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; $NetBSD: oosiop.ss,v 1.1 2001/12/05 18:27:13 fredette Exp $
;
; Copyright (c) 2001 Matt Fredette
; 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 53c700 script
;
ARCH 700
;
EXTERNAL ds_Device
EXTERNAL ds_MsgOut
EXTERNAL ds_Cmd
EXTERNAL ds_Status
EXTERNAL ds_Msg
EXTERNAL ds_MsgIn
EXTERNAL ds_ExtMsg
EXTERNAL ds_SyncMsg
EXTERNAL ds_Data1
ABSOLUTE ok = 0xff00
ABSOLUTE int_disc = 0xff01
ABSOLUTE int_disc_wodp = 0xff02
ABSOLUTE int_reconnect = 0xff03
ABSOLUTE int_connect = 0xff04
ABSOLUTE int_phase = 0xff05
ABSOLUTE int_msgin = 0xff06
ABSOLUTE int_extmsg = 0xff07
ABSOLUTE int_msgsdp = 0xff08
ABSOLUTE int_identify = 0xff09
ABSOLUTE int_status = 0xff0a
ABSOLUTE int_syncmsg = 0xff0b
ENTRY scripts
ENTRY switch
ENTRY wait_reselect
ENTRY dataout
ENTRY datain
ENTRY clear_ack
PROC oosiop_script:
scripts:
SELECT ATN ds_Device, reselect
;
switch:
JUMP msgin, WHEN MSG_IN
JUMP msgout, IF MSG_OUT
JUMP command_phase, IF CMD
JUMP dataout, IF DATA_OUT
JUMP datain, IF DATA_IN
JUMP end, IF STATUS
INT int_phase ; Unrecognized phase
msgin:
MOVE 0, ds_MsgIn, WHEN MSG_IN
JUMP ext_msg, IF 0x01 ; extended message
JUMP disc, IF 0x04 ; disconnect message
JUMP msg_sdp, IF 0x02 ; save data pointers
JUMP msg_rej, IF 0x07 ; message reject
JUMP msg_rdp, IF 0x03 ; restore data pointers
INT int_msgin ; unrecognized message
msg_rej:
; Do we need to interrupt host here to let it handle the reject?
msg_rdp:
clear_ack:
CLEAR ACK
CLEAR ATN
JUMP switch
ext_msg:
CLEAR ACK
MOVE 0, ds_ExtMsg, WHEN MSG_IN
JUMP sync_msg, IF 0x03
int int_extmsg ; extended message not SDTR
sync_msg:
CLEAR ACK
MOVE 0, ds_SyncMsg, WHEN MSG_IN
int int_syncmsg ; Let host handle the message
; If we continue from the interrupt, the host has set up a response
; message to be sent. Set ATN, clear ACK, and continue.
SET ATN
CLEAR ACK
JUMP switch
disc:
CLEAR ACK
WAIT DISCONNECT
int int_disc_wodp ; signal disconnect w/o save DP
msg_sdp:
CLEAR ACK ; acknowledge message
JUMP switch, WHEN NOT MSG_IN
MOVE 0, ds_ExtMsg, WHEN MSG_IN
INT int_msgsdp, IF NOT 0x04 ; interrupt if not disconnect
CLEAR ACK
WAIT DISCONNECT
INT int_disc ; signal disconnect
reselect:
wait_reselect:
WAIT RESELECT select_adr
; NB: these NOPs are CRITICAL to preserve the 1:1
; correspondence between instructions in this script
; and instructions in the osiop (53c710) script:
NOP
NOP ; reselect ID already in SFBR
INT int_identify, WHEN NOT MSG_IN
MOVE 0, ds_Msg, WHEN MSG_IN
INT int_reconnect ; let host know about reconnect
CLEAR ACK ; acknowlege the message
JUMP switch
select_adr:
MOVE SCNTL1 & 0x10 to SFBR ; get connected status
INT int_connect, IF 0x00 ; tell host if not connected
NOP ; Sig_P doesn't exist on the 53c700
JUMP wait_reselect ; and try reselect again
msgout:
MOVE 0, ds_MsgOut, WHEN MSG_OUT
JUMP switch
command_phase:
CLEAR ATN
MOVE 0, ds_Cmd, WHEN CMD
JUMP switch
dataout:
MOVE 0, ds_Data1, WHEN DATA_OUT
CALL switch, WHEN NOT DATA_OUT
MOVE 0, ds_Data1, WHEN DATA_OUT
CALL switch, WHEN NOT DATA_OUT
MOVE 0, ds_Data1, WHEN DATA_OUT
CALL switch, WHEN NOT DATA_OUT
MOVE 0, ds_Data1, WHEN DATA_OUT
CALL switch, WHEN NOT DATA_OUT
MOVE 0, ds_Data1, WHEN DATA_OUT
CALL switch, WHEN NOT DATA_OUT
MOVE 0, ds_Data1, WHEN DATA_OUT
CALL switch, WHEN NOT DATA_OUT
MOVE 0, ds_Data1, WHEN DATA_OUT
CALL switch, WHEN NOT DATA_OUT
MOVE 0, ds_Data1, WHEN DATA_OUT
CALL switch, WHEN NOT DATA_OUT
MOVE 0, ds_Data1, WHEN DATA_OUT
CALL switch, WHEN NOT DATA_OUT
MOVE 0, ds_Data1, WHEN DATA_OUT
CALL switch, WHEN NOT DATA_OUT
MOVE 0, ds_Data1, WHEN DATA_OUT
CALL switch, WHEN NOT DATA_OUT
MOVE 0, ds_Data1, WHEN DATA_OUT
CALL switch, WHEN NOT DATA_OUT
MOVE 0, ds_Data1, WHEN DATA_OUT
CALL switch, WHEN NOT DATA_OUT
MOVE 0, ds_Data1, WHEN DATA_OUT
CALL switch, WHEN NOT DATA_OUT
MOVE 0, ds_Data1, WHEN DATA_OUT
CALL switch, WHEN NOT DATA_OUT
MOVE 0, ds_Data1, WHEN DATA_OUT
CALL switch, WHEN NOT DATA_OUT
MOVE 0, ds_Data1, WHEN DATA_OUT
CALL switch
datain:
MOVE 0, ds_Data1, WHEN DATA_IN
CALL switch, WHEN NOT DATA_IN
MOVE 0, ds_Data1, WHEN DATA_IN
CALL switch, WHEN NOT DATA_IN
MOVE 0, ds_Data1, WHEN DATA_IN
CALL switch, WHEN NOT DATA_IN
MOVE 0, ds_Data1, WHEN DATA_IN
CALL switch, WHEN NOT DATA_IN
MOVE 0, ds_Data1, WHEN DATA_IN
CALL switch, WHEN NOT DATA_IN
MOVE 0, ds_Data1, WHEN DATA_IN
CALL switch, WHEN NOT DATA_IN
MOVE 0, ds_Data1, WHEN DATA_IN
CALL switch, WHEN NOT DATA_IN
MOVE 0, ds_Data1, WHEN DATA_IN
CALL switch, WHEN NOT DATA_IN
MOVE 0, ds_Data1, WHEN DATA_IN
CALL switch, WHEN NOT DATA_IN
MOVE 0, ds_Data1, WHEN DATA_IN
CALL switch, WHEN NOT DATA_IN
MOVE 0, ds_Data1, WHEN DATA_IN
CALL switch, WHEN NOT DATA_IN
MOVE 0, ds_Data1, WHEN DATA_IN
CALL switch, WHEN NOT DATA_IN
MOVE 0, ds_Data1, WHEN DATA_IN
CALL switch, WHEN NOT DATA_IN
MOVE 0, ds_Data1, WHEN DATA_IN
CALL switch, WHEN NOT DATA_IN
MOVE 0, ds_Data1, WHEN DATA_IN
CALL switch, WHEN NOT DATA_IN
MOVE 0, ds_Data1, WHEN DATA_IN
CALL switch, WHEN NOT DATA_IN
MOVE 0, ds_Data1, WHEN DATA_IN
CALL switch
end:
MOVE 0, ds_Status, WHEN STATUS
int int_status, WHEN NOT MSG_IN ; status not followed by msg
MOVE 0, ds_Msg, WHEN MSG_IN
CLEAR ACK
WAIT DISCONNECT
INT ok ; signal completion
JUMP wait_reselect
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