Apple-2-SW/Applecorn
1
0
Fork 0
mirror of https://github.com/bobbimanners/Applecorn.git synced 2024-06-05 16:29:37 +00:00
Code Issues Projects Releases Wiki Activity

Interrupt fixes to macros (applecorn.s)

Browse Source
This commit is contained in:
Bobbi Webber-Manners 2022-09-19 19:25:51 -04:00
parent 50dc6c3e1b
commit 02b4e65cfa
2 changed files with 4 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

BIN
applecorn.po
View File

Binary file not shown.

6
applecorn.s
View File

@ -149,6 +149,7 @@ IENTMAIN MAC
* Enable writing to main memory (for code running in aux)
WRTMAIN MAC
PHP
SEI ; Keeps IRQ handler easy
STA $C004 ; Write to main memory
EOM
@ -156,11 +157,12 @@ WRTMAIN MAC
* Go back to writing to aux (for code running in aux)
WRTAUX MAC
STA $C005 ; Write to aux memory
CLI ; Normal service resumed
PLP ; Normal service resumed
EOM
* Manually enable AltZP (for code running in main)
ALTZP MAC
PHP
SEI ; Disable IRQ when AltZP on
LDA $C08B ; R/W LC bank 1
LDA $C08B
@ -172,7 +174,7 @@ MAINZP MAC
STA $C008 ; Main ZP and LC
LDA $C081 ; Bank ROM back in
LDA $C081
CLI ; Turn IRQ back on
PLP ; Turn IRQ back on
EOM
* Code is all included from PUT files below ...