1; $NetBSD: siop2_script.ss,v 1.3 1999/03/26 22:50:23 mhitch 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; 3. All advertising materials mentioning features or use of this software 16; must display the following acknowledgement: 17; This product includes software developed by Michael L. Hitch. 18; 4. The name of the author may not be used to endorse or promote products 19; derived from this software without specific prior written permission 20; 21; THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22; IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23; OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24; IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25; INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26; NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27; DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28; THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29; (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30; THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31; 32 33; NCR 53c770 script 34; 35ARCH 720 36; 37ABSOLUTE ds_Device = 0 38ABSOLUTE ds_MsgOut = ds_Device + 4 39ABSOLUTE ds_Cmd = ds_MsgOut + 8 40ABSOLUTE ds_Status = ds_Cmd + 8 41ABSOLUTE ds_Msg = ds_Status + 8 42ABSOLUTE ds_MsgIn = ds_Msg + 8 43ABSOLUTE ds_ExtMsg = ds_MsgIn + 8 44ABSOLUTE ds_NegMsg = ds_ExtMsg + 8 45ABSOLUTE ds_Data1 = ds_NegMsg + 8 46ABSOLUTE ds_Data2 = ds_Data1 + 8 47ABSOLUTE ds_Data3 = ds_Data2 + 8 48ABSOLUTE ds_Data4 = ds_Data3 + 8 49ABSOLUTE ds_Data5 = ds_Data4 + 8 50ABSOLUTE ds_Data6 = ds_Data5 + 8 51ABSOLUTE ds_Data7 = ds_Data6 + 8 52ABSOLUTE ds_Data8 = ds_Data7 + 8 53ABSOLUTE ds_Data9 = ds_Data8 + 8 54 55ABSOLUTE ok = 0xff00 56ABSOLUTE err1 = 0xff01 57ABSOLUTE err2 = 0xff02 58ABSOLUTE err3 = 0xff03 59ABSOLUTE err4 = 0xff04 60ABSOLUTE err5 = 0xff05 61ABSOLUTE err6 = 0xff06 62ABSOLUTE err7 = 0xff07 63ABSOLUTE err8 = 0xff08 64ABSOLUTE err9 = 0xff09 65ABSOLUTE err10 = 0xff0a 66ABSOLUTE err11 = 0xff0b 67 68ENTRY scripts 69ENTRY switch 70ENTRY wait_reselect 71ENTRY dataout 72ENTRY datain 73ENTRY clear_ack 74 75PROC siopng_scripts: 76 77scripts: 78 79 SELECT ATN FROM ds_Device, REL(reselect) 80; 81switch: 82 JUMP REL(msgin), WHEN MSG_IN 83 JUMP REL(msgout), IF MSG_OUT 84 JUMP REL(command_phase), IF CMD 85 JUMP REL(dataout), IF DATA_OUT 86 JUMP REL(datain), IF DATA_IN 87 JUMP REL(end), IF STATUS 88 89 INT err5 ; Unrecognized phase 90 91msgin: 92 MOVE FROM ds_MsgIn, WHEN MSG_IN 93 JUMP REL(ext_msg), IF 0x01 ; extended message 94 JUMP REL(disc), IF 0x04 ; disconnect message 95 JUMP REL(msg_sdp), IF 0x02 ; save data pointers 96 JUMP REL(msg_rej), IF 0x07 ; message reject 97 JUMP REL(msg_rdp), IF 0x03 ; restore data pointers 98 INT err6 ; unrecognized message 99 100msg_rej: 101; Do we need to interrupt host here to let it handle the reject? 102msg_rdp: 103clear_ack: 104 CLEAR ACK 105 CLEAR ATN 106 JUMP REL(switch) 107 108ext_msg: 109 CLEAR ACK 110 MOVE FROM ds_ExtMsg, WHEN MSG_IN 111 JUMP REL(neg_msg), IF 0x03 ; extended message might be SDTR 112 JUMP REL(neg_msg), IF 0x02 ; extended message might be WDTR 113 int err7 ; extended message not SDTR 114 115neg_msg: 116 CLEAR ACK 117 MOVE FROM ds_NegMsg, WHEN MSG_IN 118 int err11 ; Let host handle the message 119; If we continue from the interrupt, the host has set up a response 120; message to be sent. Set ATN, clear ACK, and continue. 121 SET ATN 122 CLEAR ACK 123 JUMP REL(switch) 124 125disc: 126 MOVE SCNTL2 & 0x7f TO SCNTL2 127 CLEAR ACK 128 WAIT DISCONNECT 129 130 int err2 ; signal disconnect w/o save DP 131 132msg_sdp: 133 CLEAR ACK ; acknowledge message 134 JUMP REL(switch), WHEN NOT MSG_IN 135 MOVE FROM ds_ExtMsg, WHEN MSG_IN 136 INT err8, IF NOT 0x04 ; interrupt if not disconnect 137 MOVE SCNTL2 & 0x7f TO SCNTL2 138 CLEAR ACK 139 WAIT DISCONNECT 140 141 INT err1 ; signal disconnect 142 143reselect: 144wait_reselect: 145 WAIT RESELECT REL(select_adr) 146 MOVE SSID & 0x8f to SFBR ; Save reselect ID 147 MOVE SFBR to SCRATCHA0 148 149 INT err9, WHEN NOT MSG_IN ; didn't get IDENTIFY 150 MOVE FROM ds_Msg, WHEN MSG_IN 151 INT err3 ; let host know about reconnect 152 CLEAR ACK ; acknowlege the message 153 JUMP REL(switch) 154 155 156select_adr: 157 MOVE SCNTL1 & 0x10 to SFBR ; get connected status 158 INT err4, IF 0x00 ; tell host if not connected 159 MOVE CTEST2 & 0x40 to SFBR ; clear Sig_P 160 JUMP REL(wait_reselect) ; and try reselect again 161 162msgout: 163 MOVE FROM ds_MsgOut, WHEN MSG_OUT 164 JUMP REL(switch) 165 166command_phase: 167 CLEAR ATN 168 MOVE FROM ds_Cmd, WHEN CMD 169 JUMP REL(switch) 170 171dataout: 172 MOVE FROM ds_Data1, WHEN DATA_OUT 173 CALL REL(switch), WHEN NOT DATA_OUT 174 MOVE FROM ds_Data2, WHEN DATA_OUT 175 CALL REL(switch), WHEN NOT DATA_OUT 176 MOVE FROM ds_Data3, WHEN DATA_OUT 177 CALL REL(switch), WHEN NOT DATA_OUT 178 MOVE FROM ds_Data4, WHEN DATA_OUT 179 CALL REL(switch), WHEN NOT DATA_OUT 180 MOVE FROM ds_Data5, WHEN DATA_OUT 181 CALL REL(switch), WHEN NOT DATA_OUT 182 MOVE FROM ds_Data6, WHEN DATA_OUT 183 CALL REL(switch), WHEN NOT DATA_OUT 184 MOVE FROM ds_Data7, WHEN DATA_OUT 185 CALL REL(switch), WHEN NOT DATA_OUT 186 MOVE FROM ds_Data8, WHEN DATA_OUT 187 CALL REL(switch), WHEN NOT DATA_OUT 188 MOVE FROM ds_Data9, WHEN DATA_OUT 189 CALL REL(switch) 190 191datain: 192 MOVE FROM ds_Data1, WHEN DATA_IN 193 CALL REL(switch), WHEN NOT DATA_IN 194 MOVE FROM ds_Data2, WHEN DATA_IN 195 CALL REL(switch), WHEN NOT DATA_IN 196 MOVE FROM ds_Data3, WHEN DATA_IN 197 CALL REL(switch), WHEN NOT DATA_IN 198 MOVE FROM ds_Data4, WHEN DATA_IN 199 CALL REL(switch), WHEN NOT DATA_IN 200 MOVE FROM ds_Data5, WHEN DATA_IN 201 CALL REL(switch), WHEN NOT DATA_IN 202 MOVE FROM ds_Data6, WHEN DATA_IN 203 CALL REL(switch), WHEN NOT DATA_IN 204 MOVE FROM ds_Data7, WHEN DATA_IN 205 CALL REL(switch), WHEN NOT DATA_IN 206 MOVE FROM ds_Data8, WHEN DATA_IN 207 CALL REL(switch), WHEN NOT DATA_IN 208 MOVE FROM ds_Data9, WHEN DATA_IN 209 CALL REL(switch) 210 211end: 212 MOVE FROM ds_Status, WHEN STATUS 213 int err10, WHEN NOT MSG_IN ; status not followed by msg 214 MOVE FROM ds_Msg, WHEN MSG_IN 215 MOVE SCNTL2 & 0x7f TO SCNTL2 216 CLEAR ACK 217 WAIT DISCONNECT 218 INT ok ; signal completion 219 JUMP REL(wait_reselect) 220