github.com/open-simh.simh
1
0
Fork 0
mirror of https://github.com/open-simh/simh.git synced 2026-03-03 18:26:48 +00:00
Code Issues Projects Releases Wiki Activity

PDP11, Qbus & Unibus VAX: Fix DUP device loopback on device reset

Browse Source 
- When the DUP TXCSR DEVICE_RESET bit is set, which clears the MAISEL bits, any
existing tmxr loopback must also be removed.
This commit is contained in:
Trevor Warwick
2022-05-18 16:38:10 +01:00
committed by Mark Pizzolato
parent b41acb30c1
commit 775e2f1f79
1 changed files with 2 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
PDP11/pdp11_dup.c
View File

@@ -600,6 +600,8 @@ switch ((PA >> 1) & 03) { /* case on PA<2:1> */
dup_txcsr[dup] |= (data & TXCSR_WRITEABLE);
if (dup_txcsr[dup] & TXCSR_M_DRESET) {
dup_clear(dup, dup_W3[dup]);
/* must also clear loopback if it was set */
tmxr_set_line_loopback (&dup_desc.ldsc[dup], FALSE);
break;
}
if (TXCSR_GETMAISEL(dup_txcsr[dup]) != TXCSR_GETMAISEL(orig_val)) { /* Maint Select Changed */