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https://github.com/a2-4am/4cade.git
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67 lines
1.3 KiB
Plaintext
67 lines
1.3 KiB
Plaintext
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;license:MIT
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;(c) 2021 by Frank M.
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!cpu 6502
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!to "res/DEMO/DUNG.BEETLES",plain
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*=$300
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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_AT title, $00
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lda #$60
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sta $603A
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jsr $6000 ; decompress
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lda #1
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sta $083E ; reset vector patch
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lda #$4C
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sta $847
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lda #0
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sta $848
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lda #$96 ; patch $847 - JMP ($3F2)
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sta $849 ; to JMP $9600
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lda #$60
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sta $847
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jsr $800 ; memory move
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ldx #6-1
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- lda patch, x
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sta $9B93, x
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dex
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bpl - ; disable button support on title screen
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lda #$4C
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sta $9B7D
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sta $97D5
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lda #0
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sta $9B7D+1
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sta $97D5+1
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lda #1
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sta $9B7D+2
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sta $97D5+2 ; set exits
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lda #$D0
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sta $1C17
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sta $12CE
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sta $9B4D
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sta $9B56 ; disable sound
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+DISABLE_ACCEL
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jmp $9600
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patch !byte $A9,$01,$EA,$EA,$EA,$EA
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title !byte x_e-x_b
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x_b !text "X/DUNG.BEETLES/DUNG.BEETLES"
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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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