220 lines
6.3 KiB
Scheme
220 lines
6.3 KiB
Scheme
; $NetBSD: siop2_script.ss,v 1.3 1999/03/26 22:50:23 mhitch Exp $
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;
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; Copyright (c) 1998 Michael L. Hitch
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; All rights reserved.
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;
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; Redistribution and use in source and binary forms, with or without
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; modification, are permitted provided that the following conditions
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; are met:
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; 1. Redistributions of source code must retain the above copyright
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; notice, this list of conditions and the following disclaimer.
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; 2. Redistributions in binary form must reproduce the above copyright
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; notice, this list of conditions and the following disclaimer in the
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; documentation and/or other materials provided with the distribution.
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; 3. All advertising materials mentioning features or use of this software
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; must display the following acknowledgement:
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; This product includes software developed by Michael L. Hitch.
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; 4. The name of the author may not be used to endorse or promote products
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; derived from this software without specific prior written permission
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;
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; THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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; IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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; OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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; IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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; INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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; NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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; DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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; THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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; (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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; THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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;
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; NCR 53c770 script
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;
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ARCH 720
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;
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ABSOLUTE ds_Device = 0
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ABSOLUTE ds_MsgOut = ds_Device + 4
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ABSOLUTE ds_Cmd = ds_MsgOut + 8
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ABSOLUTE ds_Status = ds_Cmd + 8
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ABSOLUTE ds_Msg = ds_Status + 8
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ABSOLUTE ds_MsgIn = ds_Msg + 8
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ABSOLUTE ds_ExtMsg = ds_MsgIn + 8
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ABSOLUTE ds_NegMsg = ds_ExtMsg + 8
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ABSOLUTE ds_Data1 = ds_NegMsg + 8
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ABSOLUTE ds_Data2 = ds_Data1 + 8
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ABSOLUTE ds_Data3 = ds_Data2 + 8
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ABSOLUTE ds_Data4 = ds_Data3 + 8
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ABSOLUTE ds_Data5 = ds_Data4 + 8
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ABSOLUTE ds_Data6 = ds_Data5 + 8
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ABSOLUTE ds_Data7 = ds_Data6 + 8
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ABSOLUTE ds_Data8 = ds_Data7 + 8
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ABSOLUTE ds_Data9 = ds_Data8 + 8
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ABSOLUTE ok = 0xff00
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ABSOLUTE err1 = 0xff01
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ABSOLUTE err2 = 0xff02
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ABSOLUTE err3 = 0xff03
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ABSOLUTE err4 = 0xff04
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ABSOLUTE err5 = 0xff05
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ABSOLUTE err6 = 0xff06
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ABSOLUTE err7 = 0xff07
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ABSOLUTE err8 = 0xff08
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ABSOLUTE err9 = 0xff09
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ABSOLUTE err10 = 0xff0a
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ABSOLUTE err11 = 0xff0b
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ENTRY scripts
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ENTRY switch
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ENTRY wait_reselect
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ENTRY dataout
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ENTRY datain
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ENTRY clear_ack
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PROC siopng_scripts:
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scripts:
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SELECT ATN FROM ds_Device, REL(reselect)
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;
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switch:
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JUMP REL(msgin), WHEN MSG_IN
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JUMP REL(msgout), IF MSG_OUT
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JUMP REL(command_phase), IF CMD
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JUMP REL(dataout), IF DATA_OUT
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JUMP REL(datain), IF DATA_IN
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JUMP REL(end), IF STATUS
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INT err5 ; Unrecognized phase
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msgin:
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MOVE FROM ds_MsgIn, WHEN MSG_IN
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JUMP REL(ext_msg), IF 0x01 ; extended message
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JUMP REL(disc), IF 0x04 ; disconnect message
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JUMP REL(msg_sdp), IF 0x02 ; save data pointers
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JUMP REL(msg_rej), IF 0x07 ; message reject
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JUMP REL(msg_rdp), IF 0x03 ; restore data pointers
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INT err6 ; unrecognized message
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msg_rej:
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; Do we need to interrupt host here to let it handle the reject?
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msg_rdp:
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clear_ack:
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CLEAR ACK
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CLEAR ATN
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JUMP REL(switch)
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ext_msg:
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CLEAR ACK
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MOVE FROM ds_ExtMsg, WHEN MSG_IN
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JUMP REL(neg_msg), IF 0x03 ; extended message might be SDTR
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JUMP REL(neg_msg), IF 0x02 ; extended message might be WDTR
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int err7 ; extended message not SDTR
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neg_msg:
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CLEAR ACK
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MOVE FROM ds_NegMsg, WHEN MSG_IN
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int err11 ; Let host handle the message
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; If we continue from the interrupt, the host has set up a response
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; message to be sent. Set ATN, clear ACK, and continue.
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SET ATN
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CLEAR ACK
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JUMP REL(switch)
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disc:
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MOVE SCNTL2 & 0x7f TO SCNTL2
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CLEAR ACK
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WAIT DISCONNECT
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int err2 ; signal disconnect w/o save DP
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msg_sdp:
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CLEAR ACK ; acknowledge message
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JUMP REL(switch), WHEN NOT MSG_IN
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MOVE FROM ds_ExtMsg, WHEN MSG_IN
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INT err8, IF NOT 0x04 ; interrupt if not disconnect
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MOVE SCNTL2 & 0x7f TO SCNTL2
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CLEAR ACK
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WAIT DISCONNECT
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INT err1 ; signal disconnect
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reselect:
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wait_reselect:
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WAIT RESELECT REL(select_adr)
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MOVE SSID & 0x8f to SFBR ; Save reselect ID
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MOVE SFBR to SCRATCHA0
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INT err9, WHEN NOT MSG_IN ; didn't get IDENTIFY
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MOVE FROM ds_Msg, WHEN MSG_IN
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INT err3 ; let host know about reconnect
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CLEAR ACK ; acknowlege the message
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JUMP REL(switch)
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select_adr:
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MOVE SCNTL1 & 0x10 to SFBR ; get connected status
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INT err4, IF 0x00 ; tell host if not connected
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MOVE CTEST2 & 0x40 to SFBR ; clear Sig_P
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JUMP REL(wait_reselect) ; and try reselect again
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msgout:
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MOVE FROM ds_MsgOut, WHEN MSG_OUT
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JUMP REL(switch)
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command_phase:
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CLEAR ATN
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MOVE FROM ds_Cmd, WHEN CMD
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JUMP REL(switch)
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dataout:
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MOVE FROM ds_Data1, WHEN DATA_OUT
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CALL REL(switch), WHEN NOT DATA_OUT
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MOVE FROM ds_Data2, WHEN DATA_OUT
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CALL REL(switch), WHEN NOT DATA_OUT
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MOVE FROM ds_Data3, WHEN DATA_OUT
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CALL REL(switch), WHEN NOT DATA_OUT
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MOVE FROM ds_Data4, WHEN DATA_OUT
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CALL REL(switch), WHEN NOT DATA_OUT
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MOVE FROM ds_Data5, WHEN DATA_OUT
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CALL REL(switch), WHEN NOT DATA_OUT
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MOVE FROM ds_Data6, WHEN DATA_OUT
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CALL REL(switch), WHEN NOT DATA_OUT
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MOVE FROM ds_Data7, WHEN DATA_OUT
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CALL REL(switch), WHEN NOT DATA_OUT
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MOVE FROM ds_Data8, WHEN DATA_OUT
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CALL REL(switch), WHEN NOT DATA_OUT
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MOVE FROM ds_Data9, WHEN DATA_OUT
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CALL REL(switch)
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datain:
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MOVE FROM ds_Data1, WHEN DATA_IN
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CALL REL(switch), WHEN NOT DATA_IN
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MOVE FROM ds_Data2, WHEN DATA_IN
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CALL REL(switch), WHEN NOT DATA_IN
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MOVE FROM ds_Data3, WHEN DATA_IN
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CALL REL(switch), WHEN NOT DATA_IN
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MOVE FROM ds_Data4, WHEN DATA_IN
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CALL REL(switch), WHEN NOT DATA_IN
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MOVE FROM ds_Data5, WHEN DATA_IN
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CALL REL(switch), WHEN NOT DATA_IN
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MOVE FROM ds_Data6, WHEN DATA_IN
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CALL REL(switch), WHEN NOT DATA_IN
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MOVE FROM ds_Data7, WHEN DATA_IN
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CALL REL(switch), WHEN NOT DATA_IN
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MOVE FROM ds_Data8, WHEN DATA_IN
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CALL REL(switch), WHEN NOT DATA_IN
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MOVE FROM ds_Data9, WHEN DATA_IN
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CALL REL(switch)
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end:
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MOVE FROM ds_Status, WHEN STATUS
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int err10, WHEN NOT MSG_IN ; status not followed by msg
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MOVE FROM ds_Msg, WHEN MSG_IN
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MOVE SCNTL2 & 0x7f TO SCNTL2
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CLEAR ACK
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WAIT DISCONNECT
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INT ok ; signal completion
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JUMP REL(wait_reselect)
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