mirror of https://github.com/a2-4am/4cade.git
79 lines
1.7 KiB
Plaintext
79 lines
1.7 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/GUMBALL#060210",plain
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*=$210
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!source "src/constants.a" ; no code in these
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!source "src/macros.a"
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+READ_RAM2_WRITE_RAM2
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jsr EnableAccelerator
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+LOAD_FILE_KEEP_DIR gumball, gumball_dir_e-gumball_dir_b
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lda #$60
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sta $851
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jsr $800 ; load "DOS"
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ldx #3-1
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- lda patch2,x
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sta $B21E,x
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dex
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bpl -
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+DISABLE_ACCEL
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jmp $B2F1 ; stage 1 (title screen and credits)
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callback1
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ldx #3-1
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- lda patch3,x ; restore original code so callback
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sta $B21E,x ; won't be called more than once
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lda patch4,x
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sta $0DFB,x ; exit on button press or keypress
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lda patch5,x
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sta $0FD0,x ; continue to demo stage 2 after end of demo stage 1
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dex
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bpl -
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lda $5F
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asl
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bne +
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dec $E09
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+ rts
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callback2
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ldx #3-1
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- lda patch,x
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sta $B22B,x
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dex
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bpl -
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jmp $E02
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patch !byte $4C,<callback3,>callback3
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callback3
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ldx #3-1
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- lda patch4,x
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sta $0DF6,x
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sta $12F6,x ; stage 2 (demo play) - set exits
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dex
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bpl -
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jmp $31F9
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patch2 !byte $20,<callback1,>callback1
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patch3 !byte $A5,$5F,$0A
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patch4 !byte $4C,$00,$01
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patch5 !byte $4C,<callback2,>callback2
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gumball !byte gumball_e-gumball_b
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gumball_b
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gumball_dir_b
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!text "X/GUMBALL"
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gumball_dir_e
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!text "/GUMBALL"
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gumball_e
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!if * > $300 {
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!error "code is too large, ends at ", *
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}
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