;license:MIT
;(c) 2022 by qkumba, Frank M.

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

    !source "src/macros.a"

         inc   $3F4       ; force reboot on reset

         +READ_RAM2_NO_WRITE
         jsr   EnableAccelerator
         lda   MachineStatus
         and   #CHEATS_ENABLED
         sta   cheat_smc1+1
         sta   cheat_smc2+1
         lda   WaitForVBL
         cmp   #$60
         php
         +READ_ROM_NO_WRITE
         lda   #$60
         sta   $13B8
         jsr   $1200      ; decompress

         lda   #<callback1
         sta   $FE06
         lda   #<callback2
         sta   $FD26
         lda   #>callback1
         sta   $FE07
         sta   $FD27
         plp
         bne   @good_vbl
         ldx   #<callback3
         stx   $FD6A
         sta   $FD6B

@good_vbl
         jmp   $EE00

callback1
cheat_smc1
         lda   #0
         beq   +
         dec   $2D0E      ; patch - don't decrease time
+
         +READ_RAM2_NO_WRITE
         jsr   DisableAccelerator
         +READ_RAM1_WRITE_RAM1
         jmp   $4906

callback2
         jsr   $FF24
cheat_smc2
         lda   #0
         beq   +
         lda   #$a5
         sta   $2612      ; patch - don't decrease lives
+
         rts

callback3
         lda   #$60       ; if VBL disabled in TR
         sta   $4ED       ; then disable VBL in game
         jmp   $F924

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