/* Handle processing terminal controller commands */
t_stat dtc_srv(UNIT * uptr)
{
int chan = uptr->CMD & DTC_CHAN;
uint8 ch;
int ttu;
int buf;
int i;
int line = uptr->LINE;
/* Process interrage command */
if (uptr->CMD & DTC_INQ) {
if (line == -1) {
buf = -1;
for(i = 0; i < DTC_MLINES; i++) {
if (dtc_lstatus[i]& BufIRQ) {
if ((dtc_lstatus[i] & BufSMASK) == BufReadRdy)
buf = i;
if ((dtc_lstatus[i] & BufSMASK) == BufWriteRdy ||
(dtc_lstatus[i] & BufSMASK) == BufIdle) {
line = i;
break;
}
}
}
sim_debug(DEBUG_DETAIL, &dtc_dev, "Datacomm inqury found %d %d ",
line, buf);
if (line != -1) {
if ((dtc_lstatus[line] & BufSMASK) == BufWriteRdy) {
chan_set_eof(chan);
sim_debug(DEBUG_DETAIL, &dtc_dev, " writerdy ");
} else {
sim_debug(DEBUG_DETAIL, &dtc_dev, " idle ");
}
} else if (buf != -1) {
chan_set_read(chan);
sim_debug(DEBUG_DETAIL, &dtc_dev, " readrdy ");
line = buf;
}
if (line != -1) {
if (dtc_lstatus[line] & BufAbnormal) {
chan_set_wcflg(chan);
sim_debug(DEBUG_DETAIL, &dtc_dev, " abnormal ");
}
dtc_lstatus[line] &= ~BufIRQ;
}
} else {
if (line > dtc_desc.lines) {
chan_set_notrdy(chan);
} else {
switch(dtc_lstatus[line] & BufSMASK) {
case BufReadRdy:
chan_set_read(chan);
sim_debug(DEBUG_DETAIL, &dtc_dev, " readrdy ");
break;
case BufWriteRdy:
chan_set_eof(chan);
sim_debug(DEBUG_DETAIL, &dtc_dev, " writerdy ");
break;
case BufIdle:
sim_debug(DEBUG_DETAIL, &dtc_dev, " idle ");
break;
default:
chan_set_error(chan);
sim_debug(DEBUG_DETAIL, &dtc_dev, " busy ");
break;
}
}
if (dtc_lstatus[line] & BufAbnormal) {
chan_set_wcflg(chan);
sim_debug(DEBUG_DETAIL, &dtc_dev, " abnormal ");
}
dtc_lstatus[line] &= ~BufIRQ;
chan_set_wc(uptr->LINE, 0);
chan_set_end(chan);
sim_debug(DEBUG_DETAIL, &dtc_dev, " %03o ", dtc_lstatus[line]);
}
if (line != -1) {
for (ttu = 1; line > 15; ttu++)
line -= 15;
} else {
ttu = line = 0;
}
chan_set_wc(chan, (ttu << 5) | line);
chan_set_end(chan);
uptr->CMD = DTC_RDY;
sim_debug(DEBUG_DETAIL, &dtc_dev, "Datacomm inqury %d %d\n",
ttu, line);
}
/* Process for each unit */
if (uptr->CMD & DTC_WR) {
if (line > dtc_desc.lines || line == -1 || dtc_lstatus[line] & BufDisco) {
sim_debug(DEBUG_DETAIL, &dtc_dev, "Datacomm write invalid %d\n",
line);
chan_set_notrdy(chan);
chan_set_end(chan);
uptr->CMD = DTC_RDY;
return SCPE_OK;
}
/* Validate that we can send data to buffer */
i = dtc_lstatus[line] & BufSMASK;
switch(i) {
case BufNotReady:
chan_set_notrdy(chan);
/* Fall through */
case BufInputBusy:
/* Fall through */
case BufRead:
/* Fall through */
case BufReadRdy:
chan_set_error(chan);
/* Fall through */
case BufOutBusy:
chan_set_eof(chan);
chan_set_end(chan);
uptr->CMD = DTC_RDY;
sim_debug(DEBUG_DETAIL, &dtc_dev, "Datacomm write busy %d %d\n",
line, i);
return SCPE_OK;
/* Ok to start filling */
case BufIdle:
case BufWriteRdy:
dtc_bufptr[line] = 0;
dtc_bsize[line] = 0;
sim_debug(DEBUG_DETAIL, &dtc_dev, "Datacomm write start %d\n",
line);
break;
/* Continue filling */
case BufWrite:
break;
}
if (chan_read_char(chan, &ch, dtc_bufptr[line] >= dtc_blimit[line])) {
sim_debug(DEBUG_DETAIL, &dtc_dev, "Datacomm write done %d %d ",
line, dtc_bufptr[line]);
dtc_bsize[line] = dtc_bufptr[line];
dtc_bufptr[line] = 0;
if (dtc_lstatus[line] & BufAbnormal) {
chan_set_wcflg(chan);
}
/* Empty write, clears flags */
if (dtc_bsize[line] == 0) {
sim_debug(DEBUG_DETAIL, &dtc_dev, "empty\n");
if ((dtc_lstatus[line] & BufSMASK) != BufIdle) {
dtc_lstatus[line] = BufIRQ|BufIdle;
IAR |= IRQ_12;
}
/* Check if we filled up buffer */
} else if (dtc_bsize[line] >= dtc_blimit[line]) {
dtc_lstatus[line] = BufOutBusy;
chan_set_gm(chan);
sim_debug(DEBUG_DETAIL, &dtc_dev, "full ");
} else {
dtc_lstatus[line] = BufOutBusy|BufGM;
sim_debug(DEBUG_DETAIL, &dtc_dev, "gm ");
}
sim_debug(DEBUG_DETAIL, &dtc_dev, "\n");
for (ttu = 1; line > 15; ttu++)
line -= 15;
chan_set_wc(chan, (ttu << 5) | line);
chan_set_end(chan);
uptr->CMD = DTC_RDY;
return SCPE_OK;
} else {
dtc_lstatus[line] = BufWrite;
dtc_buf[line][dtc_bufptr[line]++] = ch & 077;
sim_debug(DEBUG_DATA, &dtc_dev, "Datacomm write data %d %02o %d\n",
line, ch&077, dtc_bufptr[line]);
}
sim_activate(uptr, 5000);
}
if (uptr->CMD & DTC_RD) {
if (line > dtc_desc.lines || line == -1 || dtc_lstatus[line] & BufDisco) {
sim_debug(DEBUG_DETAIL, &dtc_dev, "Datacomm read nothing %d\n",
line);
chan_set_notrdy(chan);
chan_set_end(chan);
uptr->CMD = DTC_RDY;
return SCPE_OK;
}
/* Validate that we can send data to buffer */
i = dtc_lstatus[line] & BufSMASK;
switch(i) {
case BufNotReady:
chan_set_notrdy(chan);
/* Fall through */
case BufInputBusy:
chan_set_error(chan);
/* Fall through */
case BufWriteRdy:
/* Fall through */
case BufOutBusy:
/* Fall through */
case BufIdle:
/* Fall through */
case BufWrite:
chan_set_eof(chan);
chan_set_end(chan);
uptr->CMD = DTC_RDY;
sim_debug(DEBUG_DETAIL, &dtc_dev, "Datacomm read busy %d %d\n",
line, i);
return SCPE_OK;
/* Ok to start filling */
case BufReadRdy:
dtc_lstatus[line] = (dtc_lstatus[line] & 030) | BufRead;
dtc_bufptr[line] = 0;
sim_debug(DEBUG_DETAIL, &dtc_dev, "Datacomm read starting %d\n",
line);
break;
/* Continue filling */
case BufRead:
break;
}
ch = dtc_buf[line][dtc_bufptr[line]++];
/* If no buffer, error out */
if (chan_write_char(chan, &ch, dtc_bufptr[line] >= dtc_bsize[line])) {
/* Check if we filled up buffer */
if (dtc_lstatus[line] & BufGM) {
chan_set_gm(chan);
sim_debug(DEBUG_DETAIL, &dtc_dev, "gm ");
}
if (dtc_lstatus[line] & BufAbnormal)
chan_set_wcflg(chan);
if (dtc_ldsc[line].conn == 0) /* connected? */
dtc_lstatus[line] = BufIRQ|BufAbnormal|BufIRQ|BufIdle;
else
dtc_lstatus[line] = BufIRQ|BufIdle;
dtc_bsize[line] = 0;
sim_debug(DEBUG_DETAIL, &dtc_dev, "Datacomm read done %d\n",
line);
for (ttu = 1; line > 15; ttu++)
line -= 15;
chan_set_wc(chan, (ttu << 5) | line);
chan_set_end(chan);
uptr->CMD = DTC_RDY;
IAR |= IRQ_12;
return SCPE_OK;
} else {
sim_debug(DEBUG_DATA, &dtc_dev, "Datacomm read data %d %02o %d\n",
line, ch & 077, dtc_bufptr[line]);
}
sim_activate(uptr, 5000);
}
return SCPE_OK;
}
/* Handle processing of tape requests. */
t_stat mt_srv(UNIT * uptr)
{
int chan = uptr->u5 & MT_CHAN;
int unit = uptr - mt_unit;
int cmd = uptr->u5 & MT_CMD;
DEVICE *dptr = find_dev_from_unit(uptr);
t_mtrlnt reclen;
t_stat r = SCPE_ARG; /* Force error if not set */
uint8 ch;
int mode;
t_mtrlnt loc;
/* Simulate tape load delay */
if (uptr->u5 & MT_LOADED) {
uptr->u5 &= ~MT_LOADED;
uptr->u5 |= MT_BSY|MT_RDY;
sim_debug(DEBUG_DETAIL, dptr, "Unit=%d Loaded\n", unit);
sim_activate(uptr, 50000);
return SCPE_OK;
}
if (uptr->u5 & MT_BSY) {
uptr->u5 &= ~MT_BSY;
sim_debug(DEBUG_DETAIL, dptr, "Unit=%d Online\n", unit);
iostatus |= 1 << (uptr - mt_unit);
if (uptr->u5 & MT_IDLE)
sim_activate(uptr, 50000);
return SCPE_OK;
}
if (uptr->u5 & MT_IDLE) {
uptr->u5 &= ~MT_IDLE;
if (uptr->u5 & MT_RDY) {
sim_debug(DEBUG_DETAIL, dptr, "Unit=%d idling\n", unit);
return SCPE_OK;
}
sim_debug(DEBUG_DETAIL, dptr, "Unit=%d start %02o\n", unit, cmd);
}
switch (cmd) {
/* Handle interrogate */
case MT_INT:
if (sim_tape_wrp(uptr))
chan_set_wrp(chan);
uptr->u5 &= ~(MT_CMD|MT_BIN);
uptr->u5 |= MT_RDY;
chan_set_end(chan);
sim_debug(DEBUG_DETAIL, dptr, "Status\n");
return SCPE_OK;
case MT_RD: /* Read */
/* If at end of record, fill buffer */
if (BUF_EMPTY(uptr)) {
sim_debug(DEBUG_DETAIL, dptr, "Read unit=%d %s ", unit,
(uptr->u5 & MT_BIN)? "bin": "bcd");
if (sim_tape_eot(uptr)) {
sim_activate(uptr, 4000);
return mt_error(uptr, chan, MTSE_EOM, dptr);
}
r = sim_tape_rdrecf(uptr, &mt_buffer[chan][0], &reclen, BUFFSIZE);
if (r != MTSE_OK) {
if (r == MTSE_TMK) {
sim_debug(DEBUG_DETAIL, dptr, "TM\n");
ch = 017;
(void)chan_write_char(chan, &ch, 1);
sim_activate(uptr, 4000);
} else {
sim_debug(DEBUG_DETAIL, dptr, "r=%d\n", r);
sim_activate(uptr, 5000);
}
return mt_error(uptr, chan, r, dptr);
} else {
uptr->u5 &= ~(MT_BOT|MT_EOT);
uptr->hwmark = reclen;
}
sim_debug(DEBUG_DETAIL, dptr, "%d chars\n", uptr->hwmark);
uptr->u6 = 0;
if ((uptr->u5 & MT_BIN) == 0)
mode = 0100;
else
mode = 0;
for (loc = 0; loc < reclen; loc++) {
ch = mt_buffer[chan][loc] & 0177;
if (((parity_table[ch & 077]) ^ (ch & 0100) ^ mode) == 0) {
chan_set_error(chan);
break;
}
}
}
ch = mt_buffer[chan][uptr->u6++] & 0177;
/* 00 characters are not transfered in BCD mode */
if (ch == 0) {
if (((uint32)uptr->u6) >= uptr->hwmark) {
sim_activate(uptr, 4000);
return mt_error(uptr, chan, MTSE_OK, dptr);
} else {
sim_activate(uptr, HT);
return SCPE_OK;
}
}
if (chan_write_char(chan, &ch,
(((uint32)uptr->u6) >= uptr->hwmark) ? 1 : 0)) {
sim_debug(DEBUG_DATA, dptr, "Read unit=%d %d EOR\n", unit,
uptr->hwmark-uptr->u6);
sim_activate(uptr, 4000);
return mt_error(uptr, chan, MTSE_OK, dptr);
} else {
sim_debug(DEBUG_DATA, dptr, "Read data unit=%d %d %03o\n",
unit, uptr->u6, ch);
sim_activate(uptr, HT);
}
return SCPE_OK;
case MT_RDBK: /* Read Backword */
/* If at end of record, fill buffer */
if (BUF_EMPTY(uptr)) {
sim_debug(DEBUG_DETAIL, dptr, "Read back unit=%d %s ", unit,
(uptr->u5 & MT_BIN)? "bin": "bcd");
if (sim_tape_bot(uptr)) {
sim_activate(uptr, 4000);
return mt_error(uptr, chan, MTSE_BOT, dptr);
}
r = sim_tape_rdrecr(uptr, &mt_buffer[chan][0], &reclen, BUFFSIZE);
if (r != MTSE_OK) {
if (r == MTSE_TMK) {
sim_debug(DEBUG_DETAIL, dptr, "TM\n");
ch = 017;
(void)chan_write_char(chan, &ch, 1);
sim_activate(uptr, 4000);
} else {
uptr->u5 |= MT_BSY;
sim_debug(DEBUG_DETAIL, dptr, "r=%d\n", r);
sim_activate(uptr, 100);
}
return mt_error(uptr, chan, r, dptr);
} else {
uptr->u5 &= ~(MT_BOT|MT_EOT);
uptr->hwmark = reclen;
}
sim_debug(DEBUG_DETAIL, dptr, "%d chars\n", uptr->hwmark);
uptr->u6 = uptr->hwmark;
if ((uptr->u5 & MT_BIN) == 0)
mode = 0100;
else
mode = 0;
for (loc = 0; loc < reclen; loc++) {
ch = mt_buffer[chan][loc] & 0177;
if (((parity_table[ch & 077]) ^ (ch & 0100) ^ mode) == 0) {
chan_set_error(chan);
break;
}
}
}
ch = mt_buffer[chan][--uptr->u6] & 0177;
/* 00 characters are not transfered in BCD mode */
if (ch == 0) {
if (uptr->u6 <= 0) {
sim_activate(uptr, 4000);
return mt_error(uptr, chan, MTSE_OK, dptr);
} else {
sim_activate(uptr, HT);
return SCPE_OK;
}
}
if (chan_write_char(chan, &ch, (uptr->u6 > 0) ? 0 : 1)) {
sim_debug(DEBUG_DATA, dptr, "Read back unit=%d %d EOR\n",
unit, uptr->hwmark-uptr->u6);
sim_activate(uptr, 100);
return mt_error(uptr, chan, MTSE_OK, dptr);
} else {
sim_debug(DEBUG_DATA, dptr, "Read back data unit=%d %d %03o\n",
unit, uptr->u6, ch);
sim_activate(uptr, HT);
}
return SCPE_OK;
case MT_WR: /* Write */
/* Check if write protected */
if (uptr->u6 == 0 && sim_tape_wrp(uptr)) {
sim_activate(uptr, 100);
return mt_error(uptr, chan, MTSE_WRP, dptr);
}
if (chan_read_char(chan, &ch,
(uptr->u6 > BUFFSIZE) ? 1 : 0)) {
reclen = uptr->u6;
/* If no transfer, then either erase */
if (reclen == 0) {
sim_debug(DEBUG_DETAIL, dptr, "Erase\n");
r = MTSE_OK;
} else if ((reclen == 1) && (cmd & MT_BIN) == 0 &&
(mt_buffer[chan][0] == 017)) {
/* Check if write rtape mark */
sim_debug(DEBUG_DETAIL, dptr, "Write Mark unit=%d\n", unit);
r = sim_tape_wrtmk(uptr);
} else {
sim_debug(DEBUG_DETAIL, dptr,
"Write unit=%d Block %d %s chars\n", unit, reclen,
(uptr->u5 & MT_BIN)? "bin": "bcd");
r = sim_tape_wrrecf(uptr, &mt_buffer[chan][0], reclen);
}
uptr->u5 &= ~(MT_BOT|MT_EOT);
sim_activate(uptr, 4000);
return mt_error(uptr, chan, r, dptr); /* Record errors */
} else {
/* Copy data to buffer */
ch &= 077;
ch |= parity_table[ch];
if ((uptr->u5 & MT_BIN))
ch ^= 0100;
/* Don't write out even parity zeros */
if (ch != 0)
mt_buffer[chan][uptr->u6++] = ch;
sim_debug(DEBUG_DATA, dptr, "Write data unit=%d %d %03o\n",
unit, uptr->u6, ch);
uptr->hwmark = uptr->u6;
}
sim_activate(uptr, HT);
return SCPE_OK;
case MT_FSR: /* Space forward one record */
if (BUF_EMPTY(uptr)) {
/* If at end of record, fill buffer */
sim_debug(DEBUG_DETAIL, dptr, "Space unit=%d ", unit);
if (sim_tape_eot(uptr)) {
uptr->u5 &= ~MT_BOT;
sim_debug(DEBUG_DETAIL, dptr, "EOT\n");
sim_activate(uptr, 4000);
return mt_error(uptr, chan, MTSE_EOM, dptr);
}
r = sim_tape_rdrecf(uptr, &mt_buffer[chan][0], &reclen, BUFFSIZE);
if (r != MTSE_OK) {
if (r == MTSE_TMK) {
sim_debug(DEBUG_DETAIL, dptr, "TM ");
reclen = 1;
chan_set_eof(chan);
} else {
sim_debug(DEBUG_DETAIL, dptr, "r=%d ", r);
reclen = 10;
}
}
uptr->u5 &= ~(MT_BOT|MT_EOT);
uptr->hwmark = reclen;
sim_debug(DEBUG_DETAIL, dptr, "%d chars\n", uptr->hwmark);
sim_activate(uptr, uptr->hwmark * HT);
return SCPE_OK;
}
sim_activate(uptr, 4000);
return mt_error(uptr, chan, MTSE_OK, dptr);
case MT_BSR: /* Backspace record */
if (BUF_EMPTY(uptr)) {
/* If at end of record, fill buffer */
sim_debug(DEBUG_DETAIL, dptr, "backspace unit=%d ", unit);
if (sim_tape_bot(uptr)) {
sim_debug(DEBUG_DETAIL, dptr, "BOT\n");
sim_activate(uptr, 100);
return mt_error(uptr, chan, MTSE_BOT, dptr);
}
r = sim_tape_rdrecr(uptr, &mt_buffer[chan][0], &reclen, BUFFSIZE);
if (r != MTSE_OK) {
if (r == MTSE_TMK) {
sim_debug(DEBUG_DETAIL, dptr, "TM ");
reclen = 1;
chan_set_eof(chan);
} else {
reclen = 10;
sim_debug(DEBUG_DETAIL, dptr, "r=%d ", r);
}
}
uptr->u5 &= ~(MT_BOT|MT_EOT);
uptr->hwmark = reclen;
sim_debug(DEBUG_DETAIL, dptr, "%d chars\n", uptr->hwmark);
sim_activate(uptr, uptr->hwmark * HT);
return SCPE_OK;
}
sim_activate(uptr, 4000);
return mt_error(uptr, chan, MTSE_OK, dptr);
case MT_REW: /* Rewind */
sim_debug(DEBUG_DETAIL, dptr, "Rewind unit=%d pos=%d\n", unit,
uptr->pos);
uptr->u5 &= ~(MT_CMD | MT_BIN | MT_IDLE | MT_RDY);
uptr->u5 |= MT_BSY|MT_RDY;
iostatus &= ~(1 << (uptr - mt_unit));
sim_activate(uptr, (uptr->pos/100) + 100);
r = sim_tape_rewind(uptr);
uptr->u5 &= ~MT_EOT;
uptr->u5 |= MT_BOT;
chan_set_end(chan);
return r;
}
return mt_error(uptr, chan, r, dptr);
}