4cade/src/demo/burgertime.a

;license:MIT
;(c) 2021 by Frank M.

!cpu 6502
!to "res/DEMO/BU",plain
*=$300

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

         +ENABLE_ACCEL
         +LOAD_XSINGLE title

         lda   #$60
         sta   $3ec9
         sta   $3f09
         jsr   $3e97      ; decompress

         +DISABLE_ACCEL

         lda   #$4C
         sta   $653F
         lda   #$8D
         sta   $653F+1
         lda   #$65
         sta   $653F+2    ; skip joystick/keyboard selection

         lda   #$b1
         sta   $646b
         jsr   $6400

         +ENABLE_ACCEL

         jsr   $811

         lda   #0
         sta   $A30A
         lda   #1
         sta   $A30F      ; reset vector patch

         lda   #$4C
         sta   $9FD3
         sta   $9FCF
         sta   $A497      ; set exits

         lda   #0
         sta   $9FD3+1
         sta   $9FCF+1
         sta   $A497+1
         sta   $A15B
         sta   $A16A
         sta   $A17B
         sta   $A1D0      ; disable sound

         lda   #1
         sta   $9FD3+2
         sta   $9FCF+2
         sta   $A497+2

         +DISABLE_ACCEL

         jmp   $a300

title    !byte x_e-x_b
x_b      !text "BU"
x_e

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