; WUDSN IDE example ATASM source file ; Supports hyperlink navigation includes. .include "..\Macros.inc" * = $2000 ;Start of code .opt ILL ;Enable use of illegal opcodes .if as start sei ;Run address loop lda $d40b ;Load VCOUNT anc #12 ;Illegal opcode sta $d40a sta $d01a ;Change background color jmp loop1 * = $2e0 ;Set run address .word start