4cade/src/prelaunch/conquering.worlds.a
2022-05-20 11:42:13 -07:00

65 lines
1.2 KiB
Plaintext

;license:MIT
;(c) 2022 by qkumba
!cpu 6502
!to "build/PRELAUNCH.INDEXED/CQ",plain
*=$106
!source "src/prelaunch/common.a"
+ENABLE_ACCEL
lda #$60
sta $A37
jsr $800 ; find and load "DOS"
lda #<callback1
sta $B748
lda #>callback1
sta $B749
jmp $B700
callback1
ldx #$00
stx $9E52
inx
stx $9E53 ; fix reset vector
lda #<callback2
sta $BD07
lda #>callback2
sta $BD08
+DISABLE_ACCEL
jmp $9D84
callback2
pla
pla
jsr $BD5A
jsr $BD09
lda $BE9F
sta $49
lda $BE9E
sta $48
ldy #4
lda ($48),y
tax
iny
lda ($48),y
ldy #1
cpx #$13
bne +
cmp #$0E
bne ++
sty $985D
sty $987A ; fix reset vector
+ cpx #6
bne ++
cmp #$0D
bne ++
sty $400E ; fix reset vector
++ clc
rts
!if * > $1C0 {
!error "code is too large, ends at ", *
}