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

!cpu 6502
!to "build/PRELAUNCH/TWERPS",plain
*=$106

         !source "src/prelaunch/common.a"

         +GET_MACHINE_STATUS
         and   #CHEATS_ENABLED
         sta   patch+1
         ldx   #(end_patch-patch-1) ; copy patch code to zero page (stack will be destroyed by the time we need to patch)
-        lda   patch,x
         sta   <($100-end_patch+patch),x
         dex
         bpl   -
         lda   #($100-end_patch+patch)
         sta   $1DF6
         lda   #$00
         sta   $1DF7
         jmp   $1D97      ; decompress and show title
patch
         lda   #0         ; SMC
         beq   +
                          ; lives in $14FE
         lda   #$AD
         sta   $0640      ; patch - don't decrease lives
         sta   $0774      ; patch - don't decrease lives
         sta   $0F05      ; patch - don't decrease lives
+
         jmp   $0400
end_patch

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