mirror of https://github.com/a2-4am/4cade.git
64 lines
1.3 KiB
Plaintext
64 lines
1.3 KiB
Plaintext
;license:MIT
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;(c) 2021-2022 by Frank M., qkumba
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!cpu 6502
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!to "build/DEMO/GALAXIAN#060320",plain
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*=$320
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!source "src/constants.a" ; no code in these
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!source "src/macros.a"
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+ENABLE_ACCEL_LC
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+LOAD_XSINGLE title
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lda #$60
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sta $5813
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jsr $5800 ; decompress
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ldx #0
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stx $83F
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inx
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stx $847 ; reset vector fix
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lda #$2C
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sta $1909
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sta $190C ; ignore joystick buttons
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ldx #5-1
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- lda patch1, x
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sta $8E5, x ; exit on keypress during title screen
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lda patch2, x
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sta $E50, x ; exit on keypress during demo
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dex
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bpl -
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lda #<callback
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sta $8FF+1
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lda #>callback
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sta $8FF+2 ; set exit at end of demo cycle
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+DISABLE_ACCEL
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jmp $800
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callback dec count
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bne +
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ldx #0
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stx $8FF+1
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inx
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stx $8FF+2 ; exit after 3 times
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+ jmp $A00
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count !byte $03
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patch1 !byte $10,$05,$4C,$00,$01
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patch2 !byte $10,$49,$4C,$00,$01
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title !byte x_e-x_b
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x_b !text "GALAXIAN"
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x_e
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!if * > $3F0 {
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!error "code is too large, ends at ", *
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}
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