;license:MIT
;(c) 2022 by qkumba

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

    !source "src/prelaunch/common.a"

         +ENABLE_ACCEL
         lda   #$60
         sta   $A37
         jsr   $800        ; find and load "DOS"
         lda   #<callback1
         sta   $B748
         lda   #>callback1
         sta   $B749
         jmp   $B700

callback1
         ldx   #$00
         stx   $9E52
         inx
         stx   $9E53       ; fix reset vector

         lda   #<callback2
         sta   $BD07
         lda   #>callback2
         sta   $BD08
         +DISABLE_ACCEL
         jmp   $9D84

callback2
         pla
         pla
         jsr   $BD5A
         jsr   $BD09
         lda   $BE9F
         sta   $49
         lda   $BE9E
         sta   $48
         ldy   #4
         lda   ($48),y
         tax
         iny
         lda   ($48),y
         ldy   #1
         cpx   #$13
         bne   +
         cmp   #$0E
         bne   ++
         sty   $985D
         sty   $987A       ; fix reset vector
+        cpx   #6
         bne   ++
         cmp   #$0D
         bne   ++
         sty   $400E       ; fix reset vector
++       clc
         rts

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