mirror of https://github.com/a2-4am/4cade.git
84 lines
1.7 KiB
Plaintext
84 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/THUNDER.BOMBS#06B000",plain
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*=$B000
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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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+LOAD_FILE_KEEP_DIR thunder_bombs, thunder_bombs_dir_e-thunder_bombs_dir_b
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+READ_ROM_NO_WRITE
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lda #$60
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sta $887F
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ldx #3-1
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- lda patch,x
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sta $8819,x
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dex
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bpl -
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jsr $87F9 ; load, show title
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lda #$60
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sta $7818
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jsr $7800 ; unpack/setup
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lda #0
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sta $3F2 ; reset vector B8F2
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sta $3FE ; IRQ vector B8FE
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ldx #3-1
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- lda patch2,x
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sta $789B,x
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sta $78CB,x
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sta $7A8C,x
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sta $7837,x ; set exits
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dex
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bpl -
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lda $323
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jmp $781B
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callback bit $C000
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ldx #$30
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- bit $C055
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lda #$0B
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jsr fakewait ; fix timing of title screen on //gs
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bit $C054
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lda #$0B
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jsr fakewait
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bit $C000
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bmi exit
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dey
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bne -
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dex
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bne -
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jmp $8839
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fakewait sec
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wait1 pha
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wait2 sbc #$01
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bne wait2
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pla
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sbc #$01
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bne wait1
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rts
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exit
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patch2 !byte $4C,$00,$01
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patch !byte $4C,<callback,>callback
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thunder_bombs
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!byte thunder_bombs_e-thunder_bombs_b
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thunder_bombs_b
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thunder_bombs_dir_b
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!text "X"
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thunder_bombs_dir_e
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!text "/THUNDER.BOMBS"
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thunder_bombs_e
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!if * > $B100 {
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!error "code is too large, ends at ", *
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}
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