;license:MIT
;(c) 2021-2022 by Frank M., qkumba

!cpu 6502
!to "build/DEMO/SPACE.EGGS",plain
*=$300

         !source "src/constants.a"   ; no code in these
         !source "src/macros.a"

         +GAME_REQUIRES_JOYSTICK
         +ENABLE_ACCEL_LC
         +LOAD_XSINGLE title

         +NEW_RESET_VECTOR $280

         lda   #$60
         sta   $2056
         jsr   $2000      ; decompress

         ldx   #6-1
         lda   #$EA
-        sta   $4821,x    ; avoid clobbering stack
         dex
         bpl   -

         ldx   #3-1
-        lda   patch2,x
         sta   $4B00,x    ; change button press detection to keypress detection
         lda   patch3,x
         sta   $4B06,x    ; exit on keypress
         dex
         bpl   -

         ldx   #11-1
-        lda   patch, x
         sta   $4BD6, x
         dex
         bpl   -          ; decrement custom counter after demo cycle and eventually exit

         lda   #$02
         sta   $4BFF      ; initialize custom counter

         +DISABLE_ACCEL

         jmp   $4880

patch    !byte $CE,$FF,$4B,$10,$03
patch3   !byte $4C,$00,$01,$4C,$B0,$4B
patch2   !byte $AD,$00,$C0

title    !byte x_e-x_b
x_b      !text "SPACE.EGGS"
x_e

!if * > $3F0 {
  !error "code is too large, ends at ", *
}