4cade/src/prelaunch/serpentine.a

;license:MIT
;(c) 2019-2020 by 4am

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

         !source "src/prelaunch/common.a"

         +NEW_RESET_VECTOR $3C0
         ldx   #$0E       ; copy patch code to zero page (stack will be destroyed by the time we need to patch)
-        lda   patch,x
         sta   $3B0,x
         dex
         bpl   -
         lda   #$B0       ; call patch instead of $233
         sta   $8C96
         lda   #$03
         sta   $8C97
         jmp   $43F5      ; decompress and show title
patch
         jsr   $00F0      ; decompress
         jmp   $0800

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