mirror of
https://github.com/a2-4am/4cade.git
synced 2024-11-28 16:51:04 +00:00
33 lines
857 B
Plaintext
33 lines
857 B
Plaintext
|
;license:MIT
|
||
|
|
;(c) 2019 by 4am
|
||
|
|
|
||
|
|
!cpu 6502
|
||
|
|
!to "build/PRELAUNCH/TWERPS",plain
|
||
|
|
*=$106
|
||
|
|
|
||
|
|
!source "src/prelaunch/common.a"
|
||
|
|
|
||
|
|
+GET_MACHINE_STATUS
|
||
|
|
and #CHEATS_ENABLED
|
||
|
|
sta patch+1
|
||
|
|
ldx #(end_patch-patch-1) ; copy patch code to zero page (stack will be destroyed by the time we need to patch)
|
||
|
|
- lda patch,x
|
||
|
|
sta $100-end_patch+patch,x
|
||
|
|
dex
|
||
|
|
bpl -
|
||
|
|
lda #($100-end_patch+patch)
|
||
|
|
sta $1DF6
|
||
|
|
lda #$00
|
||
|
|
sta $1DF7
|
||
|
|
jmp $1D97 ; decompress and show title
|
||
|
|
patch
|
||
|
|
lda #0 ; SMC
|
||
|
|
beq +
|
||
|
|
lda #$AD
|
||
|
|
sta $0640 ; patch - don't decrease lives
|
||
|
|
sta $0774 ; patch - don't decrease lives
|
||
|
|
sta $0F05 ; patch - don't decrease lives
|
||
|
|
+
|
||
|
|
jmp $0400
|
||
|
|
end_patch
|