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Added logic to detect DCD/DSR transitions and a placeholder where this detail should be reported to the OS.

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This commit is contained in:
Mark Pizzolato
2013-06-08 07:54:51 -07:00
parent c06c47e2e0
commit 266447ae63
1 changed files with 16 additions and 3 deletions
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19
PDP11/pdp11_kmc.c
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@@ -195,7 +195,7 @@ t_stat dma_read(int32 ba, uint8* data, int length)
#define MAXQUEUE 16 /* Number of rx bdl's we can handle. */
#define MAXMSG 2000 /* Largest message we handle. */
#define MAXMSG (6+2+8192+2) /* Largest message we handle = DDCMP header+BCC+Data+BCC. */
/* local variables: */
@@ -210,7 +210,8 @@ int kmc_txi;
uint16 kmc_microcode[KMC_CRAMSIZE];
struct dupblock {
int32 dupnumber; /* Line Number of all DUP11's on Unibus */
int32 dupnumber; /* Line Number amongst all DUP11's on Unibus (-1 == unassigned) */
int32 linkstate; /* Line Link Status (i.e. 1 when DCD/DSR is on, 0 otherwise */
uint32 rxqueue[MAXQUEUE]; /* Queue of bd's to receive into. */
uint32 rxcount; /* No. bd's in above. */
uint32 rxnext; /* Next bd to receive into. */
@@ -728,6 +729,7 @@ void kmc_doinput(void)
*/
sim_debug(DF_CMD, &kmc_dev, "Running DDCMP in full duplex on Line %d (dup %d):\n", line, d->dupnumber);
dup_set_DDCMP (d->dupnumber, TRUE);
d->linkstate = 0; /* Link not up yet. */
dup_set_DTR (d->dupnumber, (kmc_sel6 & 0400) ? TRUE : FALSE);
dup_set_callback_mode (d->dupnumber, dup_receive, dup_send_complete);
break;
@@ -960,8 +962,15 @@ t_stat kmc_svc (UNIT* uptr)
{
int dupno;
dupno = uptr->u3;
for (dupno=0; dupno<MAXDUP; dupno++) {
int32 linkstate = dup_get_DCD (dupno);
if ((dup[dupno].dupnumber != -1) &&
(linkstate != dup[dupno].linkstate)) {
/* Here is where we must notify the OS of the link state transition... FIXME */
dup[dupno].linkstate = linkstate;
}
}
if (kmc_output) {
kmc_tryoutput(); /* Try to do an output transaction. */
}
@@ -975,6 +984,10 @@ t_stat kmc_svc (UNIT* uptr)
t_stat kmc_reset(DEVICE* dptr)
{
int dupno;
for (dupno=0; dupno<MAXDUP; dupno++)
dup[dupno].dupnumber = -1;
kmc_sel0 = 0;
kmc_sel2 = 0;
kmc_sel4 = 0;