mirror of
https://github.com/a2-4am/4cade.git
synced 2024-10-20 03:24:29 +00:00
66 lines
1.2 KiB
Plaintext
66 lines
1.2 KiB
Plaintext
;license:MIT
|
|
;(c) 2021 by qkumba
|
|
|
|
!cpu 6502
|
|
!to "build/PRELAUNCH.INDEXED/VIDEO.VEGAS",plain
|
|
*=$106
|
|
|
|
!source "src/prelaunch/common.a"
|
|
|
|
lda #$60
|
|
sta $9E5
|
|
jsr $800 ; load "DOS"
|
|
lda #>callback1
|
|
sta $E079
|
|
lda #<callback1
|
|
sta $E078
|
|
jmp $E03A
|
|
|
|
callback1
|
|
lda #$A6
|
|
sta $3DD
|
|
lda #$FA
|
|
sta $3DE
|
|
lda #$60
|
|
sta $E0BC
|
|
jsr $E083
|
|
lda #>callback2
|
|
sta $D402
|
|
lda #<callback2
|
|
sta $D401
|
|
lda #$00
|
|
ldx #$0F
|
|
jmp $D000
|
|
nop ; move out of overwritten range
|
|
|
|
callback2
|
|
jsr $D432
|
|
ldy $DFD4
|
|
lda $DFD3
|
|
beq checksec
|
|
cmp #4
|
|
bne nottrack
|
|
cpy #$0A
|
|
bne nottrack
|
|
lda #$A6
|
|
sta $A42F
|
|
lda #$FA
|
|
sta $A430
|
|
bne nottrack
|
|
|
|
checksec
|
|
cpy #$0D
|
|
bne nottrack
|
|
lda #$A6
|
|
sta $3DD
|
|
lda #$FA
|
|
sta $3DE
|
|
|
|
nottrack
|
|
clc
|
|
jmp $D403
|
|
|
|
!if * > $1C0 {
|
|
!error "code is too large, ends at ", *
|
|
}
|