rom4x/rom5x/options/mame/B0_C500_MAME_no_35_1.s

13 lines
322 B
ArmAsm

; remove 3.5" functionality for MAME
; this bit causes slot 5 boot to go to do 6 boot instead
; and also overwrites the firmware protocol bits to not
; identify as a block device.
.code
.include "iic+.defs"
.org $c500
ldx #$00
lda #$c6
stx $00
sta $01
jmp ($00)