the10thwiz/cc65
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Correctly map out ROM when needed in the "phantom keys" workaround.

Browse Source
This commit is contained in:
Christian Groessler
2014-04-26 11:55:24 +02:00
parent 54be6de9bc
commit 6307815ada
3 changed files with 55 additions and 33 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
libsrc/c128/mouseref.s
View File

@@ -26,7 +26,7 @@ _pen_adjuster:
.addr IRQStub2
callback: ; callback into mouse driver after ROM IRQ handler has been run
.addr $0000 ; (filled in by mouse driver)
jmp_rom_hdlr: ; "trampoline" to jump to ROM IRQ handler
jmp_rom_hdlr: ; original ROM indirect IRQ handler address
.addr $0000 ; (filled in by mouse driver)
@@ -54,11 +54,17 @@ IRQStub2:
lda #MMU_CFG_CC65 ; MMU configuration which will be active after the ROM handler returns
pha
; map out ROM
ldy MMU_CR
sta MMU_CR
; push address of ROM handler on stack and jump to it
lda jmp_rom_hdlr+1
pha
lda jmp_rom_hdlr
pha
sty MMU_CR ; map in ROM
rts ; jump to ROM handler
; our MMU configuration byte we pushed on the stack before (MMU_CFG_CC65) is now active