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PDP11 & Unibus VAX, PDP10: Fix DUP device support for use by internal KMC for TOPS-20

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This fixes a regression caused by commit b41acb3
This commit is contained in:
Trevor Warwick 2022-06-07 17:16:21 +01:00
parent 78f56b24f5
commit 6e0e5a714d
1 changed files with 10 additions and 3 deletions
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13
PDP11/pdp11_dup.c
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@ -74,6 +74,7 @@ static uint16 dup_txdbuf[DUP_LINES];
static t_bool dup_W3[DUP_LINES];
static t_bool dup_W5[DUP_LINES];
static t_bool dup_W6[DUP_LINES];
static t_bool dup_kmc[DUP_LINES]; /* being used by a kmc or other internal simulator device */
static uint32 dup_rxi = 0; /* rcv interrupts */
static uint32 dup_txi = 0; /* xmt interrupts */
static uint32 dup_wait[DUP_LINES]; /* rcv/xmt byte delay */
@ -837,6 +838,7 @@ if (!protocol_DDCMP) {
if (crc_inhibit) {
return SCPE_ARG; /* Must enable CRC for DDCMP */
}
dup_kmc[dup] = TRUE; /* remember we are being used by an internal simulator device */
/* These settings reflect how RSX operates a bare DUP when used for
DECnet communications */
dup_clear(dup, FALSE);
@ -955,6 +957,8 @@ return SCPE_OK;
static t_stat dup_rcv_byte (int32 dup)
{
int32 crcoffset;
sim_debug (DBG_TRC, DUPDPTR, "dup_rcv_byte(dup=%d) - %s, byte %d of %d\n", dup,
(dup_rxcsr[dup] & RXCSR_M_RCVEN) ? "enabled" : "disabled",
dup_rcvpkinoff[dup], dup_rcvpkbytes[dup]);
@ -966,13 +970,15 @@ if (dup_rcv_packet_data_callback[dup]) {
dup_rcv_packet_data_callback[dup](dup, dup_rcvpkbytes[dup]);
return SCPE_OK;
}
/* if we added trailing SYNs, don't include them in the CRC calc */
crcoffset = (dup_kmc[dup] ? 0 : TRAILING_SYNS);
dup_rxcsr[dup] |= RXCSR_M_RXACT;
dup_rxdbuf[dup] &= ~RXDBUF_M_RCRCER;
dup_rxdbuf[dup] &= ~RXDBUF_M_RXDBUF;
dup_rxdbuf[dup] |= dup_rcvpacket[dup][dup_rcvpkinoff[dup]++];
dup_rxcsr[dup] |= RXCSR_M_RXDONE;
if ( ((dup_rcvpkinoff[dup] == 8) ||
(dup_rcvpkinoff[dup] >= dup_rcvpkbytes[dup]-TRAILING_SYNS)) && /* don't include trailing SYNs in CRC calc */
(dup_rcvpkinoff[dup] >= dup_rcvpkbytes[dup]-crcoffset)) &&
(0 == ddcmp_crc16 (0, dup_rcvpacket[dup], dup_rcvpkinoff[dup])))
dup_rxdbuf[dup] |= RXDBUF_M_RCRCER;
else
@ -1083,7 +1089,7 @@ for (dup=active=attached=0; dup < dup_desc.lines; dup++) {
}
memcpy (dup_rcvpacket[dup], buf, size);
dup_rcvpkbytes[dup] = size;
if (dup_parcsr[dup] & PARCSR_M_DECMODE) {
if (!dup_kmc[dup] && (dup_parcsr[dup] & PARCSR_M_DECMODE)) {
memcpy(&(dup_rcvpacket[dup][size]), tsyns, TRAILING_SYNS);
dup_rcvpkbytes[dup] += TRAILING_SYNS ;
}
@ -1235,11 +1241,12 @@ if (dup_ldsc == NULL) { /* First time startup */
++attached;
}
dup_units[dup_desc.lines] = dup_poll_unit_template;
/* Initialize to standard factory Option Jumper Settings */
/* Initialize to standard factory Option Jumper Settings and no associated KMC */
for (i = 0; i < DUP_LINES; i++) {
dup_W3[i] = TRUE;
dup_W5[i] = FALSE;
dup_W6[i] = TRUE;
dup_kmc[i] = FALSE;
}
}
for (i = 0; i < dup_desc.lines; i++) { /* init each line */