/			u_int8_t extra_bytes[14];
-		} extended;
-	} ext;
-}; /* total of 32 bytes */
+/* 7*/	u_int8_t info[4];
+/* 8*/	u_int8_t extra_len;
+/*12*/	u_int8_t cmd_spec_info[4];
+/*13*/	u_int8_t add_sense_code;
+/*14*/	u_int8_t add_sense_code_qual;
+/*15*/	u_int8_t fru;
+/*16*/	u_int8_t sense_key_spec_1;
+#define	SSD_SCS_VALID	0x80
+/*17*/	u_int8_t sense_key_spec_2;
+/*18*/	u_int8_t sense_key_spec_3;
+/*32*/	u_int8_t extra_bytes[14];
+};
 
 struct scsi_blk_desc {
 	u_int8_t density;
diff --git a/sys/scsi/scsi_base.c b/sys/scsi/scsi_base.c
index b33da12ccb89..0b6ef6ef063e 100644
--- a/sys/scsi/scsi_base.c
+++ b/sys/scsi/scsi_base.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: scsi_base.c,v 1.33 1996/02/14 21:47:14 christos Exp $	*/
+/*	$NetBSD: scsi_base.c,v 1.34 1996/03/19 03:05:15 mycroft Exp $	*/
 
 /*
  * Copyright (c) 1994, 1995 Charles Hannum.  All rights reserved.
@@ -194,7 +194,6 @@ scsi_size(sc_link, flags)
 {
 	struct scsi_read_cap_data rdcap;
 	struct scsi_read_capacity scsi_cmd;
-	u_long size;
 
 	/*
 	 * make up a scsi command and ask the scsi driver to do
@@ -213,13 +212,9 @@ scsi_size(sc_link, flags)
 		sc_print_addr(sc_link);
 		printf("could not get size\n");
 		return 0;
-	} else {
-		size = rdcap.addr_0 + 1;
-		size += rdcap.addr_1 << 8;
-		size += rdcap.addr_2 << 16;
-		size += rdcap.addr_3 << 24;
 	}
-	return size;
+
+	return _4btol(rdcap.addr) + 1;
 }
 
 /*
@@ -625,20 +620,20 @@ scsi_interpret_sense(xs)
 		    sense->error_code & SSD_ERRCODE,
 		    sense->error_code & SSD_ERRCODE_VALID ? 1 : 0);
 		printf("seg%x key%x ili%x eom%x fmark%x\n",
-		    sense->extended_segment,
-		    sense->extended_flags & SSD_KEY,
-		    sense->extended_flags & SSD_ILI ? 1 : 0,
-		    sense->extended_flags & SSD_EOM ? 1 : 0,
-		    sense->extended_flags & SSD_FILEMARK ? 1 : 0);
+		    sense->segment,
+		    sense->flags & SSD_KEY,
+		    sense->flags & SSD_ILI ? 1 : 0,
+		    sense->flags & SSD_EOM ? 1 : 0,
+		    sense->flags & SSD_FILEMARK ? 1 : 0);
 		printf("info: %x %x %x %x followed by %d extra bytes\n",
-		    sense->extended_info[0],
-		    sense->extended_info[1],
-		    sense->extended_info[2],
-		    sense->extended_info[3],
-		    sense->extended_extra_len);
+		    sense->info[0],
+		    sense->info[1],
+		    sense->info[2],
+		    sense->info[3],
+		    sense->extra_len);
 		printf("extra: ");
-		for (count = 0; count < sense->extended_extra_len; count++)
-			printf("%x ", sense->extended_extra_bytes[count]);
+		for (count = 0; count < sense->extra_len; count++)
+			printf("%x ", sense->extra_bytes[count]);
 		printf("\n");
 	}
 #endif	/*SCSIDEBUG */
@@ -660,15 +655,14 @@ scsi_interpret_sense(xs)
 		 */
 	case 0x71:		/* delayed error */
 		sc_print_addr(sc_link);
-		key = sense->extended_flags & SSD_KEY;
+		key = sense->flags & SSD_KEY;
 		printf(" DELAYED ERROR, key = 0x%x\n", key);
 	case 0x70:
-		if ((sense->error_code & SSD_ERRCODE_VALID) != 0) {
-			bcopy(sense->extended_info, &info, sizeof info);
-			info = ntohl(info);
-		} else
+		if ((sense->error_code & SSD_ERRCODE_VALID) != 0)
+			info = _4btol(sense->info);
+		else
 			info = 0;
-		key = sense->extended_flags & SSD_KEY;
+		key = sense->flags & SSD_KEY;
 
 		switch (key) {
 		case 0x0:	/* NO SENSE */
@@ -744,11 +738,11 @@ scsi_interpret_sense(xs)
 					printf(", info = %d (decimal)", info);
 				}
 			}
-			if (sense->extended_extra_len != 0) {
+			if (sense->extra_len != 0) {
 				int n;
 				printf(", data =");
-				for (n = 0; n < sense->extended_extra_len; n++)
-					printf(" %02x", sense->extended_extra_bytes[n]);
+				for (n = 0; n < sense->extra_len; n++)
+					printf(" %02x", sense->extra_bytes[n]);
 			}
 			printf("\n");
 		}
@@ -762,10 +756,10 @@ scsi_interpret_sense(xs)
 		printf("error code %d",
 		    sense->error_code & SSD_ERRCODE);
 		if ((sense->error_code & SSD_ERRCODE_VALID) != 0) {
+			struct scsi_sense_data_unextended *usense =
+			    (struct scsi_sense_data_unextended *)sense;
 			printf(" at block no. %d (decimal)",
-			    (sense->XXX_unextended_blockhi << 16) +
-			    (sense->XXX_unextended_blockmed << 8) +
-			    (sense->XXX_unextended_blocklow));
+			    _3btol(usense->block));
 		}
 		printf("\n");
 		return EIO;
@@ -776,36 +770,6 @@ scsi_interpret_sense(xs)
  * Utility routines often used in SCSI stuff
  */
 
-/*
- * convert a physical address to 3 bytes, 
- * MSB at the lowest address,
- * LSB at the highest.
- */
-void
-lto3b(val, bytes)
-	u_int32_t val;
-	u_int8_t *bytes;
-{
-
-	*bytes++ = (val >> 16) & 0xff;
-	*bytes++ = (val >> 8) & 0xff;
-	*bytes = val & 0xff;
-}
-
-/*
- * The reverse of lto3b
- */
-u_int32_t
-_3btol(bytes)
-	u_int8_t *bytes;
-{
-	u_int32_t rc;
-
-	rc = (*bytes++ << 16);
-	rc += (*bytes++ << 8);
-	rc += *bytes;
-	return (rc);
-}
 
 /*
  * Print out the scsi_link structure's address info.
diff --git a/sys/scsi/scsi_cd.h b/sys/scsi/scsi_cd.h
index bbd15676e981..526ef5eaae7f 100644
--- a/sys/scsi/scsi_cd.h
+++ b/sys/scsi/scsi_cd.h
@@ -1,4 +1,4 @@
-/*	$NetBSD: scsi_cd.h,v 1.5 1994/12/28 19:42:58 mycroft Exp $	*/
+/*	$NetBSD: scsi_cd.h,v 1.6 1996/03/19 03:05:15 mycroft Exp $	*/
 
 /*
  * Written by Julian Elischer (julian@tfs.com)
@@ -31,117 +31,111 @@
 
 struct scsi_read_capacity_cd {
 	u_int8_t opcode;
-	u_char	byte2;
-	u_char	addr_3;	/* Most Significant */
-	u_char	addr_2;
-	u_char	addr_1;
-	u_char	addr_0;	/* Least Significant */
-	u_char	unused[3];
-	u_char	control;
+	u_int8_t byte2;
+	u_int8_t addr[4];
+	u_int8_t unused[3];
+	u_int8_t control;
 };
 
 struct scsi_pause {
-	u_char	opcode;
-	u_char	byte2;
-	u_char	unused[6];
-	u_char	resume;
-	u_char	control;
+	u_int8_t opcode;
+	u_int8_t byte2;
+	u_int8_t unused[6];
+	u_int8_t resume;
+	u_int8_t control;
 };
 #define	PA_PAUSE	1
 #define PA_RESUME	0
 
 struct scsi_play_msf {
-	u_char	opcode;
-	u_char	byte2;
-	u_char	unused;
-	u_char	start_m;
-	u_char	start_s;
-	u_char	start_f;
-	u_char	end_m;
-	u_char	end_s;
-	u_char	end_f;
-	u_char	control;
+	u_int8_t opcode;
+	u_int8_t byte2;
+	u_int8_t unused;
+	u_int8_t start_m;
+	u_int8_t start_s;
+	u_int8_t start_f;
+	u_int8_t end_m;
+	u_int8_t end_s;
+	u_int8_t end_f;
+	u_int8_t control;
 };
 
 struct scsi_play_track {
-	u_char	opcode;
-	u_char	byte2;
-	u_char	unused[2];
-	u_char	start_track;
-	u_char	start_index;
-	u_char	unused1;
-	u_char	end_track;
-	u_char	end_index;
-	u_char	control;
+	u_int8_t opcode;
+	u_int8_t byte2;
+	u_int8_t unused[2];
+	u_int8_t start_track;
+	u_int8_t start_index;
+	u_int8_t unused1;
+	u_int8_t end_track;
+	u_int8_t end_index;
+	u_int8_t control;
 };
 
 struct scsi_play {
-	u_char	opcode;
-	u_char	byte2;
-	u_char	blk_addr[4];
-	u_char	unused;
-	u_char	xfer_len[2];
-	u_char	control;
+	u_int8_t opcode;
+	u_int8_t byte2;
+	u_int8_t blk_addr[4];
+	u_int8_t unused;
+	u_int8_t xfer_len[2];
+	u_int8_t control;
 };
 
 struct scsi_play_big {
-	u_char	opcode;
-	u_char	byte2;	/* same as above */
-	u_char	blk_addr[4];
-	u_char	xfer_len[4];
-	u_char	unused;
-	u_char	control;
+	u_int8_t opcode;
+	u_int8_t byte2;	/* same as above */
+	u_int8_t blk_addr[4];
+	u_int8_t xfer_len[4];
+	u_int8_t unused;
+	u_int8_t control;
 };
 
 struct scsi_play_rel_big {
-	u_char	opcode;
-	u_char	byte2;	/* same as above */
-	u_char	blk_addr[4];
-	u_char	xfer_len[4];
-	u_char	track;
-	u_char	control;
+	u_int8_t opcode;
+	u_int8_t byte2;	/* same as above */
+	u_int8_t blk_addr[4];
+	u_int8_t xfer_len[4];
+	u_int8_t track;
+	u_int8_t control;
 };
 
 struct scsi_read_header {
-	u_char	opcode;
-	u_char	byte2;
-	u_char	blk_addr[4];
-	u_char	unused;
-	u_char	data_len[2];
-	u_char	control;
+	u_int8_t opcode;
+	u_int8_t byte2;
+	u_int8_t blk_addr[4];
+	u_int8_t unused;
+	u_int8_t data_len[2];
+	u_int8_t control;
 };
 
 struct scsi_read_subchannel {
-	u_char	opcode;
-	u_char	byte2;
-	u_char	byte3;
+	u_int8_t opcode;
+	u_int8_t byte2;
+	u_int8_t byte3;
 #define	SRS_SUBQ	0x40
-	u_char	subchan_format;
-	u_char	unused[2];
-	u_char	track;
-	u_char	data_len[2];
-	u_char	control;
+	u_int8_t subchan_format;
+	u_int8_t unused[2];
+	u_int8_t track;
+	u_int8_t data_len[2];
+	u_int8_t control;
 };
 
 struct scsi_read_toc {
-	u_char	opcode;
-	u_char	byte2;
-	u_char	unused[4];
-	u_char	from_track;
-	u_char	data_len[2];
-	u_char	control;
+	u_int8_t opcode;
+	u_int8_t byte2;
+	u_int8_t unused[4];
+	u_int8_t from_track;
+	u_int8_t data_len[2];
+	u_int8_t control;
 };
 ;
 
 struct scsi_read_cd_capacity {
-	u_char	opcode;
-	u_char	byte2;
-	u_char	addr_3;	/* Most Significant */
-	u_char	addr_2;
-	u_char	addr_1;
-	u_char	addr_0;	/* Least Significant */
-	u_char	unused[3];
-	u_char	control;
+	u_int8_t opcode;
+	u_int8_t byte2;
+	u_int8_t addr[4];
+	u_int8_t unused[3];
+	u_int8_t control;
 };
 
 /*
@@ -162,33 +156,27 @@ struct scsi_read_cd_capacity {
 
 
 struct scsi_read_cd_cap_data {
-	u_char	addr_3;	/* Most significant */
-	u_char	addr_2;
-	u_char	addr_1;
-	u_char	addr_0;	/* Least significant */
-	u_char	length_3;	/* Most significant */
-	u_char	length_2;
-	u_char	length_1;
-	u_char	length_0;	/* Least significant */
+	u_int8_t addr[4];
+	u_int8_t length[4];
 };
 
 union cd_pages {
 	struct audio_page {
-		u_char	page_code;
+		u_int8_t page_code;
 #define	CD_PAGE_CODE	0x3F
 #define	AUDIO_PAGE	0x0e
 #define	CD_PAGE_PS	0x80
-		u_char	param_len;
-		u_char	flags;
+		u_int8_t param_len;
+		u_int8_t flags;
 #define		CD_PA_SOTC	0x02
 #define		CD_PA_IMMED	0x04
-		u_char	unused[2];
-		u_char	format_lba;
+		u_int8_t unused[2];
+		u_int8_t format_lba;
 #define		CD_PA_FORMAT_LBA	0x0F
 #define		CD_PA_APR_VALID	0x80
-		u_char	lb_per_sec[2];
+		u_int8_t lb_per_sec[2];
 		struct	port_control {
-			u_char	channels;
+			u_int8_t channels;
 #define	CHANNEL 0x0F
 #define	CHANNEL_0 1
 #define	CHANNEL_1 2
@@ -196,7 +184,7 @@ union cd_pages {
 #define	CHANNEL_3 8
 #define	LEFT_CHANNEL	CHANNEL_0
 #define	RIGHT_CHANNEL	CHANNEL_1
-			u_char	volume;
+			u_int8_t volume;
 		} port[4];
 #define	LEFT_PORT	0
 #define	RIGHT_PORT	1
diff --git a/sys/scsi/scsi_changer.h b/sys/scsi/scsi_changer.h
index 5161ce8e1664..677237e6a046 100644
--- a/sys/scsi/scsi_changer.h
+++ b/sys/scsi/scsi_changer.h
@@ -1,4 +1,4 @@
-/*	$NetBSD: scsi_changer.h,v 1.5 1994/12/28 19:42:59 mycroft Exp $	*/
+/*	$NetBSD: scsi_changer.h,v 1.6 1996/03/19 03:05:15 mycroft Exp $	*/
 
 /*
  * SCSI changer interface description
@@ -28,16 +28,16 @@
  * SCSI command format
  */
 struct scsi_read_element_status {
-        u_char  opcode;
-	u_char	byte2;
+        u_int8_t opcode;
+	u_int8_t byte2;
 #define	SRES_ELEM_TYPE_CODE 	0x0F
 #define	SRES_ELEM_VOLTAG 	0x10
-	u_char	starting_element_addr[2];
-	u_char	number_of_elements[2];
-	u_char	resv1;
-	u_char	allocation_length[3];
-	u_char	resv2;
-	u_char	control;
+	u_int8_t starting_element_addr[2];
+	u_int8_t number_of_elements[2];
+	u_int8_t resv1;
+	u_int8_t allocation_length[3];
+	u_int8_t resv2;
+	u_int8_t control;
 };
 #define RE_ALL_ELEMENTS			0
 #define RE_MEDIUM_TRANSPORT_ELEMENT	1
@@ -46,24 +46,24 @@ struct scsi_read_element_status {
 #define RE_DATA_TRANSFER_ELEMENT	4
 
 struct scsi_move_medium {
-	u_char  opcode;
-	u_char	byte2;
-	u_char  transport_element_address[2];
-	u_char  source_address[2];
-	u_char  destination_address[2];
-	u_char  rsvd[2];
-	u_char  invert;
-	u_char	control;
+	u_int8_t opcode;
+	u_int8_t byte2;
+	u_int8_t transport_element_address[2];
+	u_int8_t source_address[2];
+	u_int8_t destination_address[2];
+	u_int8_t rsvd[2];
+	u_int8_t invert;
+	u_int8_t control;
 };
 
 struct scsi_position_to_element {
-	u_char  opcode;
-        u_char  byte2;
-	u_char  transport_element_address[2];
-	u_char  source_address[2];
-	u_char  rsvd[2];
-	u_char  invert;
-	u_char	control;
+	u_int8_t opcode;
+        u_int8_t byte2;
+	u_int8_t transport_element_address[2];
+	u_int8_t source_address[2];
+	u_int8_t rsvd[2];
+	u_int8_t invert;
+	u_int8_t control;
 };
 	
 /*
@@ -74,20 +74,20 @@ struct scsi_position_to_element {
 #define READ_ELEMENT_STATUS     0xb8
 
 struct scsi_element_status_data {
-	u_char	first_element_reported[2];
-	u_char	number_of_elements_reported[2];
-	u_char  rsvd;
-	u_char	byte_count_of_report[3];
+	u_int8_t first_element_reported[2];
+	u_int8_t number_of_elements_reported[2];
+	u_int8_t rsvd;
+	u_int8_t byte_count_of_report[3];
 };
 
 struct element_status_page {
-	u_char	element_type_code;
-	u_char	flags;
+	u_int8_t element_type_code;
+	u_int8_t flags;
 #define	ESP_AVOLTAG	0x40
 #define	ESP_PVOLTAG	0x80
-	u_char element_descriptor_length[2];
-	u_char rsvd;
-	u_char byte_count_of_descriptor_data[3];
+	u_int8_t element_descriptor_length[2];
+	u_int8_t rsvd;
+	u_int8_t byte_count_of_descriptor_data[3];
 };
 
 #endif /* _SCSI_SCSI_CHANGER_H */
diff --git a/sys/scsi/scsi_disk.h b/sys/scsi/scsi_disk.h
index 3b3e3350c886..fd09456a5cf3 100644
--- a/sys/scsi/scsi_disk.h
+++ b/sys/scsi/scsi_disk.h
@@ -1,4 +1,4 @@
-/*	$NetBSD: scsi_disk.h,v 1.8 1995/10/15 23:32:02 thorpej Exp $	*/
+/*	$NetBSD: scsi_disk.h,v 1.9 1996/03/19 03:05:15 mycroft Exp $	*/
 
 /*
  * SCSI interface description
@@ -57,56 +57,47 @@
 #define _SCSI_SCSI_DISK_H 1
 
 struct scsi_reassign_blocks {
-	u_char	opcode;
-	u_char	byte2;
-	u_char	unused[3];
-	u_char	control;
+	u_int8_t opcode;
+	u_int8_t byte2;
+	u_int8_t unused[3];
+	u_int8_t control;
 };
 
 struct scsi_rw {
-	u_char	opcode;
-	u_char	addr_2;		/* Most significant */
+	u_int8_t opcode;
+	u_int8_t addr[3];
 #define	SRW_TOPADDR	0x1F	/* only 5 bits here */
-	u_char	addr_1;
-	u_char	addr_0;		/* least significant */
-	u_char	length;
-	u_char	control;
+	u_int8_t length;
+	u_int8_t control;
 };
 
 struct scsi_rw_big {
-	u_char	opcode;
-	u_char	byte2;
+	u_int8_t opcode;
+	u_int8_t byte2;
 #define	SRWB_RELADDR	0x01
-	u_char	addr_3;		/* Most significant */
-	u_char	addr_2;
-	u_char	addr_1;
-	u_char	addr_0;		/* least significant */
-	u_char	reserved;
-	u_char	length2;
-	u_char	length1;
-	u_char	control;
+	u_int8_t addr[4];
+	u_int8_t reserved;
+	u_int8_t length[2];
+	u_int8_t control;
 };
 
 struct scsi_read_capacity {
-	u_char	opcode;
-	u_char	byte2;
-	u_char	addr_3;	/* Most Significant */
-	u_char	addr_2;
-	u_char	addr_1;
-	u_char	addr_0;	/* Least Significant */
-	u_char	unused[3];
-	u_char	control;
+	u_int8_t opcode;
+	u_int8_t byte2;
+	u_int8_t addr[4];
+	u_int8_t unused[3];
+	u_int8_t control;
 };
 
 struct scsi_start_stop {
-	u_char	opcode;
-	u_char	byte2;
-	u_char	unused[2];
-	u_char	how;
+	u_int8_t opcode;
+	u_int8_t byte2;
+	u_int8_t unused[2];
+	u_int8_t how;
 #define	SSS_STOP		0x00
 #define	SSS_START		0x01
 #define	SSS_LOEJ		0x02
-	u_char	control;
+	u_int8_t control;
 };
 
 
@@ -128,89 +119,60 @@ struct scsi_start_stop {
 
 
 struct scsi_read_cap_data {
-	u_char	addr_3;	/* Most significant */
-	u_char	addr_2;
-	u_char	addr_1;
-	u_char	addr_0;	/* Least significant */
-	u_char	length_3;	/* Most significant */
-	u_char	length_2;
-	u_char	length_1;
-	u_char	length_0;	/* Least significant */
+	u_int8_t addr[4];
+	u_int8_t length[4];
 };
 
 struct scsi_reassign_blocks_data {
-	u_char	reserved[2];
-	u_char	length_msb;
-	u_char	length_lsb;
+	u_int8_t reserved[2];
+	u_int8_t length[2];
 	struct {
-		u_char	dlbaddr_3;	/* defect logical block address (MSB) */
-		u_char	dlbaddr_2;
-		u_char	dlbaddr_1;
-		u_char	dlbaddr_0;	/* defect logical block address (LSB) */
+		u_int8_t dlbaddr[4];
 	} defect_descriptor[1];
 };
 
-union disk_pages { /* this is the structure copied from osf */
-	struct page_disk_format {
-	   u_char pg_code;	/* page code (should be 3)	      */
+union disk_pages {
 #define	DISK_PGCODE	0x3F	/* only 6 bits valid */
-	   u_char pg_length;	/* page length (should be 0x16)	      */
-	   u_char trk_z_1;	/* tracks per zone (MSB)	      */
-	   u_char trk_z_0;	/* tracks per zone (LSB)	      */
-	   u_char alt_sec_1;	/* alternate sectors per zone (MSB)   */
-	   u_char alt_sec_0;	/* alternate sectors per zone (LSB)   */
-	   u_char alt_trk_z_1;	/* alternate tracks per zone (MSB)    */
-	   u_char alt_trk_z_0;	/* alternate tracks per zone (LSB)    */
-	   u_char alt_trk_v_1;	/* alternate tracks per volume (MSB)  */
-	   u_char alt_trk_v_0;	/* alternate tracks per volume (LSB)  */
-	   u_char ph_sec_t_1;	/* physical sectors per track (MSB)   */
-	   u_char ph_sec_t_0;	/* physical sectors per track (LSB)   */
-	   u_char bytes_s_1;	/* bytes per sector (MSB)	      */
-	   u_char bytes_s_0;	/* bytes per sector (LSB)	      */
-	   u_char interleave_1;/* interleave (MSB)		      */
-	   u_char interleave_0;/* interleave (LSB)		      */
-	   u_char trk_skew_1;	/* track skew factor (MSB)	      */
-	   u_char trk_skew_0;	/* track skew factor (LSB)	      */
-	   u_char cyl_skew_1;	/* cylinder skew (MSB)		      */
-	   u_char cyl_skew_0;	/* cylinder skew (LSB)		      */
-	   u_char flags;	/* various */
-#define		DISK_FMT_SURF	0x10
-#define		DISK_FMT_RMB	0x20
-#define		DISK_FMT_HSEC	0x40
-#define		DISK_FMT_SSEC	0x80
-	   u_char reserved2;
-	   u_char reserved3;
+	struct page_disk_format {
+		u_int8_t pg_code;	/* page code (should be 3) */
+		u_int8_t pg_length;	/* page length (should be 0x16) */
+		u_int8_t trk_z[2];	/* tracks per zone */
+		u_int8_t alt_sec[2];	/* alternate sectors per zone */
+		u_int8_t alt_trk_z[2];	/* alternate tracks per zone */
+		u_int8_t alt_trk_v[2];	/* alternate tracks per volume */
+		u_int8_t ph_sec_t[2];	/* physical sectors per track */
+		u_int8_t bytes_s[2];	/* bytes per sector */
+		u_int8_t interleave[2];	/* interleave */
+		u_int8_t trk_skew[2];	/* track skew factor */
+		u_int8_t cyl_skew[2];	/* cylinder skew */
+		u_int8_t flags;		/* various */
+#define	DISK_FMT_SURF	0x10
+#define	DISK_FMT_RMB	0x20
+#define	DISK_FMT_HSEC	0x40
+#define	DISK_FMT_SSEC	0x80
+		u_int8_t reserved2;
+		u_int8_t reserved3;
 	} disk_format;
 	struct page_rigid_geometry {
-	   u_char pg_code;	/* page code (should be 4)	      */
-	   u_char pg_length;	/* page length (should be 0x16)	      */
-	   u_char ncyl_2;	/* number of cylinders (MSB)	      */
-	   u_char ncyl_1;	/* number of cylinders 		      */
-	   u_char ncyl_0;	/* number of cylinders (LSB)	      */
-	   u_char nheads;	/* number of heads 		      */
-	   u_char st_cyl_wp_2;	/* starting cyl., write precomp (MSB) */
-	   u_char st_cyl_wp_1;	/* starting cyl., write precomp	      */
-	   u_char st_cyl_wp_0;	/* starting cyl., write precomp (LSB) */
-	   u_char st_cyl_rwc_2;/* starting cyl., red. write cur (MSB)*/
-	   u_char st_cyl_rwc_1;/* starting cyl., red. write cur      */
-	   u_char st_cyl_rwc_0;/* starting cyl., red. write cur (LSB)*/
-	   u_char driv_step_1;	/* drive step rate (MSB)	      */
-	   u_char driv_step_0;	/* drive step rate (LSB)	      */
-	   u_char land_zone_2;	/* landing zone cylinder (MSB)	      */
-	   u_char land_zone_1;	/* landing zone cylinder 	      */
-	   u_char land_zone_0;	/* landing zone cylinder (LSB)	      */
-	   u_char sp_sync_ctl;	/* spindle synch control              */
+		u_int8_t pg_code;	/* page code (should be 4) */
+		u_int8_t pg_length;	/* page length (should be 0x16)	*/
+		u_int8_t ncyl[3];	/* number of cylinders */
+		u_int8_t nheads;	/* number of heads */
+		u_int8_t st_cyl_wp[3];	/* starting cyl., write precomp */
+		u_int8_t st_cyl_rwc[3];	/* starting cyl., red. write cur */
+		u_int8_t driv_step[2];	/* drive step rate */
+		u_int8_t land_zone[3];	/* landing zone cylinder */
+		u_int8_t sp_sync_ctl;	/* spindle synch control */
 #define SPINDLE_SYNCH_MASK	0x03	/* mask of valid bits */
 #define SPINDLE_SYNCH_NONE	0x00	/* synch disabled or not supported */
 #define SPINDLE_SYNCH_SLAVE	0x01	/* disk is a slave */
 #define SPINDLE_SYNCH_MASTER	0x02	/* disk is a master */
 #define SPINDLE_SYNCH_MCONTROL	0x03	/* disk is a master control */
-	   u_char rot_offset;	/* rotational offset (for spindle synch) */
-	   u_char reserved1;
-	   u_char rpm_1;	/* media rotation speed (MSB)         */
-	   u_char rpm_0;	/* media rotation speed (LSB)         */
-	   u_char reserved2;
-	   u_char reserved3;
+		u_int8_t rot_offset;	/* rotational offset (for spindle synch) */
+		u_int8_t reserved1;
+		u_int8_t rpm[2];	/* media rotation speed */
+		u_int8_t reserved2;
+		u_int8_t reserved3;
     	} rigid_geometry;
 };
 
diff --git a/sys/scsi/scsi_scanner.h b/sys/scsi/scsi_scanner.h
index 0db8028c2f69..7ea6985c44f0 100644
--- a/sys/scsi/scsi_scanner.h
+++ b/sys/scsi/scsi_scanner.h
@@ -47,62 +47,62 @@
 struct scsi_rw_scanner {
 #define	READ			0x08
 #define WRITE			0x0a
-	u_char	opcode;
-	u_char	byte2;
+	u_int8_t opcode;
+	u_int8_t byte2;
 #define	SRW_FIXED		0x01
-	u_char	len[3];
-	u_char	control;
+	u_int8_t len[3];
+	u_int8_t control;
 };
 
 struct scsi_start_stop {
-	u_char	opcode;
-	u_char	byte2;
-	u_char	unused[2];
-	u_char  how;
+	u_int8_t opcode;
+	u_int8_t byte2;
+	u_int8_t unused[2];
+	u_int8_t how;
 #define	SSS_STOP		0x00
 #define	SSS_START		0x01
 #define	SSS_LOEJ		0x02
-	u_char	control;
+	u_int8_t control;
 };
 
 struct scsi_set_window {
 #define SET_WINDOW		0x24 /* set params of image area and windows */
 #define GET_WINDOW		0x25
-	u_char	opcode;
-	u_char	byte2;
-	u_char	reserved[4];
-	u_char  len[3];
-	u_char	control;
+	u_int8_t opcode;
+	u_int8_t byte2;
+	u_int8_t reserved[4];
+	u_int8_t len[3];
+	u_int8_t control;
 };
 
 struct scsi_window_header {
-	u_char	reserved[6];
-	u_char  len[2];		    /* MSB-LSB */
+	u_int8_t reserved[6];
+	u_int8_t len[2];
 };
 
 struct scsi_window_data {
-	u_char	window_id;	    /* must be zero */
-	u_char	res1:7;
-	u_char	auto_bit:1;
-	u_char	x_res[2];
-	u_char	y_res[2];
-	u_char	x_org[4];
-	u_char	y_org[4];
-	u_char	width[4];
-	u_char	length[4];
-	u_char	brightness;
-	u_char	threshold;
-	u_char	contrast;
-	u_char	image_comp;	    /* image composition (data type) */
-	u_char	bits_per_pixel;
-	u_char	halftone_pattern[2];
-	u_char	rif:1;		    /* reverse image format (mono negative) */
-	u_char  res2:4;
-	u_char	pad_type:3;
-	u_char	bit_ordering[2];
-	u_char	compression_type;
-	u_char	compression_arg;
-	u_char	res3[6];
+	u_int8_t window_id;	    /* must be zero */
+	u_int8_t res1:7;
+	u_int8_t auto_bit:1;
+	u_int8_t x_res[2];
+	u_int8_t y_res[2];
+	u_int8_t x_org[4];
+	u_int8_t y_org[4];
+	u_int8_t width[4];
+	u_int8_t length[4];
+	u_int8_t brightness;
+	u_int8_t threshold;
+	u_int8_t contrast;
+	u_int8_t image_comp;	    /* image composition (data type) */
+	u_int8_t bits_per_pixel;
+	u_int8_t halftone_pattern[2];
+	u_int8_t rif:1;		    /* reverse image format (mono negative) */
+	u_int8_t res2:4;
+	u_int8_t pad_type:3;
+	u_int8_t bit_ordering[2];
+	u_int8_t compression_type;
+	u_int8_t compression_arg;
+	u_int8_t res3[6];
 };
 
 /* mustek scsi commands */
diff --git a/sys/scsi/scsi_tape.h b/sys/scsi/scsi_tape.h
index 654b02ac7ec1..eaaf276bc6c0 100644
--- a/sys/scsi/scsi_tape.h
+++ b/sys/scsi/scsi_tape.h
@@ -1,4 +1,4 @@
-/*	$NetBSD: scsi_tape.h,v 1.7 1996/01/11 03:36:34 thorpej Exp $	*/
+/*	$NetBSD: scsi_tape.h,v 1.8 1996/03/19 03:05:15 mycroft Exp $	*/
 
 /*
  * Copyright (c) 1994 Charles Hannum.  All rights reserved.
@@ -60,97 +60,93 @@
 #define	READ			0x08
 #define WRITE			0x0a
 struct scsi_rw_tape {
-	u_char	opcode;
-	u_char	byte2;
+	u_int8_t opcode;
+	u_int8_t byte2;
 #define	SRW_FIXED		0x01
-	u_char	len[3];
-	u_char	control;
+	u_int8_t len[3];
+	u_int8_t control;
 };
 
 #define	SPACE			0x11
 struct scsi_space {
-	u_char	opcode;
-	u_char	byte2;
+	u_int8_t opcode;
+	u_int8_t byte2;
 #define	SS_CODE			0x03
 #define SP_BLKS			0x00
 #define SP_FILEMARKS		0x01
 #define SP_SEQ_FILEMARKS	0x02
 #define	SP_EOM			0x03
-	u_char	number[3];
-	u_char	control;
+	u_int8_t number[3];
+	u_int8_t control;
 };
 
 #define	WRITE_FILEMARKS		0x10
 struct scsi_write_filemarks {
-	u_char	opcode;
-	u_char	byte2;
-	u_char	number[3];
-	u_char	control;
+	u_int8_t opcode;
+	u_int8_t byte2;
+	u_int8_t number[3];
+	u_int8_t control;
 };
 
 #define REWIND			0x01
 struct scsi_rewind {
-	u_char	opcode;
-	u_char	byte2;
+	u_int8_t opcode;
+	u_int8_t byte2;
 #define	SR_IMMED		0x01
-	u_char	unused[3];
-	u_char	control;
+	u_int8_t unused[3];
+	u_int8_t control;
 };
 
 #define LOAD			0x1b
 struct scsi_load {
-	u_char	opcode;
-	u_char	byte2;
+	u_int8_t opcode;
+	u_int8_t byte2;
 #define	SL_IMMED		0x01
-	u_char	unused[2];
-	u_char	how;
+	u_int8_t unused[2];
+	u_int8_t how;
 #define LD_UNLOAD		0x00
 #define LD_LOAD			0x01
 #define LD_RETENSION		0x02
-	u_char	control;
+	u_int8_t control;
 };
 
 #define	ERASE			0x19
 struct scsi_erase {
-	u_char	opcode;
-	u_char	byte2;
+	u_int8_t opcode;
+	u_int8_t byte2;
 #define	SE_LONG			0x01
 #define	SE_IMMED		0x02
-	u_char	unused[3];
-	u_char	control;
+	u_int8_t unused[3];
+	u_int8_t control;
 };
 
 #define	READ_BLOCK_LIMITS	0x05
 struct scsi_block_limits {
-	u_char	opcode;
-	u_char	byte2;
-	u_char	unused[3];
-	u_char	control;
+	u_int8_t opcode;
+	u_int8_t byte2;
+	u_int8_t unused[3];
+	u_int8_t control;
 };
 
 struct scsi_block_limits_data {
-	u_char	reserved;
-	u_char	max_length_2;	/* Most significant */
-	u_char	max_length_1;
-	u_char	max_length_0;	/* Least significant */
-	u_char	min_length_1;	/* Most significant */
-	u_char	min_length_0;	/* Least significant */
+	u_int8_t reserved;
+	u_int8_t max_length[3];	/* Most significant */
+	u_int8_t min_length[2];	/* Most significant */
 };
 
 /* See SCSI-II spec 9.3.3.1 */
 struct scsi_tape_dev_conf_page {
-	u_char	pagecode;	/* 0x10 */
-	u_char	pagelength;	/* 0x0e */
-	u_char	byte2;
+	u_int8_t pagecode;	/* 0x10 */
+	u_int8_t pagelength;	/* 0x0e */
+	u_int8_t byte2;
 #define	SMT_CAP			0x40	/* change active partition */
 #define	SMT_CAF			0x20	/* change active format */
 #define	SMT_AFMASK		0x1f	/* active format mask */
-	u_char	active_partition;
-	u_char	wb_full_ratio;
-	u_char	rb_empty_ratio;
-	u_char	wrdelay_time_1;		/* MSB */
-	u_char	wrdelay_time_0;		/* LSB */
-	u_char	byte8;
+	u_int8_t active_partition;
+	u_int8_t wb_full_ratio;
+	u_int8_t rb_empty_ratio;
+	u_int8_t wrdelay_time[2];
+	u_int8_t byte8;
 #define	SMT_DBR			0x80	/* data buffer recovery */
 #define	SMT_BIS			0x40	/* block identifiers supported */
 #define	SMT_RSMK		0x20	/* report setmarks */
@@ -158,18 +154,16 @@ struct scsi_tape_dev_conf_page {
 #define SMT_SOCF_MASK		0xc0	/* stop on consecutive formats */
 #define	SMT_RBO			0x20	/* recover buffer order */
 #define	SMT_REW			0x10	/* report early warning */
-	u_char	gap_size;
-	u_char	byte10;
+	u_int8_t gap_size;
+	u_int8_t byte10;
 #define	SMT_EODDEFINED		0xe0	/* EOD defined */
 #define	SMT_EEG			0x10	/* enable EOD generation */
 #define	SMT_SEW			0x80	/* synchronize at early warning */
-	u_char	ew_bufsize_2;		/* MSB */
-	u_char	ew_bufsize_1;		/* ... */
-	u_char	ew_bufsize_0;		/* LSB */
-	u_char	sel_comp_alg;
+	u_int8_t ew_bufsize[3];
+	u_int8_t sel_comp_alg;
 #define	SMT_COMP_NONE		0x00
 #define	SMT_COMP_DEFAULT	0x01
-	u_char	reserved;
+	u_int8_t reserved;
 };
 
 /* defines for the device specific byte in the mode select/sense header */
@@ -182,11 +176,11 @@ struct scsi_tape_dev_conf_page {
 
 /* A special for the CIPHER ST150S(old drive) */
 struct block_desc_cipher {
-	u_char	density;
-	u_char	nblocks[3];
-	u_char	reserved;
-	u_char	blklen[3];
-	u_char  other;
+	u_int8_t density;
+	u_int8_t nblocks[3];
+	u_int8_t reserved;
+	u_int8_t blklen[3];
+	u_int8_t other;
 #define ST150_SEC		0x01	/* soft error count */
 #define	SR150_AUI		0x02	/* autoload inhibit */
 };
diff --git a/sys/scsi/scsiconf.h b/sys/scsi/scsiconf.h
index efda1dde6bf1..dc94894f8bd1 100644
--- a/sys/scsi/scsiconf.h
+++ b/sys/scsi/scsiconf.h
@@ -1,4 +1,4 @@
-/*	$NetBSD: scsiconf.h,v 1.28 1996/02/18 20:32:45 mycroft Exp $	*/
+/*	$NetBSD: scsiconf.h,v 1.29 1996/03/19 03:05:15 mycroft Exp $	*/
 
 /*
  * Copyright (c) 1993, 1994, 1995 Charles Hannum.  All rights reserved.
@@ -288,8 +288,156 @@ void show_mem __P((u_char *, int));
 int scsi_probe_busses __P((int, int, int));
 void scsi_strvis __P((u_char *, u_char *, int));
 
+static __inline void _lto2b __P((u_int32_t val, u_int8_t *bytes));
+static __inline void _lto3b __P((u_int32_t val, u_int8_t *bytes));
+static __inline void _lto4b __P((u_int32_t val, u_int8_t *bytes));
+static __inline u_int32_t _2btol __P((u_int8_t *bytes));
+static __inline u_int32_t _3btol __P((u_int8_t *bytes));
+static __inline u_int32_t _4btol __P((u_int8_t *bytes));
 
-void lto3b __P((u_int32_t val, u_int8_t *bytes));
-u_int32_t _3btol __P((u_int8_t *bytes));
+static __inline void _lto2l __P((u_int32_t val, u_int8_t *bytes));
+static __inline void _lto3l __P((u_int32_t val, u_int8_t *bytes));
+static __inline void _lto4l __P((u_int32_t val, u_int8_t *bytes));
+static __inline u_int32_t _2ltol __P((u_int8_t *bytes));
+static __inline u_int32_t _3ltol __P((u_int8_t *bytes));
+static __inline u_int32_t _4ltol __P((u_int8_t *bytes));
+
+static __inline void
+_lto2b(val, bytes)
+	u_int32_t val;
+	u_int8_t *bytes;
+{
+
+	bytes[0] = (val >> 8) & 0xff;
+	bytes[1] = val & 0xff;
+}
+
+static __inline void
+_lto3b(val, bytes)
+	u_int32_t val;
+	u_int8_t *bytes;
+{
+
+	bytes[0] = (val >> 16) & 0xff;
+	bytes[1] = (val >> 8) & 0xff;
+	bytes[2] = val & 0xff;
+}
+
+static __inline void
+_lto4b(val, bytes)
+	u_int32_t val;
+	u_int8_t *bytes;
+{
+
+	bytes[0] = (val >> 24) & 0xff;
+	bytes[1] = (val >> 16) & 0xff;
+	bytes[2] = (val >> 8) & 0xff;
+	bytes[3] = val & 0xff;
+}
+
+static __inline u_int32_t
+_2btol(bytes)
+	u_int8_t *bytes;
+{
+	register u_int32_t rv;
+
+	rv = (bytes[0] << 8) |
+	     bytes[1];
+	return (rv);
+}
+
+static __inline u_int32_t
+_3btol(bytes)
+	u_int8_t *bytes;
+{
+	register u_int32_t rv;
+
+	rv = (bytes[0] << 16) |
+	     (bytes[1] << 8) |
+	     bytes[2];
+	return (rv);
+}
+
+static __inline u_int32_t
+_4btol(bytes)
+	u_int8_t *bytes;
+{
+	register u_int32_t rv;
+
+	rv = (bytes[0] << 24) |
+	     (bytes[1] << 16) |
+	     (bytes[2] << 8) |
+	     bytes[3];
+	return (rv);
+}
+
+static __inline void
+_lto2l(val, bytes)
+	u_int32_t val;
+	u_int8_t *bytes;
+{
+
+	bytes[0] = val & 0xff;
+	bytes[1] = (val >> 8) & 0xff;
+}
+
+static __inline void
+_lto3l(val, bytes)
+	u_int32_t val;
+	u_int8_t *bytes;
+{
+
+	bytes[0] = val & 0xff;
+	bytes[1] = (val >> 8) & 0xff;
+	bytes[2] = (val >> 16) & 0xff;
+}
+
+static __inline void
+_lto4l(val, bytes)
+	u_int32_t val;
+	u_int8_t *bytes;
+{
+
+	bytes[0] = val & 0xff;
+	bytes[1] = (val >> 8) & 0xff;
+	bytes[2] = (val >> 16) & 0xff;
+	bytes[3] = (val >> 24) & 0xff;
+}
+
+static __inline u_int32_t
+_2ltol(bytes)
+	u_int8_t *bytes;
+{
+	register u_int32_t rv;
+
+	rv = bytes[0] |
+	     (bytes[1] << 8);
+	return (rv);
+}
+
+static __inline u_int32_t
+_3ltol(bytes)
+	u_int8_t *bytes;
+{
+	register u_int32_t rv;
+
+	rv = bytes[0] |
+	     (bytes[1] << 8) |
+	     (bytes[2] << 16);
+	return (rv);
+}
+
+static __inline u_int32_t
+_4ltol(bytes)
+	u_int8_t *bytes;
+{
+	register u_int32_t rv;
+
+	rv = bytes[0] |
+	     (bytes[1] << 8) |
+	     (bytes[2] << 16) |
+	     (bytes[3] << 24);
+	return (rv);
+}
 
 #endif /* SCSI_SCSICONF_H */
diff --git a/sys/scsi/sd.c b/sys/scsi/sd.c
index 6125fd68a924..d22ff46cef73 100644
--- a/sys/scsi/sd.c
+++ b/sys/scsi/sd.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: sd.c,v 1.90 1996/03/17 02:06:50 pk Exp $	*/
+/*	$NetBSD: sd.c,v 1.91 1996/03/19 03:05:15 mycroft Exp $	*/
 
 /*
  * Copyright (c) 1994, 1995 Charles M. Hannum.  All rights reserved.
@@ -106,7 +106,6 @@ void	sdminphys __P((struct buf *));
 void	sdgetdisklabel __P((struct sd_softc *));
 void	sdstart __P((void *));
 int	sddone __P((struct scsi_xfer *, int));
-u_long	sd_size __P((struct sd_softc *, int));
 int	sd_reassign_blocks __P((struct sd_softc *, u_long));
 int	sd_get_parms __P((struct sd_softc *, int));
 
@@ -569,9 +568,7 @@ sdstart(v)
 			bzero(&cmd_small, sizeof(cmd_small));
 			cmd_small.opcode = (bp->b_flags & B_READ) ?
 			    READ_COMMAND : WRITE_COMMAND;
-			cmd_small.addr_2 = (blkno >> 16) & 0x1f;
-			cmd_small.addr_1 = (blkno >> 8) & 0xff;
-			cmd_small.addr_0 = blkno & 0xff;
+			_lto3b(blkno, cmd_small.addr);
 			cmd_small.length = nblks & 0xff;
 			cmdlen = sizeof(cmd_small);
 			cmdp = (struct scsi_generic *)&cmd_small;
@@ -582,12 +579,8 @@ sdstart(v)
 			bzero(&cmd_big, sizeof(cmd_big));
 			cmd_big.opcode = (bp->b_flags & B_READ) ?
 			    READ_BIG : WRITE_BIG;
-			cmd_big.addr_3 = (blkno >> 24) & 0xff;
-			cmd_big.addr_2 = (blkno >> 16) & 0xff;
-			cmd_big.addr_1 = (blkno >> 8) & 0xff;
-			cmd_big.addr_0 = blkno & 0xff;
-			cmd_big.length2 = (nblks >> 8) & 0xff;
-			cmd_big.length1 = nblks & 0xff;
+			_lto4b(blkno, cmd_big.addr);
+			_lto2b(nblks, cmd_big.length);
 			cmdlen = sizeof(cmd_big);
 			cmdp = (struct scsi_generic *)&cmd_big;
 		}
@@ -805,47 +798,13 @@ sdgetdisklabel(sd)
 	}
 }
 
-/*
- * Find out from the device what it's capacity is
- */
-u_long
-sd_size(sd, flags)
-	struct sd_softc *sd;
-	int flags;
-{
-	struct scsi_read_cap_data rdcap;
-	struct scsi_read_capacity scsi_cmd;
-	u_long size;
-
-	/*
-	 * make up a scsi command and ask the scsi driver to do
-	 * it for you.
-	 */
-	bzero(&scsi_cmd, sizeof(scsi_cmd));
-	scsi_cmd.opcode = READ_CAPACITY;
-
-	/*
-	 * If the command works, interpret the result as a 4 byte
-	 * number of blocks
-	 */
-	if (scsi_scsi_cmd(sd->sc_link, (struct scsi_generic *)&scsi_cmd,
-	    sizeof(scsi_cmd), (u_char *)&rdcap, sizeof(rdcap), SDRETRIES,
-	    2000, NULL, flags | SCSI_DATA_IN) != 0)
-		return 0;
-
-	size = (rdcap.addr_3 << 24) + (rdcap.addr_2 << 16) +
-	    (rdcap.addr_1 << 8) + rdcap.addr_0 + 1;
-
-	return size;
-}
-
 /*
  * Tell the device to map out a defective block
  */
 int
-sd_reassign_blocks(sd, block)
+sd_reassign_blocks(sd, blkno)
 	struct sd_softc *sd;
-	u_long block;
+	u_long blkno;
 {
 	struct scsi_reassign_blocks scsi_cmd;
 	struct scsi_reassign_blocks_data rbdata;
@@ -854,20 +813,14 @@ sd_reassign_blocks(sd, block)
 	bzero(&rbdata, sizeof(rbdata));
 	scsi_cmd.opcode = REASSIGN_BLOCKS;
 
-	rbdata.length_msb = 0;
-	rbdata.length_lsb = sizeof(rbdata.defect_descriptor[0]);
-	rbdata.defect_descriptor[0].dlbaddr_3 = (block >> 24) & 0xff;
-	rbdata.defect_descriptor[0].dlbaddr_2 = (block >> 16) & 0xff;
-	rbdata.defect_descriptor[0].dlbaddr_1 = (block >> 8) & 0xff;
-	rbdata.defect_descriptor[0].dlbaddr_0 = block & 0xff;
+	_lto2b(sizeof(rbdata.defect_descriptor[0]), rbdata.length);
+	_lto4b(blkno, rbdata.defect_descriptor[0].dlbaddr);
 
 	return scsi_scsi_cmd(sd->sc_link, (struct scsi_generic *)&scsi_cmd,
 	    sizeof(scsi_cmd), (u_char *)&rbdata, sizeof(rbdata), SDRETRIES,
 	    5000, NULL, SCSI_DATA_OUT);
 }
 
-#define b2tol(a)	(((unsigned)(a##_1) << 8) + (unsigned)a##_0 )
-
 /*
  * Get the scsi driver to send a full inquiry to the * device and use the
  * results to fill out the disk parameter structure.
@@ -908,7 +861,7 @@ sd_get_parms(sd, flags)
 		 * this depends on which controller (e.g. 1542C is
 		 * different. but we have to put SOMETHING here..)
 		 */
-		sectors = sd_size(sd, flags);
+		sectors = scsi_size(sd->sc_link, flags);
 		dp->heads = 64;
 		dp->sectors = 32;
 		dp->cyls = sectors / (64 * 32);
@@ -919,9 +872,9 @@ sd_get_parms(sd, flags)
 		    ("%d cyls, %d heads, %d precomp, %d red_write, %d land_zone\n",
 		    _3btol(&scsi_sense.pages.rigid_geometry.ncyl_2),
 		    scsi_sense.pages.rigid_geometry.nheads,
-		    b2tol(scsi_sense.pages.rigid_geometry.st_cyl_wp),
-		    b2tol(scsi_sense.pages.rigid_geometry.st_cyl_rwc),
-		    b2tol(scsi_sense.pages.rigid_geometry.land_zone)));
+		    _2btol(scsi_sense.pages.rigid_geometry.st_cyl_wp),
+		    _2btol(scsi_sense.pages.rigid_geometry.st_cyl_rwc),
+		    _2btol(scsi_sense.pages.rigid_geometry.land_zone)));
 
 		/*
 		 * KLUDGE!! (for zone recorded disks)
@@ -930,8 +883,7 @@ sd_get_parms(sd, flags)
 		 * can lead to wasted space! THINK ABOUT THIS !
 		 */
 		dp->heads = scsi_sense.pages.rigid_geometry.nheads;
-		dp->cyls =
-		    _3btol(&scsi_sense.pages.rigid_geometry.ncyl_2);
+		dp->cyls = _3btol(scsi_sense.pages.rigid_geometry.ncyl);
 		dp->blksize = _3btol(scsi_sense.blk_desc.blklen);
 
 		if (dp->heads == 0 || dp->cyls == 0) {
@@ -943,7 +895,7 @@ sd_get_parms(sd, flags)
 		if (dp->blksize == 0)
 			dp->blksize = 512;
 
-		sectors = sd_size(sd, flags);
+		sectors = scsi_size(sd->sc_link, flags);
 		dp->disksize = sectors;
 		sectors /= (dp->heads * dp->cyls);
 		dp->sectors = sectors;	/* XXX dubious on SCSI */
@@ -1047,12 +999,8 @@ sddump(dev, blkno, va, size)
 		 */
 		bzero(&cmd, sizeof(cmd));
 		cmd.opcode = WRITE_BIG;
-		cmd.addr_3 = (blkno >> 24) & 0xff;
-		cmd.addr_2 = (blkno >> 16) & 0xff;
-		cmd.addr_1 = (blkno >> 8) & 0xff;
-		cmd.addr_0 = blkno & 0xff;
-		cmd.length2 = (nwrt >> 8) & 0xff;
-		cmd.length1 = nwrt & 0xff;
+		_lto4b(blkno, cmd.addr);
+		_lto2b(nwrt, cmd.length);
 		/*
 		 * Fill out the scsi_xfer structure
 		 *    Note: we cannot sleep as we may be an interrupt
diff --git a/sys/scsi/ss_mustek.c b/sys/scsi/ss_mustek.c
index 7be6628fe01f..02249389039c 100644
--- a/sys/scsi/ss_mustek.c
+++ b/sys/scsi/ss_mustek.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: ss_mustek.c,v 1.1 1996/02/18 20:32:47 mycroft Exp $	*/
+/*	$NetBSD: ss_mustek.c,v 1.2 1996/03/19 03:05:15 mycroft Exp $	*/
 
 /*
  * Copyright (c) 1995 Joachim Koenig-Baltes.  All rights reserved.
@@ -277,9 +277,7 @@ mustek_trigger_scanner(ss)
 	struct mustek_set_window_data window_data;
 	struct mustek_start_scan_cmd start_scan_cmd;
 	struct scsi_link *sc_link = ss->sc_link;
-#ifndef MUSTEK_INCH_SPEC
 	int pixel_tlx, pixel_tly, pixel_brx, pixel_bry, paperlength;
-#endif
 	int error;
 
 	mustek_compute_sizes(ss);
@@ -294,46 +292,29 @@ mustek_trigger_scanner(ss)
 	window_cmd.length = sizeof(window_data);
 
 	bzero(&window_data, sizeof(window_data));
-	window_data.frame_header = MUSTEK_LINEART_BACKGROUND | MUSTEK_UNIT_SPEC;
+	window_data.frame.header = MUSTEK_LINEART_BACKGROUND | MUSTEK_UNIT_SPEC;
 #ifdef MUSTEK_INCH_SPEC
 	/* the positional values are all 1 byte because 256 / 8 = 32" */
-	window_data.frame_tl_x_0 = ss->sio.scan_x_origin / 150;
-	window_data.frame_tl_x_1 = 0;
-	window_data.frame_tl_y_0 = ss->sio.scan_y_origin / 150;
-	window_data.frame_tl_y_1 = 0;
-	window_data.frame_br_x_0 = (ss->sio.scan_x_origin +
-				    ss->sio.scan_width) / 150;
-	window_data.frame_br_x_1 = 0;
-	window_data.frame_br_y_0 = (ss->sio.scan_y_origin +
-				    ss->sio.scan_height) / 150;
-	window_data.frame_br_y_1 = 0;
+	pixel_tlx = ss->sio.scan_x_origin / 150;
+	pixel_tly = ss->sio.scan_y_origin / 150;
+	pixel_brx = pixel_tlx + ss->sio.scan_width / 150;
+	pixel_bry = pixel_tly + ss->sio.scan_height / 150;
 #else
 	pixel_tlx = (ss->sio.scan_x_origin * ss->sio.scan_x_resolution) / 1200;
-	window_data.frame_tl_x_0 = pixel_tlx & 0xff;
-	window_data.frame_tl_x_1 = (pixel_tlx >> 8) & 0xff;
 	pixel_tly = (ss->sio.scan_y_origin * ss->sio.scan_y_resolution) / 1200;
-	window_data.frame_tl_y_0 = pixel_tly & 0xff;
-	window_data.frame_tl_y_1 = (pixel_tly >> 8) & 0xff;
 	pixel_brx = pixel_tlx +
 	    (ss->sio.scan_width * ss->sio.scan_x_resolution) / 1200;
-	window_data.frame_br_x_0 = pixel_brx & 0xff;
-	window_data.frame_br_x_1 = (pixel_brx >> 8) & 0xff;
 	pixel_bry = pixel_tly +
 	    (ss->sio.scan_height * ss->sio.scan_y_resolution) / 1200;
-	window_data.frame_br_y_0 = pixel_bry & 0xff;
-	window_data.frame_br_y_1 = (pixel_bry >> 8) & 0xff;
 #endif
+	_lto2l(pixel_tlx, window_data.frame.tl_x);
+	_lto2l(pixel_tly, window_data.frame.tl_y);
+	_lto2l(pixel_brx, window_data.frame.br_x);
+	_lto2l(pixel_bry, window_data.frame.br_y);
 
 #if MUSTEK_WINDOWS >= 1
-	window_data.window1_header = MUSTEK_WINDOW_MASK | MUSTEK_UNIT_SPEC;
-	window_data.window1_tl_x_0 = window_data.frame_tl_x_0;
-	window_data.window1_tl_x_1 = window_data.frame_tl_x_1;
-	window_data.window1_tl_y_0 = window_data.frame_tl_y_0;
-	window_data.window1_tl_y_1 = window_data.frame_tl_y_1;
-	window_data.window1_br_x_0 = window_data.frame_br_x_0;
-	window_data.window1_br_x_1 = window_data.frame_br_x_1;
-	window_data.window1_br_y_0 = window_data.frame_br_y_0;
-	window_data.window1_br_y_1 = window_data.frame_br_y_1;
+	window_data.window1 = window_data.frame;
+	window_data.window1.header = MUSTEK_WINDOW_MASK | MUSTEK_UNIT_SPEC;
 #endif
 
 	/* send the set window command to the scanner */
@@ -349,7 +330,7 @@ mustek_trigger_scanner(ss)
 	 */
 	bzero(&mode_cmd, sizeof(mode_cmd));
 	mode_cmd.opcode = MUSTEK_MODE_SELECT;
-	mode_cmd.length_0 = sizeof(mode_data);
+	_lto2b(sizeof(mode_data), mode_cmd.length);
 
 	bzero(&mode_data, sizeof(mode_data));
 	mode_data.mode =
@@ -369,13 +350,11 @@ mustek_trigger_scanner(ss)
 	mode_data.grain = 0;
 	mode_data.velocity = ss->sio.scan_quality / 20 - 1;
 #ifdef MUSTEK_INCH_SPEC
-	mode_data.paperlength_0 = 14 * 8;	/* 14" */
-	mode_data.paperlength_1 = 0;
+	paperlength = 14 * 8;	/* 14" */
 #else
-	paperlength = 14 * ss->sio.scan_y_resolution; /* 14" */
-	mode_data.paperlength_0 = paperlength & 0xff;
-	mode_data.paperlength_1 = (paperlength >> 8) & 0xff;
+	paperlength = 14 * ss->sio.scan_y_resolution;	/* 14" */
 #endif
+	_lto2l(paperlength, mode_data.paperlength);
 
 	SC_DEBUG(sc_link, SDEV_DB1, ("mustek_trigger_scanner: mode_select\n"));
 	/* send the command to the scanner */
@@ -492,9 +471,7 @@ mustek_read(ss, bp)
 	    ((ss->sio.scan_pixels_per_line * ss->sio.scan_bits_per_pixel) / 8);
 	SC_DEBUG(sc_link, SDEV_DB1, ("mustek_read: read %d lines\n",
 	    lines_to_read));
-	cmd.length_0 = lines_to_read & 0xff;
-	cmd.length_1 = (lines_to_read >> 8) & 0xff;
-	cmd.length_2 = (lines_to_read >> 16) & 0xff;
+	_lto3b(lines_to_read, cmd.length);
 
 	/*
 	 * go ask the adapter to do all this for us
@@ -547,13 +524,8 @@ mustek_get_status(ss, timeout, update)
 	}
 
 	if (update) {
-		bytes_per_line =
-		    (data.bytes_per_line_1 << 8) |
-		    data.bytes_per_line_0;
-		lines =
-		    (data.lines_2 << 16) |
-		    (data.lines_1 << 8) |
-		    data.lines_0;
+		bytes_per_line = _2ltol(data.bytes_per_line);
+		lines = _3ltol(data.lines);
 		if (lines != ss->sio.scan_lines) {
 			printf("mustek: lines actual(%d) != computed(%d)\n",
 			    lines, ss->sio.scan_lines);
diff --git a/sys/scsi/ss_mustek.h b/sys/scsi/ss_mustek.h
index c045675077bd..599f129a06f2 100644
--- a/sys/scsi/ss_mustek.h
+++ b/sys/scsi/ss_mustek.h
@@ -1,4 +1,4 @@
-/*	$NetBSD: ss_mustek.h,v 1.1 1996/02/18 20:32:48 mycroft Exp $	*/
+/*	$NetBSD: ss_mustek.h,v 1.2 1996/03/19 03:05:15 mycroft Exp $	*/
 
 /*
  * Copyright (c) 1995 Joachim Koenig-Baltes.  All rights reserved.
@@ -70,104 +70,66 @@
  */
 
 struct mustek_set_window_cmd {
-	u_char	opcode;			/* 0x04 */
-	u_char	reserved[3];
-	u_char	length;			/* in bytes */
-	u_char	control;
+	u_int8_t opcode;		/* 0x04 */
+	u_int8_t reserved[3];
+	u_int8_t length;		/* in bytes */
+	u_int8_t control;
+};
+
+struct mustek_window {
+	u_int8_t header;		/* unit-defines also apply */
+	u_int8_t tl_x[2];		/* LSB */
+	u_int8_t tl_y[2];
+	u_int8_t br_x[2];
+	u_int8_t br_y[2];
 };
 
 struct mustek_set_window_data {
 #define MUSTEK_LINEART_BACKGROUND	0x00
 #define MUSTEK_HALFTONE_BACKGROUND	0x01
-	u_char	frame_header;		/* unit-defines also apply */
-	u_char	frame_tl_x_0;
-	u_char	frame_tl_x_1;
-	u_char	frame_tl_y_0;
-	u_char	frame_tl_y_1;
-	u_char	frame_br_x_0;
-	u_char	frame_br_x_1;
-	u_char	frame_br_y_0;
-	u_char	frame_br_y_1;
+	struct	mustek_window frame;
 #if MUSTEK_WINDOWS >= 1
 #define MUSTEK_WINDOW_MASK	0x80
-	u_char	window1_header;		/* unit-defines also apply */
-	u_char	window1_tl_x_0;
-	u_char	window1_tl_x_1;
-	u_char	window1_tl_y_0;
-	u_char	window1_tl_y_1;
-	u_char	window1_br_x_0;
-	u_char	window1_br_x_1;
-	u_char	window1_br_y_0;
-	u_char	window1_br_y_1;
+	struct	mustek_window window1;
 #endif
 #if MUSTEK_WINDOWS >= 2
-	u_char	window2_header;
-	u_char	window2_tl_x_0;
-	u_char	window2_tl_x_1;
-	u_char	window2_tl_y_0;
-	u_char	window2_tl_y_1;
-	u_char	window2_br_x_0;
-	u_char	window2_br_x_1;
-	u_char	window2_br_y_0;
-	u_char	window2_br_y_1;
+	struct	mustek_window window2;
 #endif
 #if MUSTEK_WINDOWS >= 3
-	u_char	window3_header;
-	u_char	window3_tl_x_0;
-	u_char	window3_tl_x_1;
-	u_char	window3_tl_y_0;
-	u_char	window3_tl_y_1;
-	u_char	window3_br_x_0;
-	u_char	window3_br_x_1;
-	u_char	window3_br_y_0;
-	u_char	window3_br_y_1;
+	struct	mustek_window window3;
 #endif
-#if MUSTEK_WINDOWS == 4
-	u_char	window4_header;
-	u_char	window4_tl_x_0;
-	u_char	window4_tl_x_1;
-	u_char	window4_tl_y_0;
-	u_char	window4_tl_y_1;
-	u_char	window4_br_x_0;
-	u_char	window4_br_x_1;
-	u_char	window4_br_y_0;
-	u_char	window4_br_y_1;
+#if MUSTEK_WINDOWS >= 4
+	struct	mustek_window window4;
 #endif
 };
 
 struct mustek_read_cmd {
-	u_char	opcode;			/* 0x08 */
-	u_char	reserved;
-	u_char	length_2;		/* number of LINES to be read (MSB) */
-	u_char	length_1;		/* number of LINES to be read */
-	u_char	length_0;		/* number of LINES to be read (LSB) */
-	u_char	control;
+	u_int8_t opcode;		/* 0x08 */
+	u_int8_t reserved;
+	u_int8_t length[3];
+	u_int8_t control;
 };
 
 struct mustek_get_status_cmd {
-	u_char	opcode;			/* 0x0f */
-	u_char	reserved[3];
-	u_char	length;			/* 0x06 */
-	u_char	control;
+	u_int8_t opcode;		/* 0x0f */
+	u_int8_t reserved[3];
+	u_int8_t length;		/* 0x06 */
+	u_int8_t control;
 };
 
 struct mustek_get_status_data {
 #define MUSTEK_READY 0
 #define MUSTEK_BUSY  -1	
-	u_char	ready_busy;		/* 0 = ready */
-	u_char	bytes_per_line_0;	/* LSB */
-	u_char	bytes_per_line_1;	/* MSB */
-	u_char	lines_0;		/* LSB */
-	u_char	lines_1;
-	u_char	lines_2;		/* MSB */
+	u_int8_t ready_busy;		/* 0 = ready */
+	u_int8_t bytes_per_line[2];	/* LSB */
+	u_int8_t lines[3];		/* LSB */
 };
 
 struct mustek_mode_select_cmd {
-	u_char	opcode;			/* 0x15 */
-	u_char	reserved[2];
-	u_char	length_1;		/* MSB */
-	u_char	length_0;		/* LSB */
-	u_char	control;
+	u_int8_t opcode;		/* 0x15 */
+	u_int8_t reserved[2];
+	u_int8_t length[2];
+	u_int8_t control;
 };
 
 /*
@@ -187,20 +149,19 @@ struct mustek_mode_select_data {
 #define MUSTEK_MODE_MASK		0x83
 #define MUSTEK_HT_PATTERN_BUILTIN	0x00
 #define MUSTEK_HT_PATTERN_DOWNLOADED	0x10
-	u_char	mode;
-	u_char	resolution;
-	u_char	brightness;
-	u_char	contrast;
-	u_char	grain;			/* 0 = 8x8, .....  5 = 2x2  */
-	u_char	velocity;		/* 0 = fast, ...., 4 = slow */
-	u_char	reserved[2];
-	u_char	paperlength_0;		/* LSB */
-	u_char	paperlength_1;		/* MSB */
+	u_int8_t mode;
+	u_int8_t resolution;
+	u_int8_t brightness;
+	u_int8_t contrast;
+	u_int8_t grain;			/* 0 = 8x8, .....  5 = 2x2  */
+	u_int8_t velocity;		/* 0 = fast, ...., 4 = slow */
+	u_int8_t reserved[2];
+	u_int8_t paperlength[2];	/* LSB */
 };
 
 struct mustek_start_scan_cmd {
-	u_char	opcode;			/* 0x1b */
-	u_char	reserved[3];
+	u_int8_t opcode;		/* 0x1b */
+	u_int8_t reserved[3];
 #define MUSTEK_SCAN_STOP	0x00
 #define MUSTEK_SCAN_START	0x01
 #define MUSTEK_GRAY_FILTER	0x00
@@ -211,8 +172,8 @@ struct mustek_start_scan_cmd {
 #define MUSTEK_BIT_MODE		0x00
 #define MUSTEK_RES_STEP_1	0x00
 #define MUSTEK_RES_STEP_10	0x80
-	u_char	mode;
-	u_char	control;
+	u_int8_t mode;
+	u_int8_t control;
 };
 
 #endif /* _SS_MUSTEK_H_ */
diff --git a/sys/scsi/ss_scanjet.c b/sys/scsi/ss_scanjet.c
index 4faebc78a75c..5e2fdd689a5c 100644
--- a/sys/scsi/ss_scanjet.c
+++ b/sys/scsi/ss_scanjet.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: ss_scanjet.c,v 1.1 1996/02/18 20:32:49 mycroft Exp $	*/
+/*	$NetBSD: ss_scanjet.c,v 1.2 1996/03/19 03:05:15 mycroft Exp $	*/
 
 /*
  * Copyright (c) 1995 Kenneth Stailey.  All rights reserved.
@@ -240,7 +240,7 @@ scanjet_read(ss, bp)
 	 * Handle "fixed-block-mode" tape drives by using the
 	 * block count instead of the length.
 	 */
-	lto3b(bp->b_bcount, cmd.len);
+	_lto3b(bp->b_bcount, cmd.len);
 
 	/*
 	 * go ask the adapter to do all this for us
@@ -278,7 +278,7 @@ scanjet_write(ss, buf, size, flags)
 		return (0);
 	bzero(&cmd, sizeof(cmd));
 	cmd.opcode = WRITE;
-	lto3b(size, cmd.len);
+	_lto3b(size, cmd.len);
 	return (scsi_scsi_cmd(ss->sc_link, (struct scsi_generic *) &cmd,
 	    sizeof(cmd), (u_char *) buf, size, 0, 100000, NULL,
 	    flags | SCSI_DATA_OUT));
diff --git a/sys/scsi/st.c b/sys/scsi/st.c
index 91e53ae1e67a..1982985952bd 100644
--- a/sys/scsi/st.c
+++ b/sys/scsi/st.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: st.c,v 1.63 1996/03/17 00:59:54 thorpej Exp $	*/
+/*	$NetBSD: st.c,v 1.64 1996/03/19 03:05:15 mycroft Exp $	*/
 
 /*
  * Copyright (c) 1994 Charles Hannum.  All rights reserved.
@@ -1005,9 +1005,9 @@ ststart(v)
 		 */
 		if (st->flags & ST_FIXEDBLOCKS) {
 			cmd.byte2 |= SRW_FIXED;
-			lto3b(bp->b_bcount / st->blksize, cmd.len);
+			_lto3b(bp->b_bcount / st->blksize, cmd.len);
 		} else
-			lto3b(bp->b_bcount, cmd.len);
+			_lto3b(bp->b_bcount, cmd.len);
 
 		/*
 		 * go ask the adapter to do all this for us
@@ -1254,21 +1254,15 @@ st_read(st, buf, size, flags)
 	cmd.opcode = READ;
 	if (st->flags & ST_FIXEDBLOCKS) {
 		cmd.byte2 |= SRW_FIXED;
-		lto3b(size / (st->blksize ? st->blksize : DEF_FIXED_BSIZE),
+		_lto3b(size / (st->blksize ? st->blksize : DEF_FIXED_BSIZE),
 		    cmd.len);
 	} else
-		lto3b(size, cmd.len);
+		_lto3b(size, cmd.len);
 	return scsi_scsi_cmd(st->sc_link, (struct scsi_generic *) &cmd,
 	    sizeof(cmd), (u_char *) buf, size, 0, 100000, NULL,
 	    flags | SCSI_DATA_IN);
 }
 
-#ifdef	__STDC__
-#define b2tol(a)	(((unsigned)(a##_1) << 8) + (unsigned)a##_0)
-#else
-#define b2tol(a)	(((unsigned)(a/**/_1) << 8) + (unsigned)a/**/_0)
-#endif
-
 /*
  * Ask the drive what it's min and max blk sizes are.
  */
@@ -1304,8 +1298,8 @@ st_read_block_limits(st, flags)
 	if (error)
 		return error;
 
-	st->blkmin = b2tol(block_limits.min_length);
-	st->blkmax = _3btol(&block_limits.max_length_2);
+	st->blkmin = _2btol(block_limits.min_length);
+	st->blkmax = _3btol(block_limits.max_length);
 
 	SC_DEBUG(sc_link, SDEV_DB3,
 	    ("(%d <= blksize <= %d)\n", st->blkmin, st->blkmax));
@@ -1413,7 +1407,7 @@ st_mode_select(st, flags)
 	else
 		scsi_select.header.dev_spec |= SMH_DSP_BUFF_MODE_ON;
 	if (st->flags & ST_FIXEDBLOCKS)
-		lto3b(st->blksize, scsi_select.blk_desc.blklen);
+		_lto3b(st->blksize, scsi_select.blk_desc.blklen);
 	if (st->page_0_size)
 		bcopy(st->sense_data, scsi_select.sense_data, st->page_0_size);
 
@@ -1531,7 +1525,7 @@ st_space(st, number, what, flags)
 	bzero(&cmd, sizeof(cmd));
 	cmd.opcode = SPACE;
 	cmd.byte2 = what;
-	lto3b(number, cmd.number);
+	_lto3b(number, cmd.number);
 
 	return scsi_scsi_cmd(st->sc_link, (struct scsi_generic *) &cmd,
 	    sizeof(cmd), 0, 0, 0, 900000, NULL, flags);
@@ -1570,7 +1564,7 @@ st_write_filemarks(st, number, flags)
 
 	bzero(&cmd, sizeof(cmd));
 	cmd.opcode = WRITE_FILEMARKS;
-	lto3b(number, cmd.number);
+	_lto3b(number, cmd.number);
 
 	return scsi_scsi_cmd(st->sc_link, (struct scsi_generic *) &cmd,
 	    sizeof(cmd), 0, 0, 0, 100000, NULL, flags);
@@ -1686,26 +1680,25 @@ st_interpret_sense(xs)
 	/*
 	 * Get the sense fields and work out what code
 	 */
-	if (sense->error_code & SSD_ERRCODE_VALID) {
-		bcopy(sense->extended_info, &info, sizeof info);
-		info = ntohl(info);
-	} else
+	if (sense->error_code & SSD_ERRCODE_VALID)
+		info = _4btol(sense->info);
+	else
 		info = xs->datalen;	/* bad choice if fixed blocks */
 	if ((sense->error_code & SSD_ERRCODE) != 0x70)
 		return -1;	/* let the generic code handle it */
 	if (st->flags & ST_FIXEDBLOCKS) {
 		xs->resid = info * st->blksize;
-		if (sense->extended_flags & SSD_EOM) {
+		if (sense->flags & SSD_EOM) {
 			st->flags |= ST_EIO_PENDING;
 			if (bp)
 				bp->b_resid = xs->resid;
 		}
-		if (sense->extended_flags & SSD_FILEMARK) {
+		if (sense->flags & SSD_FILEMARK) {
 			st->flags |= ST_AT_FILEMARK;
 			if (bp)
 				bp->b_resid = xs->resid;
 		}
-		if (sense->extended_flags & SSD_ILI) {
+		if (sense->flags & SSD_ILI) {
 			st->flags |= ST_EIO_PENDING;
 			if (bp)
 				bp->b_resid = xs->resid;
@@ -1739,14 +1732,14 @@ st_interpret_sense(xs)
 		}
 	} else {		/* must be variable mode */
 		xs->resid = xs->datalen;	/* to be sure */
-		if (sense->extended_flags & SSD_EOM)
+		if (sense->flags & SSD_EOM)
 			return EIO;
-		if (sense->extended_flags & SSD_FILEMARK) {
+		if (sense->flags & SSD_FILEMARK) {
 			if (bp)
 				bp->b_resid = bp->b_bcount;
 			return 0;
 		}
-		if (sense->extended_flags & SSD_ILI) {
+		if (sense->flags & SSD_ILI) {
 			if (info < 0) {
 				/*
 				 * the record was bigger than the read
@@ -1762,7 +1755,7 @@ st_interpret_sense(xs)
 				bp->b_resid = info;
 		}
 	}
-	key = sense->extended_flags & SSD_KEY;
+	key = sense->flags & SSD_KEY;
 
 	if (key == 0x8) {
 		/*