1; $NetBSD: siop2_script.ss,v 1.8 2016/12/12 15:58:44 maya Exp $ 2 3; 4; Copyright (c) 1998 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 53c770 script 29; 30ARCH 720 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_NegMsg = ds_ExtMsg + 8 40ABSOLUTE ds_Data1 = ds_NegMsg + 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 siopng_scripts: 71 72scripts: 73 74 SELECT ATN FROM ds_Device, REL(reselect) 75; 76switch: 77 MOVE GPREG | 0x10 TO GPREG 78 JUMP REL(msgin), WHEN MSG_IN 79 JUMP REL(msgout), IF MSG_OUT 80 JUMP REL(command_phase), IF CMD 81 JUMP REL(dataout), IF DATA_OUT 82 JUMP REL(datain), IF DATA_IN 83 JUMP REL(end), IF STATUS 84 85 INT err5 ; Unrecognized phase 86 87msgin: 88 MOVE FROM ds_MsgIn, WHEN MSG_IN 89 JUMP REL(ext_msg), IF 0x01 ; extended message 90 JUMP REL(disc), IF 0x04 ; disconnect message 91 JUMP REL(msg_sdp), IF 0x02 ; save data pointers 92 JUMP REL(msg_rej), IF 0x07 ; message reject 93 JUMP REL(msg_rdp), IF 0x03 ; restore data pointers 94 INT err6 ; unrecognized message 95 96msg_rej: 97; Do we need to interrupt host here to let it handle the reject? 98msg_rdp: 99clear_ack: 100 CLEAR ACK 101 CLEAR ATN 102 JUMP REL(switch) 103 104ext_msg: 105 CLEAR ACK 106 MOVE FROM ds_ExtMsg, WHEN MSG_IN 107 JUMP REL(neg_msg), IF 0x03 ; extended message might be SDTR 108 JUMP REL(neg_msg), IF 0x02 ; extended message might be WDTR 109 INT err7 ; extended message not SDTR 110 111neg_msg: 112 CLEAR ACK 113 MOVE FROM ds_NegMsg, WHEN MSG_IN 114 INT err11 ; Let host handle the message 115; If we continue from the interrupt, the host has set up a response 116; message to be sent. Set ATN, clear ACK, and continue. 117 SET ATN 118 CLEAR ACK 119 JUMP REL(switch) 120 121disc: 122 MOVE SCNTL2 & 0x7f TO SCNTL2 123 MOVE GPREG & 0xEF TO GPREG 124 CLEAR ACK 125 WAIT DISCONNECT 126 127 INT err2 ; signal disconnect w/o save DP 128 129msg_sdp: 130 CLEAR ACK ; acknowledge message 131 JUMP REL(switch), WHEN NOT MSG_IN 132 MOVE FROM ds_ExtMsg, WHEN MSG_IN 133 INT err8, IF NOT 0x04 ; interrupt if not disconnect 134 MOVE SCNTL2 & 0x7f TO SCNTL2 135 CLEAR ACK 136 WAIT DISCONNECT 137 138 INT err1 ; signal disconnect 139 140reselect: 141wait_reselect: 142 WAIT RESELECT REL(select_adr) 143 MOVE SSID & 0x8f to SFBR ; Save reselect ID 144 MOVE SFBR to SCRATCHA0 145 146 INT err9, WHEN NOT MSG_IN ; didn't get IDENTIFY 147 MOVE FROM ds_Msg, WHEN MSG_IN 148 INT err3 ; let host know about reconnect 149 CLEAR ACK ; acknowledge the message 150 JUMP REL(switch) 151 152 153select_adr: 154 MOVE SCNTL1 & 0x10 to SFBR ; get connected status 155 INT err4, IF 0x00 ; tell host if not connected 156 MOVE CTEST2 & 0x40 to SFBR ; clear Sig_P 157 JUMP REL(wait_reselect) ; and try reselect again 158 159msgout: 160 MOVE FROM ds_MsgOut, WHEN MSG_OUT 161 JUMP REL(switch) 162 163command_phase: 164 CLEAR ATN 165 MOVE FROM ds_Cmd, WHEN CMD 166 JUMP REL(switch) 167 168dataout: 169 MOVE FROM ds_Data1, WHEN DATA_OUT 170 CALL REL(switch), WHEN NOT DATA_OUT 171 MOVE FROM ds_Data2, WHEN DATA_OUT 172 CALL REL(switch), WHEN NOT DATA_OUT 173 MOVE FROM ds_Data3, WHEN DATA_OUT 174 CALL REL(switch), WHEN NOT DATA_OUT 175 MOVE FROM ds_Data4, WHEN DATA_OUT 176 CALL REL(switch), WHEN NOT DATA_OUT 177 MOVE FROM ds_Data5, WHEN DATA_OUT 178 CALL REL(switch), WHEN NOT DATA_OUT 179 MOVE FROM ds_Data6, WHEN DATA_OUT 180 CALL REL(switch), WHEN NOT DATA_OUT 181 MOVE FROM ds_Data7, WHEN DATA_OUT 182 CALL REL(switch), WHEN NOT DATA_OUT 183 MOVE FROM ds_Data8, WHEN DATA_OUT 184 CALL REL(switch), WHEN NOT DATA_OUT 185 MOVE FROM ds_Data9, WHEN DATA_OUT 186 CALL REL(switch) 187 188datain: 189 MOVE FROM ds_Data1, WHEN DATA_IN 190 CALL REL(switch), WHEN NOT DATA_IN 191 MOVE FROM ds_Data2, WHEN DATA_IN 192 CALL REL(switch), WHEN NOT DATA_IN 193 MOVE FROM ds_Data3, WHEN DATA_IN 194 CALL REL(switch), WHEN NOT DATA_IN 195 MOVE FROM ds_Data4, WHEN DATA_IN 196 CALL REL(switch), WHEN NOT DATA_IN 197 MOVE FROM ds_Data5, WHEN DATA_IN 198 CALL REL(switch), WHEN NOT DATA_IN 199 MOVE FROM ds_Data6, WHEN DATA_IN 200 CALL REL(switch), WHEN NOT DATA_IN 201 MOVE FROM ds_Data7, WHEN DATA_IN 202 CALL REL(switch), WHEN NOT DATA_IN 203 MOVE FROM ds_Data8, WHEN DATA_IN 204 CALL REL(switch), WHEN NOT DATA_IN 205 MOVE FROM ds_Data9, WHEN DATA_IN 206 CALL REL(switch) 207 208end: 209 MOVE FROM ds_Status, WHEN STATUS 210 INT err10, WHEN NOT MSG_IN ; status not followed by msg 211 MOVE FROM ds_Msg, WHEN MSG_IN 212 MOVE SCNTL2 & 0x7f TO SCNTL2 213 CLEAR ACK 214 WAIT DISCONNECT 215 MOVE GPREG & 0xEF TO GPREG 216 INT ok ; signal completion 217 JUMP REL(wait_reselect) 218