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Fixed VAX8600 simulator boot from console without an attach disk to report a useful error instead of crashing

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This commit is contained in:
Mark Pizzolato 2013-04-11 08:46:09 -07:00
parent e0225c336a
commit 1936f7ff75
1 changed files with 12 additions and 0 deletions
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12
VAX/vax860_stddev.c
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@ -1098,6 +1098,12 @@ switch (rlcs_state) {
case RL_READ:
if ((cso_csr & CSR_DONE) == 0) { /* buf ready? */
if (rlcs_bcnt == 0) { /* read in whole block */
if ((uptr->flags & UNIT_ATT) == 0) { /* Attached? */
cso_csr = cso_csr | CSR_DONE | /* error */
(RLST_HDERR << STXCS_V_STS);
rlcs_state = RL_IDLE; /* now idle */
break;
}
da = STXCS_GETDA(cso_csr) * 512; /* get byte offset */
if (sim_fseek (uptr->fileref, da, SEEK_SET))
return SCPE_IOERR;
@ -1124,6 +1130,12 @@ switch (rlcs_state) {
break;
case RL_WRITE:
if ((uptr->flags & UNIT_ATT) == 0) { /* Attached? */
cso_csr = cso_csr | CSR_DONE | /* error */
(RLST_HDERR << STXCS_V_STS);
rlcs_state = RL_IDLE; /* now idle */
break;
}
if (rlcs_bcnt < RL_NUMBY) { /* more data to buffer? */
cso_csr = cso_csr | CSR_DONE | /* continue */
(RLST_CONT << STXCS_V_STS);