diff --git a/sys/arch/alpha/alpha/dec_3000_300.c b/sys/arch/alpha/alpha/dec_3000_300.c
index 059d15fa5f81..b8c1a4cff2da 100644
--- a/sys/arch/alpha/alpha/dec_3000_300.c
+++ b/sys/arch/alpha/alpha/dec_3000_300.c
@@ -1,4 +1,4 @@
-/* $NetBSD: dec_3000_300.c,v 1.26 1999/04/15 22:06:47 thorpej Exp $ */
+/* $NetBSD: dec_3000_300.c,v 1.27 1999/08/07 12:58:27 drochner Exp $ */
 
 /*
  * Copyright (c) 1995, 1996 Carnegie-Mellon University.
@@ -33,7 +33,7 @@
 
 #include <sys/cdefs.h>			/* RCS ID & Copyright macro defns */
 
-__KERNEL_RCSID(0, "$NetBSD: dec_3000_300.c,v 1.26 1999/04/15 22:06:47 thorpej Exp $");
+__KERNEL_RCSID(0, "$NetBSD: dec_3000_300.c,v 1.27 1999/08/07 12:58:27 drochner Exp $");
 
 #include "opt_new_scc_driver.h"
 
@@ -102,9 +102,9 @@ dec_3000_300_cons_init()
 	case CTB_GRAPHICS:
 #if NWSDISPLAY > 0
 		/* display console ... */
-		if (zs_ioasic_lk201_cnattach(0x1a0000000, 0x00180000, 0) &&
+		if (zs_ioasic_lk201_cnattach(0x1a0000000, 0x00180000, 0) == 0 &&
 		    tc_3000_300_fb_cnattach(
-		     CTB_TURBOSLOT_SLOT(ctb->ctb_turboslot))) {
+		     CTB_TURBOSLOT_SLOT(ctb->ctb_turboslot)) == 0) {
 			break;
 		}
 #endif
diff --git a/sys/arch/alpha/alpha/dec_3000_500.c b/sys/arch/alpha/alpha/dec_3000_500.c
index e61e833aad5a..769c6d42ec91 100644
--- a/sys/arch/alpha/alpha/dec_3000_500.c
+++ b/sys/arch/alpha/alpha/dec_3000_500.c
@@ -1,4 +1,4 @@
-/* $NetBSD: dec_3000_500.c,v 1.25 1999/04/15 22:06:47 thorpej Exp $ */
+/* $NetBSD: dec_3000_500.c,v 1.26 1999/08/07 12:58:28 drochner Exp $ */
 
 /*
  * Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University.
@@ -32,7 +32,7 @@
 
 #include <sys/cdefs.h>			/* RCS ID & Copyright macro defns */
 
-__KERNEL_RCSID(0, "$NetBSD: dec_3000_500.c,v 1.25 1999/04/15 22:06:47 thorpej Exp $");
+__KERNEL_RCSID(0, "$NetBSD: dec_3000_500.c,v 1.26 1999/08/07 12:58:28 drochner Exp $");
 
 #include "opt_new_scc_driver.h"
 
@@ -122,9 +122,9 @@ dec_3000_500_cons_init()
 	case CTB_GRAPHICS:
 #if NWSDISPLAY > 0
 		/* display console ... */
-		if (zs_ioasic_lk201_cnattach(0x1e0000000, 0x00180000, 0) &&
+		if (zs_ioasic_lk201_cnattach(0x1e0000000, 0x00180000, 0) == 0 &&
 		    tc_3000_500_fb_cnattach(
-		     CTB_TURBOSLOT_SLOT(ctb->ctb_turboslot))) {
+		     CTB_TURBOSLOT_SLOT(ctb->ctb_turboslot)) == 0) {
 			break;
 		}
 #endif
diff --git a/sys/arch/alpha/tc/tc_3000_300.c b/sys/arch/alpha/tc/tc_3000_300.c
index 7e1a8541cc5a..1df6ae24f1ad 100644
--- a/sys/arch/alpha/tc/tc_3000_300.c
+++ b/sys/arch/alpha/tc/tc_3000_300.c
@@ -1,4 +1,4 @@
-/* $NetBSD: tc_3000_300.c,v 1.19 1999/03/28 13:48:40 drochner Exp $ */
+/* $NetBSD: tc_3000_300.c,v 1.20 1999/08/07 12:58:29 drochner Exp $ */
 
 /*
  * Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University.
@@ -29,7 +29,7 @@
 
 #include <sys/cdefs.h>			/* RCS ID & Copyright macro defns */
 
-__KERNEL_RCSID(0, "$NetBSD: tc_3000_300.c,v 1.19 1999/03/28 13:48:40 drochner Exp $");
+__KERNEL_RCSID(0, "$NetBSD: tc_3000_300.c,v 1.20 1999/08/07 12:58:29 drochner Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -284,15 +284,15 @@ tc_3000_300_fb_cnattach(turbo_slot)
 	output_slot = turbo_slot & 0xffffffff;
 
 	if (output_slot >= tc_3000_300_nslots) {
-		return 0;
+		return EINVAL;
 	}
 
 	if (output_slot == 0) {
 #if NSFB > 0
 		sfb_cnattach(KV(0x1c0000000) + 0x02000000);
-		return 1;
-#else
 		return 0;
+#else
+		return ENXIO;
 #endif
 	}
 
diff --git a/sys/arch/alpha/tc/tc_3000_500.c b/sys/arch/alpha/tc/tc_3000_500.c
index 78416255f196..331f05529d7e 100644
--- a/sys/arch/alpha/tc/tc_3000_500.c
+++ b/sys/arch/alpha/tc/tc_3000_500.c
@@ -1,4 +1,4 @@
-/* $NetBSD: tc_3000_500.c,v 1.19 1999/03/28 13:48:40 drochner Exp $ */
+/* $NetBSD: tc_3000_500.c,v 1.20 1999/08/07 12:58:29 drochner Exp $ */
 
 /*
  * Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University.
@@ -29,7 +29,7 @@
 
 #include <sys/cdefs.h>			/* RCS ID & Copyright macro defns */
 
-__KERNEL_RCSID(0, "$NetBSD: tc_3000_500.c,v 1.19 1999/03/28 13:48:40 drochner Exp $");
+__KERNEL_RCSID(0, "$NetBSD: tc_3000_500.c,v 1.20 1999/08/07 12:58:29 drochner Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -284,16 +284,16 @@ tc_3000_500_fb_cnattach(turbo_slot)
 	output_slot = turbo_slot & 0xffffffff;
 
 	if (output_slot >= tc_3000_500_nslots) {
-		return 0;
+		return EINVAL;
 	}
 
 	if (hwrpb->rpb_variation & SV_GRAPHICS) {
 		if (output_slot == 0) {
 #if NSFB > 0
 			sfb_cnattach(KV(0x1e0000000) + 0x02000000);
-			return 1;
-#else
 			return 0;
+#else
+			return ENXIO;
 #endif
 		}
 	} else {
diff --git a/sys/arch/alpha/tc/tcasic.c b/sys/arch/alpha/tc/tcasic.c
index 4a281282751e..c291ab8a3895 100644
--- a/sys/arch/alpha/tc/tcasic.c
+++ b/sys/arch/alpha/tc/tcasic.c
@@ -1,4 +1,4 @@
-/* $NetBSD: tcasic.c,v 1.26 1999/04/10 01:21:38 cgd Exp $ */
+/* $NetBSD: tcasic.c,v 1.27 1999/08/07 12:58:29 drochner Exp $ */
 
 /*
  * Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University.
@@ -32,7 +32,7 @@
 
 #include <sys/cdefs.h>			/* RCS ID & Copyright macro defns */
 
-__KERNEL_RCSID(0, "$NetBSD: tcasic.c,v 1.26 1999/04/10 01:21:38 cgd Exp $");
+__KERNEL_RCSID(0, "$NetBSD: tcasic.c,v 1.27 1999/08/07 12:58:29 drochner Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -189,21 +189,21 @@ tc_fb_cnattach(tcaddr)
 	char tcname[TC_ROM_LLEN];
 
 	if (tc_badaddr(tcaddr) || (tc_checkslot(tcaddr, tcname) == 0)) {
-		return 0;
+		return EINVAL;
 	}
 
 #if NSFB > 0
 	if (strncmp("PMAGB-BA", tcname, TC_ROM_LLEN) == 0) {
 		sfb_cnattach(tcaddr);
-		return 1;
+		return 0;
 	}
 #endif
 #if NCFB > 0
 	if (strncmp("PMAG-BA ", tcname, TC_ROM_LLEN) == 0) {
 		cfb_cnattach(tcaddr);
-		return 1;
+		return 0;
 	}
 #endif
-	return 0;
+	return ENXIO;
 }
 #endif /* if NWSDISPLAY > 0 */
diff --git a/sys/arch/alpha/tc/zs_ioasic.c b/sys/arch/alpha/tc/zs_ioasic.c
index dbc9649bb6fd..ad63f53b131a 100644
--- a/sys/arch/alpha/tc/zs_ioasic.c
+++ b/sys/arch/alpha/tc/zs_ioasic.c
@@ -1,4 +1,4 @@
-/* $NetBSD: zs_ioasic.c,v 1.6 1999/08/03 05:30:56 nisimura Exp $ */
+/* $NetBSD: zs_ioasic.c,v 1.7 1999/08/07 12:58:30 drochner Exp $ */
 
 /*-
  * Copyright (c) 1996, 1998 The NetBSD Foundation, Inc.
@@ -39,7 +39,7 @@
 
 #include <sys/cdefs.h>			/* RCS ID & Copyright macro defns */
 
-__KERNEL_RCSID(0, "$NetBSD: zs_ioasic.c,v 1.6 1999/08/03 05:30:56 nisimura Exp $");
+__KERNEL_RCSID(0, "$NetBSD: zs_ioasic.c,v 1.7 1999/08/07 12:58:30 drochner Exp $");
 
 /*
  * Zilog Z8530 Dual UART driver (machine-dependent part).  This driver
@@ -819,10 +819,9 @@ zs_ioasic_lk201_cnattach(ioasic_addr, zs_offset, channel)
 	zs_ioasic_conschanstate->cs_defcflag =
 	     (TTYDEF_CFLAG & ~(CSIZE | PARENB)) | CS8;
 	zs_ioasic_conschanstate->cs_brg_clk = PCLK / 16;
-	zskbd_cnattach(zs_ioasic_conschanstate);
-	return (1);
+	return (zskbd_cnattach(zs_ioasic_conschanstate));
 #else
-	return (0);
+	return (ENXIO);
 #endif
 }