folkert/simh-testsetgenerator
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

PDP8: Change RESET CPU to clear L'AC

Browse source 
As discussed in #400 and described in the maintenance manuals and/or
schematics for all five PDP-8 models (8, 8/S, 8/I, 8/E, 8/A).
This commit is contained in:
Bob Supnik 2017-02-19 21:39:02 -08:00 • committed by Mark Pizzolato
parent c1f228f0b0
commit c02584440b
1 changed files with 2 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
PDP8/pdp8_cpu.c
View file

@ -25,6 +25,7 @@
cpu central processor
13-Feb-17 RMS RESET clear L'AC, per schematics
28-Jan-17 RMS Renamed switch register variable to SR, per request
18-Sep-16 RMS Added alternate dispatch table for non-contiguous devices
17-Sep-13 RMS Fixed boot in wrong field problem (Dave Gesswein)
@ -1372,6 +1373,7 @@ return reason;
t_stat cpu_reset (DEVICE *dptr)
{
saved_LAC = 0;
int_req = (int_req & ~INT_ION) | INT_NO_CIF_PENDING;
saved_DF = IB = saved_PC & 070000;
UF = UB = gtf = emode = 0;