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; $OpenBSD: siop_script.ss,v 1.2 1997/01/16 09:25:29 niklas Exp $
; $NetBSD: siop_script.ss,v 1.3 1995/08/18 15:28:11 chopps Exp $
;
; Copyright (c) 1995 Michael L. Hitch
; All rights reserved.
;
; Redistribution and use in source and binary forms, with or without
; modification, are permitted provided that the following conditions
; are met:
; 1. Redistributions of source code must retain the above copyright
; notice, this list of conditions and the following disclaimer.
; 2. Redistributions in binary form must reproduce the above copyright
; notice, this list of conditions and the following disclaimer in the
; documentation and/or other materials provided with the distribution.
; 3. All advertising materials mentioning features or use of this software
; must display the following acknowledgement:
; This product includes software developed by Michael L. Hitch.
; 4. The name of the author may not be used to endorse or promote products
; derived from this software without specific prior written permission
;
; THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
; IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
; OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
; IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
; INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
; NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
; DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
; THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
; (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
; THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
;
; NCR 53c710 script
;
ABSOLUTE ds_Device = 0
ABSOLUTE ds_MsgOut = ds_Device + 4
ABSOLUTE ds_Cmd = ds_MsgOut + 8
ABSOLUTE ds_Status = ds_Cmd + 8
ABSOLUTE ds_Msg = ds_Status + 8
ABSOLUTE ds_MsgIn = ds_Msg + 8
ABSOLUTE ds_ExtMsg = ds_MsgIn + 8
ABSOLUTE ds_SyncMsg = ds_ExtMsg + 8
ABSOLUTE ds_Data1 = ds_SyncMsg + 8
ABSOLUTE ds_Data2 = ds_Data1 + 8
ABSOLUTE ds_Data3 = ds_Data2 + 8
ABSOLUTE ds_Data4 = ds_Data3 + 8
ABSOLUTE ds_Data5 = ds_Data4 + 8
ABSOLUTE ds_Data6 = ds_Data5 + 8
ABSOLUTE ds_Data7 = ds_Data6 + 8
ABSOLUTE ds_Data8 = ds_Data7 + 8
ABSOLUTE ds_Data9 = ds_Data8 + 8
ABSOLUTE ok = 0xff00
ABSOLUTE err1 = 0xff01
ABSOLUTE err2 = 0xff02
ABSOLUTE err3 = 0xff03
ABSOLUTE err4 = 0xff04
ABSOLUTE err5 = 0xff05
ABSOLUTE err6 = 0xff06
ABSOLUTE err7 = 0xff07
ABSOLUTE err8 = 0xff08
ABSOLUTE err9 = 0xff09
ABSOLUTE err10 = 0xff0a
ENTRY scripts
ENTRY switch
ENTRY wait_reselect
ENTRY dataout
ENTRY datain
PROC scripts:
scripts:
SELECT ATN FROM ds_Device, REL(reselect)
;
switch:
JUMP REL(msgin), WHEN MSG_IN
JUMP REL(msgout), IF MSG_OUT
JUMP REL(command_phase), IF CMD
JUMP REL(dataout), IF DATA_OUT
JUMP REL(datain), IF DATA_IN
JUMP REL(end), IF STATUS
INT err5 ; Unrecognized phase
msgin:
MOVE FROM ds_MsgIn, WHEN MSG_IN
JUMP REL(ext_msg), IF 0x01 ; extended message
JUMP REL(disc), IF 0x04 ; disconnect message
JUMP REL(msg_sdp), IF 0x02 ; save data pointers
JUMP REL(msg_rej), IF 0x07 ; message reject
JUMP REL(msg_rdp), IF 0x03 ; restore data pointers
INT err6 ; unrecognized message
msg_rdp:
msg_rej:
CLEAR ACK
CLEAR ATN
JUMP REL(switch)
ext_msg:
CLEAR ACK
MOVE FROM ds_ExtMsg, WHEN MSG_IN
JUMP REL(sync_msg), IF 0x03
int err7 ; extended message not SDTR
sync_msg:
CLEAR ACK
MOVE FROM ds_SyncMsg, WHEN MSG_IN
CLEAR ACK
JUMP REL(switch)
disc:
CLEAR ACK
WAIT DISCONNECT
int err2 ; signal disconnect w/o save DP
msg_sdp:
CLEAR ACK ; acknowledge message
JUMP REL(switch), WHEN NOT MSG_IN
MOVE FROM ds_ExtMsg, WHEN MSG_IN
INT err8, IF NOT 0x04 ; interrupt if not disconnect
CLEAR ACK
WAIT DISCONNECT
INT err1 ; signal disconnect
reselect:
wait_reselect:
WAIT RESELECT REL(select_adr)
MOVE LCRC to SFBR ; Save reselect ID
MOVE SFBR to SCRATCH0
INT err9, WHEN NOT MSG_IN ; didn't get IDENTIFY
MOVE FROM ds_Msg, WHEN MSG_IN
INT err3 ; let host know about reconnect
CLEAR ACK ; acknowlege the message
JUMP REL(switch)
select_adr:
MOVE SCNTL1 & 0x10 to SFBR ; get connected status
INT err4, IF 0x00 ; tell host if not connected
MOVE CTEST2 & 0x40 to SFBR ; clear Sig_P
JUMP REL(wait_reselect) ; and try reselect again
msgout:
MOVE FROM ds_MsgOut, WHEN MSG_OUT
JUMP REL(switch)
command_phase:
CLEAR ATN
MOVE FROM ds_Cmd, WHEN CMD
JUMP REL(switch)
dataout:
MOVE FROM ds_Data1, WHEN DATA_OUT
CALL REL(switch), WHEN NOT DATA_OUT
MOVE FROM ds_Data2, WHEN DATA_OUT
CALL REL(switch), WHEN NOT DATA_OUT
MOVE FROM ds_Data3, WHEN DATA_OUT
CALL REL(switch), WHEN NOT DATA_OUT
MOVE FROM ds_Data4, WHEN DATA_OUT
CALL REL(switch), WHEN NOT DATA_OUT
MOVE FROM ds_Data5, WHEN DATA_OUT
CALL REL(switch), WHEN NOT DATA_OUT
MOVE FROM ds_Data6, WHEN DATA_OUT
CALL REL(switch), WHEN NOT DATA_OUT
MOVE FROM ds_Data7, WHEN DATA_OUT
CALL REL(switch), WHEN NOT DATA_OUT
MOVE FROM ds_Data8, WHEN DATA_OUT
CALL REL(switch), WHEN NOT DATA_OUT
MOVE FROM ds_Data9, WHEN DATA_OUT
CALL REL(switch)
datain:
MOVE FROM ds_Data1, WHEN DATA_IN
CALL REL(switch), WHEN NOT DATA_IN
MOVE FROM ds_Data2, WHEN DATA_IN
CALL REL(switch), WHEN NOT DATA_IN
MOVE FROM ds_Data3, WHEN DATA_IN
CALL REL(switch), WHEN NOT DATA_IN
MOVE FROM ds_Data4, WHEN DATA_IN
CALL REL(switch), WHEN NOT DATA_IN
MOVE FROM ds_Data5, WHEN DATA_IN
CALL REL(switch), WHEN NOT DATA_IN
MOVE FROM ds_Data6, WHEN DATA_IN
CALL REL(switch), WHEN NOT DATA_IN
MOVE FROM ds_Data7, WHEN DATA_IN
CALL REL(switch), WHEN NOT DATA_IN
MOVE FROM ds_Data8, WHEN DATA_IN
CALL REL(switch), WHEN NOT DATA_IN
MOVE FROM ds_Data9, WHEN DATA_IN
CALL REL(switch)
end:
MOVE FROM ds_Status, WHEN STATUS
int err10, WHEN NOT MSG_IN ; status not followed by msg
MOVE FROM ds_Msg, WHEN MSG_IN
CLEAR ACK
WAIT DISCONNECT
INT ok ; signal completion
JUMP REL(wait_reselect)
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