4cade/src/prelaunch/plasmania.a

;license:MIT
;(c) 2019-2020 by qkumba/Frank M.

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

    !source "src/macros.a"

         +ENABLE_ACCEL
         +USES_TEXT_PAGE_2
         lda   #>(callback1-1)
         sta   $84E
         lda   #<(callback1-1)
         sta   $851
         jmp   $800

callback2
         php
         sei
         jsr   $72ED
         plp
         rts

callback1
         lda   #<callback2
         sta   $7353
         lda   #>callback2
         sta   $7354
         lda   #$4C
         sta   $6F31      ; patch - fix bug causing stack overflow
         sta   $8E99      ; patch - fix bug causing stack overflow
         sta   $8E9A      ; patch - fix bug causing stack overflow
         +READ_RAM2_NO_WRITE
         lda   MachineStatus
         and   #CHEATS_ENABLED
         beq   +
         lda   #$a5
         sta   $92D7      ; patch - don't decrease lives
+
         jsr   DisableAccelerator
         +READ_ROM_NO_WRITE
         jmp   $6000

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