1; $NetBSD: siop_script.ss,v 1.6 2016/12/12 15:58:44 maya Exp $ 2 3; 4; Copyright (c) 1995 Michael L. Hitch 5; All rights reserved. 6; 7; Redistribution and use in source and binary forms, with or without 8; modification, are permitted provided that the following conditions 9; are met: 10; 1. Redistributions of source code must retain the above copyright 11; notice, this list of conditions and the following disclaimer. 12; 2. Redistributions in binary form must reproduce the above copyright 13; notice, this list of conditions and the following disclaimer in the 14; documentation and/or other materials provided with the distribution. 15; 16; THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17; IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18; OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19; IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20; INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21; NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22; DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23; THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24; (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25; THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26; 27 28; NCR 53c710 script 29; 30ARCH 710 31; 32ABSOLUTE ds_Device = 0 33ABSOLUTE ds_MsgOut = ds_Device + 4 34ABSOLUTE ds_Cmd = ds_MsgOut + 8 35ABSOLUTE ds_Status = ds_Cmd + 8 36ABSOLUTE ds_Msg = ds_Status + 8 37ABSOLUTE ds_MsgIn = ds_Msg + 8 38ABSOLUTE ds_ExtMsg = ds_MsgIn + 8 39ABSOLUTE ds_SyncMsg = ds_ExtMsg + 8 40ABSOLUTE ds_Data1 = ds_SyncMsg + 8 41ABSOLUTE ds_Data2 = ds_Data1 + 8 42ABSOLUTE ds_Data3 = ds_Data2 + 8 43ABSOLUTE ds_Data4 = ds_Data3 + 8 44ABSOLUTE ds_Data5 = ds_Data4 + 8 45ABSOLUTE ds_Data6 = ds_Data5 + 8 46ABSOLUTE ds_Data7 = ds_Data6 + 8 47ABSOLUTE ds_Data8 = ds_Data7 + 8 48ABSOLUTE ds_Data9 = ds_Data8 + 8 49 50ABSOLUTE ok = 0xff00 51ABSOLUTE err1 = 0xff01 52ABSOLUTE err2 = 0xff02 53ABSOLUTE err3 = 0xff03 54ABSOLUTE err4 = 0xff04 55ABSOLUTE err5 = 0xff05 56ABSOLUTE err6 = 0xff06 57ABSOLUTE err7 = 0xff07 58ABSOLUTE err8 = 0xff08 59ABSOLUTE err9 = 0xff09 60ABSOLUTE err10 = 0xff0a 61ABSOLUTE err11 = 0xff0b 62 63ENTRY scripts 64ENTRY switch 65ENTRY wait_reselect 66ENTRY dataout 67ENTRY datain 68ENTRY clear_ack 69 70PROC scripts: 71 72scripts: 73 74 SELECT ATN FROM ds_Device, REL(reselect) 75; 76switch: 77 JUMP REL(msgin), WHEN MSG_IN 78 JUMP REL(msgout), IF MSG_OUT 79 JUMP REL(command_phase), IF CMD 80 JUMP REL(dataout), IF DATA_OUT 81 JUMP REL(datain), IF DATA_IN 82 JUMP REL(end), IF STATUS 83 84 INT err5 ; Unrecognized phase 85 86msgin: 87 MOVE FROM ds_MsgIn, WHEN MSG_IN 88 JUMP REL(ext_msg), IF 0x01 ; extended message 89 JUMP REL(disc), IF 0x04 ; disconnect message 90 JUMP REL(msg_sdp), IF 0x02 ; save data pointers 91 JUMP REL(msg_rej), IF 0x07 ; message reject 92 JUMP REL(msg_rdp), IF 0x03 ; restore data pointers 93 INT err6 ; unrecognized message 94 95msg_rej: 96; Do we need to interrupt host here to let it handle the reject? 97msg_rdp: 98clear_ack: 99 CLEAR ACK 100 CLEAR ATN 101 JUMP REL(switch) 102 103ext_msg: 104 CLEAR ACK 105 MOVE FROM ds_ExtMsg, WHEN MSG_IN 106 JUMP REL(sync_msg), IF 0x03 107 int err7 ; extended message not SDTR 108 109sync_msg: 110 CLEAR ACK 111 MOVE FROM ds_SyncMsg, WHEN MSG_IN 112 int err11 ; Let host handle the message 113; If we continue from the interrupt, the host has set up a response 114; message to be sent. Set ATN, clear ACK, and continue. 115 SET ATN 116 CLEAR ACK 117 JUMP REL(switch) 118 119disc: 120 CLEAR ACK 121 WAIT DISCONNECT 122 123 int err2 ; signal disconnect w/o save DP 124 125msg_sdp: 126 CLEAR ACK ; acknowledge message 127 JUMP REL(switch), WHEN NOT MSG_IN 128 MOVE FROM ds_ExtMsg, WHEN MSG_IN 129 INT err8, IF NOT 0x04 ; interrupt if not disconnect 130 CLEAR ACK 131 WAIT DISCONNECT 132 133 INT err1 ; signal disconnect 134 135reselect: 136wait_reselect: 137 WAIT RESELECT REL(select_adr) 138 MOVE LCRC to SFBR ; Save reselect ID 139 MOVE SFBR to SCRATCH0 140 141 INT err9, WHEN NOT MSG_IN ; didn't get IDENTIFY 142 MOVE FROM ds_Msg, WHEN MSG_IN 143 INT err3 ; let host know about reconnect 144 CLEAR ACK ; acknowledge the message 145 JUMP REL(switch) 146 147 148select_adr: 149 MOVE SCNTL1 & 0x10 to SFBR ; get connected status 150 INT err4, IF 0x00 ; tell host if not connected 151 MOVE CTEST2 & 0x40 to SFBR ; clear Sig_P 152 JUMP REL(wait_reselect) ; and try reselect again 153 154msgout: 155 MOVE FROM ds_MsgOut, WHEN MSG_OUT 156 JUMP REL(switch) 157 158command_phase: 159 CLEAR ATN 160 MOVE FROM ds_Cmd, WHEN CMD 161 JUMP REL(switch) 162 163dataout: 164 MOVE FROM ds_Data1, WHEN DATA_OUT 165 CALL REL(switch), WHEN NOT DATA_OUT 166 MOVE FROM ds_Data2, WHEN DATA_OUT 167 CALL REL(switch), WHEN NOT DATA_OUT 168 MOVE FROM ds_Data3, WHEN DATA_OUT 169 CALL REL(switch), WHEN NOT DATA_OUT 170 MOVE FROM ds_Data4, WHEN DATA_OUT 171 CALL REL(switch), WHEN NOT DATA_OUT 172 MOVE FROM ds_Data5, WHEN DATA_OUT 173 CALL REL(switch), WHEN NOT DATA_OUT 174 MOVE FROM ds_Data6, WHEN DATA_OUT 175 CALL REL(switch), WHEN NOT DATA_OUT 176 MOVE FROM ds_Data7, WHEN DATA_OUT 177 CALL REL(switch), WHEN NOT DATA_OUT 178 MOVE FROM ds_Data8, WHEN DATA_OUT 179 CALL REL(switch), WHEN NOT DATA_OUT 180 MOVE FROM ds_Data9, WHEN DATA_OUT 181 CALL REL(switch) 182 183datain: 184 MOVE FROM ds_Data1, WHEN DATA_IN 185 CALL REL(switch), WHEN NOT DATA_IN 186 MOVE FROM ds_Data2, WHEN DATA_IN 187 CALL REL(switch), WHEN NOT DATA_IN 188 MOVE FROM ds_Data3, WHEN DATA_IN 189 CALL REL(switch), WHEN NOT DATA_IN 190 MOVE FROM ds_Data4, WHEN DATA_IN 191 CALL REL(switch), WHEN NOT DATA_IN 192 MOVE FROM ds_Data5, WHEN DATA_IN 193 CALL REL(switch), WHEN NOT DATA_IN 194 MOVE FROM ds_Data6, WHEN DATA_IN 195 CALL REL(switch), WHEN NOT DATA_IN 196 MOVE FROM ds_Data7, WHEN DATA_IN 197 CALL REL(switch), WHEN NOT DATA_IN 198 MOVE FROM ds_Data8, WHEN DATA_IN 199 CALL REL(switch), WHEN NOT DATA_IN 200 MOVE FROM ds_Data9, WHEN DATA_IN 201 CALL REL(switch) 202 203end: 204 MOVE FROM ds_Status, WHEN STATUS 205 int err10, WHEN NOT MSG_IN ; status not followed by msg 206 MOVE FROM ds_Msg, WHEN MSG_IN 207 CLEAR ACK 208 WAIT DISCONNECT 209 INT ok ; signal completion 210 JUMP REL(wait_reselect) 211