 processor 6502
 
 org $a000-2	; so we can write the ...
 .word $a000	; cartridge 2-byte header
 .word Start	; start vector
 .word Start	; RESTORE vector
 .byte $41, $30, $c3, $c2, $cd ; "A0CBM"
  
Start:
 lda $9004
WaitLine;
 cmp $9004
 beq WaitLine
 sta $900f
 jmp Start
 
