; $OpenBSD: osiop.ss,v 1.3 2023/01/04 10:05:44 jsg Exp $ ; $NetBSD: osiop.ss,v 1.1 2001/04/30 04:47:51 tsutsui 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. ; ; 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 ; ARCH 710 ; ABSOLUTE ds_Device = 0 ABSOLUTE ds_MsgOut = ds_Device + 8 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 ds_Data10 = ds_Data9 + 8 ABSOLUTE ds_Data11 = ds_Data10 + 8 ABSOLUTE ds_Data12 = ds_Data11 + 8 ABSOLUTE ds_Data13 = ds_Data12 + 8 ABSOLUTE ds_Data14 = ds_Data13 + 8 ABSOLUTE ds_Data15 = ds_Data14 + 8 ABSOLUTE ds_Data16 = ds_Data15 + 8 ABSOLUTE ds_Data17 = ds_Data16 + 8 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 osiop_script: 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 int_phase ; 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 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 REL(switch) ext_msg: CLEAR ACK MOVE FROM ds_ExtMsg, WHEN MSG_IN JUMP REL(sync_msg), IF 0x03 int int_extmsg ; extended message not SDTR sync_msg: CLEAR ACK MOVE FROM 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 REL(switch) disc: CLEAR ACK WAIT DISCONNECT int int_disc_wodp ; 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 int_msgsdp, IF NOT 0x04 ; interrupt if not disconnect CLEAR ACK WAIT DISCONNECT INT int_disc ; signal disconnect reselect: wait_reselect: WAIT RESELECT REL(select_adr) MOVE LCRC to SFBR ; Save reselect ID MOVE SFBR to SCRATCH0 INT int_identify, WHEN NOT MSG_IN MOVE FROM ds_Msg, WHEN MSG_IN INT int_reconnect ; let host know about reconnect CLEAR ACK ; acknowledge the message JUMP REL(switch) select_adr: MOVE SCNTL1 & 0x10 to SFBR ; get connected status INT int_connect, 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), WHEN NOT DATA_OUT MOVE FROM ds_Data10, WHEN DATA_OUT CALL REL(switch), WHEN NOT DATA_OUT MOVE FROM ds_Data11, WHEN DATA_OUT CALL REL(switch), WHEN NOT DATA_OUT MOVE FROM ds_Data12, WHEN DATA_OUT CALL REL(switch), WHEN NOT DATA_OUT MOVE FROM ds_Data13, WHEN DATA_OUT CALL REL(switch), WHEN NOT DATA_OUT MOVE FROM ds_Data14, WHEN DATA_OUT CALL REL(switch), WHEN NOT DATA_OUT MOVE FROM ds_Data15, WHEN DATA_OUT CALL REL(switch), WHEN NOT DATA_OUT MOVE FROM ds_Data16, WHEN DATA_OUT CALL REL(switch), WHEN NOT DATA_OUT MOVE FROM ds_Data17, 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), WHEN NOT DATA_IN MOVE FROM ds_Data10, WHEN DATA_IN CALL REL(switch), WHEN NOT DATA_IN MOVE FROM ds_Data11, WHEN DATA_IN CALL REL(switch), WHEN NOT DATA_IN MOVE FROM ds_Data12, WHEN DATA_IN CALL REL(switch), WHEN NOT DATA_IN MOVE FROM ds_Data13, WHEN DATA_IN CALL REL(switch), WHEN NOT DATA_IN MOVE FROM ds_Data14, WHEN DATA_IN CALL REL(switch), WHEN NOT DATA_IN MOVE FROM ds_Data15, WHEN DATA_IN CALL REL(switch), WHEN NOT DATA_IN MOVE FROM ds_Data16, WHEN DATA_IN CALL REL(switch), WHEN NOT DATA_IN MOVE FROM ds_Data17, WHEN DATA_IN CALL REL(switch) end: MOVE FROM ds_Status, WHEN STATUS int int_status, 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)