mirror of https://github.com/a2-4am/4cade.git
99 lines
2.0 KiB
Plaintext
99 lines
2.0 KiB
Plaintext
;license:MIT
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;(c) 2021 by Frank M.
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!cpu 6502
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!to "res/DEMO/GUMBALL",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
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ldx #0 ; read to main memory
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stx ldrhi
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stx ldrlo
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+LDADDR title
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jsr iLoadFileDirect
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ldx #10-1 ; we also need to copy the length byte
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- lda newpath,x
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sta $BFD0,x
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dex
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bpl -
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lda #$60
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sta $851
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jsr $800 ; load "DOS"
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lda #$20
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sta $B21E
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lda #<callback1
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sta $B21F
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lda #>callback1
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sta $B220
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+DISABLE_ACCEL
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jmp $B2F1 ; stage 1 (title screen and credits)
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callback1
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lda #$A5 ; restore original code so callback
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sta $B21E ; won't be called more than once
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lda #$5F
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sta $B21F
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lda #$0A
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sta $B220
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lda #$4C
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sta $0DFB
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lda #0
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sta $0DFB+1
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lda #1
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sta $0DFB+2 ; exit on button press or keypress
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lda #<callback2
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sta $0FD0+1
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lda #>callback2
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sta $0FD0+2 ; continue to demo stage 2 after end of demo stage 1
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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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lda #$4C
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sta $B22B
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lda #<callback3
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sta $B22B+1
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lda #>callback3
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sta $B22B+2
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jmp $E02
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callback3
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lda #$4C
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sta $0DF6
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sta $12F6
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lda #0
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sta $0DF6+1
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sta $12F6+1
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lda #1
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sta $0DF6+2
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sta $12F6+2 ; stage 2 (demo play) - set exits
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jmp $31F9
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newpath
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!byte 9
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!text "X/GUMBALL"
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title !byte x_e-x_b
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x_b !text "X/GUMBALL/GUMBALL"
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x_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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