mirror of https://github.com/a2-4am/4cade.git
54 lines
1.4 KiB
Plaintext
Executable File
54 lines
1.4 KiB
Plaintext
Executable File
;license:MIT
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;(c) 2019 by 4am/Frank M.
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!cpu 6502
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!to "build/PRELAUNCH.INDEXED/UD",plain
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*=$106
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!source "src/prelaunch/common.a"
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lda #$03 ; reset vector to $103
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sta $2D4E
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lda #$01 ; (game uses the 3 value to set STA $'03'F2
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sta $2D50 ; so reset has to be somewhere $xx03
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sta $2DB1 ; unless you want to waste more time making this reboot)
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+GET_MACHINE_STATUS
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and #CHEATS_ENABLED
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sta patch+1
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ldx #$2A-1 ; copy patch code to zero page
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- lda patch,x ; (stack will be destroyed by the time we need to patch)
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sta $80,x
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dex
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bpl -
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lda #$80 ; call patch instead of $200
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sta $4054
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lda #$00
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sta $4055 ; updated here for new .po file locations
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jmp $2D2C
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patch
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lda #0 ; SMC
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beq +
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; lives in $1B,X (X=0/1 for player 1/2)
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lda #$B5
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sta $0912 ; patch - don't decrease lives
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+
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lda #$2C
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sta $103
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lda #$82
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sta $104
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lda #$C0
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sta $105
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lda #$4C ; add reboot hook @ $103
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sta $106
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lda #$A6
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sta $107
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lda #$FA
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sta $108
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jmp $200 ; continue to game
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!if * > $1C0 {
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!error "code is too large, ends at ", *
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}
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