mirror of https://github.com/a2-4am/4cade.git
52 lines
998 B
Plaintext
52 lines
998 B
Plaintext
;license:MIT
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;(c) 2021-2022 by qkumba
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!cpu 6502
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!to "build/PRELAUNCH.INDEXED/WILLY.BYTE",plain
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*=$106
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!source "src/prelaunch/common.a"
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+ENABLE_ACCEL
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lda #$60
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sta $426B
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jsr $4000 ; decompress
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lda #<callback1
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sta $BD7C
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lda #>callback1
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sta $BD7D
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lda #$20
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sta $7852
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lda #<callback2
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sta $7853
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lda #>callback2
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sta $7854
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lda #$EA
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sta $7855
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lda #$4C
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sta $B6D8
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ldx #0
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stx $B6D9
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inx
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stx $B6DA ; reset vector
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+DISABLE_ACCEL
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jmp $6000
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callback1
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+ENABLE_ACCEL
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jsr $BD80 ; decompress
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+DISABLE_ACCEL
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lda #0 ; set Z
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rts
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callback2
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sbc $8A
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cmp #8
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beq +
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cmp #9
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+ rts
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!if * > $1C0 {
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!error "code is too large, ends at ", *
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}
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