;license:MIT
;(c) 2020 by qkumba

!cpu 6502
!to "build/PRELAUNCH.INDEXED/MI",plain
*=$106

    !source "src/prelaunch/common.a"

         +ENABLE_ACCEL
         lda   #<callback
         sta   $916F
         lda   #>callback
         sta   $9170
         jmp   $5B00      ; decompress

callback
         +GET_MACHINE_STATUS
         and   #CHEATS_ENABLED
         beq   +
         dec   $7822      ; patch - don't increase lives
         lda   #<cheat
         sta   $B418
         lda   #>cheat
         sta   $B419
+        +DISABLE_ACCEL
         jmp   $1183

cheat
         +ENABLE_ACCEL
         jsr   $BD00
         lda   $B43B
         cmp   #$0a
         bne   +
         dec   $8F0E      ; patch - don't decrease lives
         beq   ++

+        cmp   #$0c
         bne   +
         dec   $9DC6      ; patch - don't decrease lives
         beq   ++

+        cmp   #$0f
         bne   +
         dec   $99BB      ; patch - don't decrease lives
         beq   ++

+        cmp   #$11
         bne   ++
         dec   $87CC      ; patch - don't decrease lives
         dec   $88DF      ; patch - don't decrease lives
         dec   $99BB      ; patch - don't decrease lives

++       +DISABLE_ACCEL
         clc
         rts

!if * > $1C0 {
  !error "code is too large, ends at ", *
}