mirror of
https://github.com/a2-4am/4cade.git
synced 2024-09-28 18:55:36 +00:00
54 lines
1.4 KiB
Plaintext
Executable File
54 lines
1.4 KiB
Plaintext
Executable File
;license:MIT
|
|
;(c) 2019 by 4am/Frank M.
|
|
|
|
!cpu 6502
|
|
!to "build/PRELAUNCH.INDEXED/UD",plain
|
|
*=$106
|
|
|
|
!source "src/prelaunch/common.a"
|
|
|
|
lda #$03 ; reset vector to $103
|
|
sta $2D4E
|
|
lda #$01 ; (game uses the 3 value to set STA $'03'F2
|
|
sta $2D50 ; so reset has to be somewhere $xx03
|
|
sta $2DB1 ; unless you want to waste more time making this reboot)
|
|
|
|
+GET_MACHINE_STATUS
|
|
and #CHEATS_ENABLED
|
|
sta patch+1
|
|
ldx #$2A-1 ; copy patch code to zero page
|
|
- lda patch,x ; (stack will be destroyed by the time we need to patch)
|
|
sta $80,x
|
|
dex
|
|
bpl -
|
|
lda #$80 ; call patch instead of $200
|
|
sta $4054
|
|
lda #$00
|
|
sta $4055 ; updated here for new .po file locations
|
|
jmp $2D2C
|
|
patch
|
|
lda #0 ; SMC
|
|
beq +
|
|
; lives in $1B,X (X=0/1 for player 1/2)
|
|
lda #$B5
|
|
sta $0912 ; patch - don't decrease lives
|
|
+
|
|
lda #$2C
|
|
sta $103
|
|
lda #$82
|
|
sta $104
|
|
lda #$C0
|
|
sta $105
|
|
lda #$4C ; add reboot hook @ $103
|
|
sta $106
|
|
lda #$A6
|
|
sta $107
|
|
lda #$FA
|
|
sta $108
|
|
|
|
jmp $200 ; continue to game
|
|
|
|
!if * > $1C0 {
|
|
!error "code is too large, ends at ", *
|
|
}
|