Retro/pcjs
Watch
1
0
Fork
You've already forked pcjs
 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Revert back to propagating R0 to the Front Panel data path on a WAIT instruction (per PDP-11 lore)

Browse source
This commit is contained in:
Jeff 2016-11-08 14:21:07 -08:00 • committed by Jeff Parsons
commit f43d1c1745
7 changed files with 642 additions and 617 deletions
Download patch file Download diff file Expand all files Collapse all files

4
apps/pdp11/boot/monitor/BOOTMON.mac
View file

@ -4,7 +4,6 @@
; WANT PERFORMANCE COUNTER - CLOCK TICKS TO DO SOMETHING?
PSW = 177776
CNSW = 177570
DL11XCSR = 177564
DL11VEC = 64
@ -29,8 +28,7 @@ START: RESET
MOV SP,R0
JSR PC,INPUT
CLR R0
1$: MOV R0,@#CNSW ; UPDATE THE FRONT PANEL DATA DISPLAY WITH R0
WAIT
1$: WAIT
INC R0
TST LGHTON
BEQ 1$