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https://github.com/a2-4am/4cade.git
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66 lines
1.4 KiB
Plaintext
66 lines
1.4 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/SPACE.EGGS",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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+NEW_RESET_VECTOR $280
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lda #$60
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sta $2056
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jsr $2000 ; decompress
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lda #$EA
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sta $4821
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sta $4821+1
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sta $4821+2
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sta $4821+3
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sta $4821+4
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sta $4821+5 ; avoid clobbering stack
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lda #$AD
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sta $4B00
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lda #0
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sta $4B00+1
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lda #$C0
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sta $4B00+2 ; change button press detection to keypress detection
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lda #$4C
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sta $4B06
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lda #0
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sta $4B06+1
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lda #1
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sta $4B06+2 ; exit on keypress
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ldx #11-1
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- lda patch, x
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sta $4BD6, x
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dex
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bpl - ; decrement custom counter after demo cycle and eventually exit
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lda #$02
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sta $4BFF ; initialize custom counter
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+DISABLE_ACCEL
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jmp $4880
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patch !byte $CE,$FF,$4B,$10,$03,$4C,$00,$01,$4C,$B0,$4B
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title !byte x_e-x_b
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x_b !text "X/SPACE.EGGS/SPACE.EGGS"
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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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