github.com/simh.simh
1
0
Fork 0
mirror of https://github.com/simh/simh.git synced 2026-03-03 01:58:53 +00:00
Code Releases Activity

PDP11, PDP10, VAX: Fix DMC11 device DDCMP Maintenance packet handling

Browse Source 
1) Assure that Link line carrier is present prior to attempting to transmit
   maintenance packets.
2) Properly set flag bits in maintenance packets.
This commit is contained in:
Mark Pizzolato
2018-11-10 04:34:43 -08:00
parent 3b8fc9d314
commit acbea91524
2 changed files with 4 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
PDP11/pdp11_ddcmp.h
View File

@@ -136,8 +136,8 @@ if (sim_deb && dptr && (reason & dptr->dctrl)) {
}
break;
case DDCMP_DLE: /* Maintenance Message */
sim_debug (reason, dptr, "Maintenance Message, Count: %d, Flags: %s, HDRCRC: %s, DATACRC: %s\n", (msg2 << 8)| msg[1], flag,
(0 == ddcmp_crc16 (0, msg, DDCMP_HEADER_SIZE)) ? "OK" : "BAD", (0 == ddcmp_crc16 (0, msg+DDCMP_HEADER_SIZE, 2+((msg2 << 8)| msg[1]))) ? "OK" : "BAD");
sim_debug (reason, dptr, "Maintenance Message, Count: %d, Flags: %s, Addr: %d, HDRCRC: %s, DATACRC: %s\n", (msg2 << 8)|msg[1], flag, msg[5],
(0 == ddcmp_crc16 (0, msg, DDCMP_HEADER_SIZE)) ? "OK" : "BAD", (0 == ddcmp_crc16 (0, msg+DDCMP_HEADER_SIZE, 2+((msg2 << 8)|msg[1]))) ? "OK" : "BAD");
break;
}
if (DDCMP_DBG_PDAT & dptr->dctrl) {
@@ -413,7 +413,7 @@ static void ddcmp_build_maintenance_packet (uint8 *buf, size_t size)
{
buf[0] = DDCMP_DLE;
buf[1] = size & 0xFF;
buf[2] = ((size >> 8) & 0x3F) | (DDCMP_FLAG_SELECT|DDCMP_FLAG_QSYNC << 6);
buf[2] = ((size >> 8) & 0x3F) | ((DDCMP_FLAG_SELECT|DDCMP_FLAG_QSYNC) << 6);
buf[3] = 0;
buf[4] = 0;
buf[5] = 1;

1
PDP11/pdp11_dmc.c
View File

@@ -871,6 +871,7 @@ DDCMP_STATETABLE DDCMP_TABLE[] = {
{41, Run, {ddcmp_REPMessageSent}, Run, {ddcmp_StartTimer}},
{42, Maintenance, {ddcmp_ReceiveMaintMsg}, Maintenance, {ddcmp_GiveBufferToUser}},
{43, Maintenance, {ddcmp_UserSendMessage,
ddcmp_LineConnected,
ddcmp_TransmitterIdle}, Maintenance, {ddcmp_SendMaintMessage}},
{44, All} /* End of Table */
};