mirror of
https://github.com/a2-4am/4cade.git
synced 2024-09-28 18:55:36 +00:00
74 lines
1.7 KiB
Plaintext
74 lines
1.7 KiB
Plaintext
;license:MIT
|
|
;(c) 2020, 2022 by qkumba
|
|
|
|
!cpu 6502
|
|
!to "build/PRELAUNCH/SPIKES.CHEAT",plain
|
|
*=$250
|
|
|
|
!source "src/constants.a" ; no code in these
|
|
!source "src/macros.a"
|
|
|
|
+ENABLE_ACCEL
|
|
lda #$60
|
|
sta $99A
|
|
sta $A15
|
|
sta $A84
|
|
sta $BE3
|
|
jsr $900 ; decompress
|
|
lda #<callback3
|
|
sta $8B1
|
|
lda #<callback1
|
|
sta $9501
|
|
lda #<callback2
|
|
sta $95B1
|
|
lda #>callback1
|
|
sta $8B2
|
|
sta $9502
|
|
sta $95B2
|
|
jmp $9500
|
|
|
|
callback1
|
|
+READ_RAM2_NO_WRITE
|
|
jsr EnableAccelerator
|
|
jsr $9503
|
|
+DISABLE_ACCEL
|
|
jsr $BC6C
|
|
sta $C010
|
|
|
|
callback2
|
|
+READ_RAM2_NO_WRITE
|
|
jsr EnableAccelerator
|
|
jsr $BC7B
|
|
|
|
+READ_RAM2_NO_WRITE
|
|
lda MachineStatus
|
|
and #CHEATS_ENABLED
|
|
beq +
|
|
lda #$ad
|
|
sta $6AB0 ; patch - don't decrease fuel
|
|
sta $6B5C ; patch - don't decrease lives
|
|
+
|
|
jsr DisableAccelerator
|
|
+READ_ROM_NO_WRITE
|
|
lda #$30
|
|
jsr $FCA8 ; allow joystick timers to expire
|
|
jmp $A00
|
|
|
|
callback3
|
|
+READ_RAM2_NO_WRITE
|
|
jsr EnableAccelerator
|
|
jsr $BDFC
|
|
|
|
+READ_RAM2_NO_WRITE
|
|
lda MachineStatus
|
|
and #CHEATS_ENABLED
|
|
beq +
|
|
lda #$ad
|
|
sta $6D9B ; patch - don't decrease fuel
|
|
sta $7EA0 ; patch - don't decrease lives
|
|
sta $8AF1 ; patch - don't decrease lives
|
|
+
|
|
jsr DisableAccelerator
|
|
+READ_ROM_NO_WRITE
|
|
jmp $8D00
|