mirror of https://github.com/a2-4am/4cade.git
60 lines
1.0 KiB
Plaintext
60 lines
1.0 KiB
Plaintext
;license:MIT
|
|
;(c) 2021 by qkumba
|
|
|
|
!cpu 6502
|
|
!to "build/PRELAUNCH.INDEXED/OI",plain
|
|
*=$106
|
|
|
|
!source "src/prelaunch/common.a"
|
|
|
|
jmp main
|
|
|
|
callback2
|
|
jsr $BD5F
|
|
jsr $BD09
|
|
lda $B7EC
|
|
cmp #$10
|
|
bne +
|
|
lda $B7ED
|
|
cmp #9
|
|
bne +
|
|
lda #$AD
|
|
sta $159F
|
|
sta $15C3
|
|
+ pla
|
|
pla
|
|
clc
|
|
rts
|
|
|
|
main
|
|
+ENABLE_ACCEL
|
|
+USES_TEXT_PAGE_2
|
|
lda #$60
|
|
sta $9EF
|
|
jsr $800 ; find and load "DOS"
|
|
lda #<callback1
|
|
sta $B748
|
|
lda #>callback1
|
|
sta $B749
|
|
jmp $B700
|
|
|
|
callback1
|
|
ldx #$00
|
|
stx $9E52
|
|
inx
|
|
stx $9E53
|
|
+GET_MACHINE_STATUS
|
|
and #CHEATS_ENABLED
|
|
beq +
|
|
lda #<callback2
|
|
sta $BD07
|
|
lda #>callback2
|
|
sta $BD08
|
|
+
|
|
+DISABLE_ACCEL
|
|
jmp $9D84
|
|
|
|
!if * > $1C0 {
|
|
!error "code is too large, ends at ", *
|
|
}
|