244 lines
6.7 KiB
Scheme
244 lines
6.7 KiB
Scheme
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; $NetBSD: oosiop.ss,v 1.1 2001/12/05 18:27:13 fredette Exp $
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;
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; Copyright (c) 2001 Matt Fredette
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; Copyright (c) 1995 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 53c700 script
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;
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ARCH 700
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;
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EXTERNAL ds_Device
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EXTERNAL ds_MsgOut
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EXTERNAL ds_Cmd
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EXTERNAL ds_Status
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EXTERNAL ds_Msg
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EXTERNAL ds_MsgIn
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EXTERNAL ds_ExtMsg
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EXTERNAL ds_SyncMsg
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EXTERNAL ds_Data1
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ABSOLUTE ok = 0xff00
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ABSOLUTE int_disc = 0xff01
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ABSOLUTE int_disc_wodp = 0xff02
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ABSOLUTE int_reconnect = 0xff03
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ABSOLUTE int_connect = 0xff04
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ABSOLUTE int_phase = 0xff05
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ABSOLUTE int_msgin = 0xff06
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ABSOLUTE int_extmsg = 0xff07
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ABSOLUTE int_msgsdp = 0xff08
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ABSOLUTE int_identify = 0xff09
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ABSOLUTE int_status = 0xff0a
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ABSOLUTE int_syncmsg = 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 oosiop_script:
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scripts:
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SELECT ATN ds_Device, reselect
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;
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switch:
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JUMP msgin, WHEN MSG_IN
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JUMP msgout, IF MSG_OUT
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JUMP command_phase, IF CMD
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JUMP dataout, IF DATA_OUT
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JUMP datain, IF DATA_IN
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JUMP end, IF STATUS
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INT int_phase ; Unrecognized phase
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msgin:
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MOVE 0, ds_MsgIn, WHEN MSG_IN
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JUMP ext_msg, IF 0x01 ; extended message
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JUMP disc, IF 0x04 ; disconnect message
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JUMP msg_sdp, IF 0x02 ; save data pointers
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JUMP msg_rej, IF 0x07 ; message reject
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JUMP msg_rdp, IF 0x03 ; restore data pointers
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INT int_msgin ; 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 switch
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ext_msg:
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CLEAR ACK
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MOVE 0, ds_ExtMsg, WHEN MSG_IN
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JUMP sync_msg, IF 0x03
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int int_extmsg ; extended message not SDTR
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sync_msg:
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CLEAR ACK
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MOVE 0, ds_SyncMsg, WHEN MSG_IN
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int int_syncmsg ; 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 switch
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disc:
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CLEAR ACK
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WAIT DISCONNECT
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int int_disc_wodp ; 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 switch, WHEN NOT MSG_IN
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MOVE 0, ds_ExtMsg, WHEN MSG_IN
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INT int_msgsdp, IF NOT 0x04 ; interrupt if not disconnect
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CLEAR ACK
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WAIT DISCONNECT
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INT int_disc ; signal disconnect
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reselect:
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wait_reselect:
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WAIT RESELECT select_adr
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; NB: these NOPs are CRITICAL to preserve the 1:1
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; correspondence between instructions in this script
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; and instructions in the osiop (53c710) script:
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NOP
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NOP ; reselect ID already in SFBR
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INT int_identify, WHEN NOT MSG_IN
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MOVE 0, ds_Msg, WHEN MSG_IN
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INT int_reconnect ; let host know about reconnect
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CLEAR ACK ; acknowlege the message
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JUMP switch
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select_adr:
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MOVE SCNTL1 & 0x10 to SFBR ; get connected status
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INT int_connect, IF 0x00 ; tell host if not connected
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NOP ; Sig_P doesn't exist on the 53c700
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JUMP wait_reselect ; and try reselect again
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msgout:
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MOVE 0, ds_MsgOut, WHEN MSG_OUT
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JUMP switch
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command_phase:
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CLEAR ATN
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MOVE 0, ds_Cmd, WHEN CMD
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JUMP switch
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dataout:
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MOVE 0, ds_Data1, WHEN DATA_OUT
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CALL switch, WHEN NOT DATA_OUT
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MOVE 0, ds_Data1, WHEN DATA_OUT
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CALL switch, WHEN NOT DATA_OUT
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MOVE 0, ds_Data1, WHEN DATA_OUT
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CALL switch, WHEN NOT DATA_OUT
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MOVE 0, ds_Data1, WHEN DATA_OUT
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CALL switch, WHEN NOT DATA_OUT
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MOVE 0, ds_Data1, WHEN DATA_OUT
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CALL switch, WHEN NOT DATA_OUT
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MOVE 0, ds_Data1, WHEN DATA_OUT
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CALL switch, WHEN NOT DATA_OUT
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MOVE 0, ds_Data1, WHEN DATA_OUT
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CALL switch, WHEN NOT DATA_OUT
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MOVE 0, ds_Data1, WHEN DATA_OUT
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CALL switch, WHEN NOT DATA_OUT
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MOVE 0, ds_Data1, WHEN DATA_OUT
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CALL switch, WHEN NOT DATA_OUT
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MOVE 0, ds_Data1, WHEN DATA_OUT
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CALL switch, WHEN NOT DATA_OUT
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MOVE 0, ds_Data1, WHEN DATA_OUT
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CALL switch, WHEN NOT DATA_OUT
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MOVE 0, ds_Data1, WHEN DATA_OUT
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CALL switch, WHEN NOT DATA_OUT
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MOVE 0, ds_Data1, WHEN DATA_OUT
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CALL switch, WHEN NOT DATA_OUT
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MOVE 0, ds_Data1, WHEN DATA_OUT
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CALL switch, WHEN NOT DATA_OUT
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MOVE 0, ds_Data1, WHEN DATA_OUT
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CALL switch, WHEN NOT DATA_OUT
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MOVE 0, ds_Data1, WHEN DATA_OUT
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CALL switch, WHEN NOT DATA_OUT
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MOVE 0, ds_Data1, WHEN DATA_OUT
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CALL switch
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datain:
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MOVE 0, ds_Data1, WHEN DATA_IN
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CALL switch, WHEN NOT DATA_IN
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MOVE 0, ds_Data1, WHEN DATA_IN
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CALL switch, WHEN NOT DATA_IN
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MOVE 0, ds_Data1, WHEN DATA_IN
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CALL switch, WHEN NOT DATA_IN
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MOVE 0, ds_Data1, WHEN DATA_IN
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CALL switch, WHEN NOT DATA_IN
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MOVE 0, ds_Data1, WHEN DATA_IN
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CALL switch, WHEN NOT DATA_IN
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MOVE 0, ds_Data1, WHEN DATA_IN
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CALL switch, WHEN NOT DATA_IN
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MOVE 0, ds_Data1, WHEN DATA_IN
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CALL switch, WHEN NOT DATA_IN
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MOVE 0, ds_Data1, WHEN DATA_IN
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CALL switch, WHEN NOT DATA_IN
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MOVE 0, ds_Data1, WHEN DATA_IN
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CALL switch, WHEN NOT DATA_IN
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MOVE 0, ds_Data1, WHEN DATA_IN
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CALL switch, WHEN NOT DATA_IN
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MOVE 0, ds_Data1, WHEN DATA_IN
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CALL switch, WHEN NOT DATA_IN
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MOVE 0, ds_Data1, WHEN DATA_IN
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CALL switch, WHEN NOT DATA_IN
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MOVE 0, ds_Data1, WHEN DATA_IN
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CALL switch, WHEN NOT DATA_IN
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MOVE 0, ds_Data1, WHEN DATA_IN
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CALL switch, WHEN NOT DATA_IN
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MOVE 0, ds_Data1, WHEN DATA_IN
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CALL switch, WHEN NOT DATA_IN
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MOVE 0, ds_Data1, WHEN DATA_IN
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CALL switch, WHEN NOT DATA_IN
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MOVE 0, ds_Data1, WHEN DATA_IN
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CALL switch
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end:
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MOVE 0, ds_Status, WHEN STATUS
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int int_status, WHEN NOT MSG_IN ; status not followed by msg
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MOVE 0, ds_Msg, WHEN MSG_IN
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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 wait_reselect
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