4cade/src/prelaunch/thexder.a

;license:MIT
;(c) 2019-2020, 2022 by qkumba/Frank M.

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

    !source "src/prelaunch/common.a"

         lda   #$60
         sta   $346
         jsr   $300
         +READ_RAM2_NO_WRITE
         jsr   EnableAccelerator
         lda   MachineStatus
         +READ_ROM_NO_WRITE
         and   #CHEATS_ENABLED
         php
         lda   $13A8
         cmp   #$4C
         bne   +
         lda   #$60
         sta   $13A8
         jsr   $1200
         +RESET_VECTOR reset
         lda   #<reset
         sta   $47FC
         lda   #>reset
         sta   $47FD      ; moved to LC $FFFC/D
         plp
         beq   ++
         dec   $37ED      ; don't decrease energy
         dec   $3FB4      ; don't decrease energy
         dec   $401A      ; don't decrease energy
         beq   ++         ; always

reset
         +READ_ROM_NO_WRITE
         jmp   $FAA6

+        inc   $3F4       ; force reboot
         lda   #$60
         sta   $13B3
         jsr   $1200
         plp
         beq   ++
         dec   $38D2      ; don't decrease energy
         dec   $40A6      ; don't decrease energy
         dec   $410C      ; don't decrease energy
++
         +DISABLE_ACCEL
         jmp   $1800

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