t_stat inq_io (int32 flag, int32 mod)
{
int32 i, t, wm_seen = 0;
ind[IN_INC] = 0; /* clear inq clear */
switch (mod) { /* case on mod */
case BCD_R: /* input */
/* if (ind[IN_INR] == 0) return SCPE_OK; /* return if no req */
ind[IN_INR] = 0; /* clear req */
puts_tty ("[Enter]\r\n"); /* prompt */
for (i = 0; M[BS] != (BCD_GRPMRK + WM); i++) { /* until GM + WM */
while (((t = sim_poll_kbd ()) == SCPE_OK) ||
(t & SCPE_BREAK)) {
if (stop_cpu) return SCPE_STOP; } /* interrupt? */
if (t < SCPE_KFLAG) return t; /* if not char, err */
t = t & 0177;
if ((t == '\r') || (t == '\n')) break;
if (t == inq_char) { /* cancel? */
ind[IN_INC] = 1; /* set indicator */
puts_tty ("\r\n[Canceled]\r\n");
return SCPE_OK; }
if (i && ((i % INQ_WIDTH) == 0)) puts_tty ("\r\n");
sim_putchar (t); /* echo */
if (flag == MD_WM) { /* word mark mode? */
if ((t == '~') && (wm_seen == 0)) wm_seen = WM;
else {
M[BS] = wm_seen | ascii_to_bcd[t];
wm_seen = 0; } }
else M[BS] = (M[BS] & WM) | ascii_to_bcd[t];
if (!wm_seen) BS++;
if (ADDR_ERR (BS)) {
BS = BA | (BS % MAXMEMSIZE);
return STOP_NXM; } }
puts_tty ("\r\n");
M[BS++] = BCD_GRPMRK + WM;
return SCPE_OK;
case BCD_W: /* output */
for (i = 0; (t = M[BS++]) != (BCD_GRPMRK + WM); i++) {
if ((flag == MD_WM) && (t & WM)) {
if (i && ((i % INQ_WIDTH) == 0)) puts_tty ("\r\n");
sim_putchar ('~'); }
if (i && ((i % INQ_WIDTH) == 0)) puts_tty ("\r\n");
sim_putchar (bcd_to_ascii[t & CHAR]);
if (ADDR_ERR (BS)) {
BS = BA | (BS % MAXMEMSIZE);
return STOP_NXM; } }
puts_tty ("\r\n");
return SCPE_OK;
default:
return STOP_INVM; } /* invalid mod */
}
t_stat dp_io (int32 fnc, int32 flg, int32 mod)
{
int32 dcf, drv, sec, psec, cnt, qwc, qzr, diff;
UNIT *uptr;
t_stat r;
dcf = BS; /* save DCF addr */
qwc = 0; /* not wcheck */
ind[IN_DPW] = ind[IN_LNG] = ind[IN_UNA] = 0; /* clr indicators */
ind[IN_DSK] = ind[IN_ACC] = ind[IN_DBY] = 0;
if (sim_is_active (&dp_unit[0])) { /* ctlr busy? */
ind[IN_DBY] = ind[IN_DSK] = 1; /* set indicators */
return SCPE_OK; } /* done */
AS = dcf + 6; /* AS for most ops */
BS = dcf + DCF_CNT - 1; /* minimum DCF */
if (ADDR_ERR (BS)) return STOP_WRAP; /* DCF in memory? */
if (M[dcf] & BBIT) drv = M[dcf + DCF_SEC + 1] & 0xE; /* impl sel? cyl 8-4-2 */
else drv = M[dcf] & DIGIT; /* get drive sel */
if ((drv == 0) || (drv & 1) || (drv > BCD_ZERO)) /* bad drive #? */
return STOP_INVDSK;
drv = bcd_to_bin[drv] >> 1; /* convert */
uptr = dp_dev.units + drv; /* get unit ptr */
if ((uptr->flags & UNIT_ATT) == 0) { /* attached? */
ind[IN_DSK] = ind[IN_ACC] = 1; /* no, error */
CRETIOE (iochk, SCPE_UNATT); }
if ((fnc == FNC_SEEK) && /* seek and */
(M[dcf + DCF_DIR_FL] & DCF_DSEEK) == DCF_DSEEK) { /* direct flag? */
diff = dp_cvt_bcd (dcf + DCF_DIR, DCF_DIR_LEN); /* cvt diff */
if (diff < 0) return STOP_INVDSC; /* error? */
diff = diff >> 1; /* diff is *2 */
if ((M[dcf + DCF_DIR + DCF_DIR_LEN - 1] & ZONE) == BBIT)
diff = -diff; /* get sign */
uptr->CYL = uptr->CYL + diff; /* bound seek */
if (uptr->CYL < 0) uptr->CYL = 0;
else if (uptr->CYL >= DP_NUMCY) { /* too big? */
uptr->CYL = 0; /* system hangs */
return STOP_INVDCY; }
sim_activate (&dp_unit[0], dp_time); /* set ctlr busy */
return SCPE_OK; } /* done! */
t_stat mt_io (int32 unit, int32 flag, int32 mod)
{
int32 t, wm_seen;
t_mtrlnt i, tbc;
t_stat st;
t_bool passed_eot;
UNIT *uptr;
ind[IN_TAP] = 0; /* clear error */
if ((uptr = mt_sel_unit (unit)) == NULL) /* sel unit, save */
return STOP_INVMTU; /* (not valid) */
if ((uptr->flags & UNIT_ATT) == 0) /* attached? */
return SCPE_UNATT;
switch (mod) {
case BCD_R: /* read */
if (DEBUG_PRS (mt_dev))
fprintf (sim_deb, ">>MT%d: read from %d", unit, BS);
wm_seen = 0; /* no word mk seen */
st = sim_tape_rdrecf (uptr, dbuf, &tbc, MT_MAXFR); /* read rec */
if (st != MTSE_TMK) { /* not tmk? */
if (st == MTSE_RECE) /* rec in error? */
ind[IN_TAP] = 1;
else if (st != MTSE_OK) { /* stop on error */
if (DEBUG_PRS (mt_dev))
fprintf (sim_deb, ", stopped by status = %d\n", st);
break;
}
if (!(flag & MD_BIN) && /* BCD tape and */
((dbuf[0] & CHAR) == BCD_TAPMRK)) /* first char TMK? */
uptr->IND = 1; /* set indicator */
}
for (i = 0; i < tbc; i++) { /* loop thru buf */
if (!(flag & MD_BOOT) && /* not boot? check */
(M[BS] == (BCD_GRPMRK + WM))) { /* GWM in memory? */
if (DEBUG_PRS (mt_dev))
fprintf (sim_deb, " to %d, stopped by GMWM\n", BS);
BS++; /* incr BS */
if (ADDR_ERR (BS)) { /* test for wrap */
BS = BA | (BS % MAXMEMSIZE);
return STOP_WRAP;
}
return SCPE_OK; /* done */
}
t = dbuf[i] & CHAR; /* get char, strip parity */
if (!(flag & MD_BIN) && (t == BCD_ALT)) /* BCD mode alt blank? */
t = BCD_BLANK; /* real blank */
if (flag & MD_WM) { /* word mk mode? */
if ((t == BCD_WM) && (wm_seen == 0)) /* WM char, none prev? */
wm_seen = WM; /* set flag */
else {
M[BS] = wm_seen | (t & CHAR); /* char + wm seen */
wm_seen = 0; /* clear flag */
}
}
else M[BS] = (M[BS] & WM) | (t & CHAR); /* preserve mem WM */
if (!wm_seen)
BS++;
if (ADDR_ERR (BS)) { /* check next BS */
BS = BA | (BS % MAXMEMSIZE);
return STOP_WRAP;
}
}
if (M[BS] != (BCD_GRPMRK + WM)) { /* not GM+WM at end? */
if (flag & MD_WM) /* LCA: clear WM */
M[BS] = BCD_GRPMRK;
else M[BS] = (M[BS] & WM) | BCD_GRPMRK; /* MCW: save WM */
}
if (DEBUG_PRS (mt_dev))
fprintf (sim_deb, " to %d, stopped by EOR\n", BS);
BS++; /* adv BS */
if (ADDR_ERR (BS)) { /* check final BS */
BS = BA | (BS % MAXMEMSIZE);
return STOP_WRAP;
}
break;
case BCD_W:
if (sim_tape_wrp (uptr)) /* locked? */
return STOP_MTL;
if (M[BS] == (BCD_GRPMRK + WM)) /* eor? */
return STOP_MTZ;
if (DEBUG_PRS (mt_dev))
fprintf (sim_deb, ">>MT%d: write from %d", unit, BS);
for (tbc = 0; (t = M[BS++]) != (BCD_GRPMRK + WM); ) {
if ((t & WM) && (flag & MD_WM)) /* WM in wm mode? */
dbuf[tbc++] = BCD_WM;
if (((t & CHAR) == BCD_BLANK) && !(flag & MD_BIN))
dbuf[tbc++] = BCD_ALT;
else dbuf[tbc++] = t & CHAR;
if (ADDR_ERR (BS)) { /* check next BS */
BS = BA | (BS % MAXMEMSIZE);
return STOP_WRAP;
}
}
if (DEBUG_PRS (mt_dev))
fprintf (sim_deb, " to %d\n", BS - 1);
passed_eot = sim_tape_eot (uptr); /* passed EOT? */
st = sim_tape_wrrecf (uptr, dbuf, tbc); /* write record */
if (!passed_eot && sim_tape_eot (uptr)) /* just passed EOT? */
ind[IN_END] = 1;
if (ADDR_ERR (BS)) { /* check final BS */
BS = BA | (BS % MAXMEMSIZE);
return STOP_WRAP;
}
break;
default:
return STOP_INVM;
}
return mt_map_status (st);
}
