The attract mode with the scrolling text appears fine and the sound works perfectly. Even the wave select screen looks normal. Unfortunately TIE fighters/fireballs/starfield objects are FUBARed. During the TIE fighter sequence all the ships and fireballs appear at 0,0 (which makes it stupidly easy to kill them). They blink in and out of view at seemingly random angles and sizes. The starfield also pops in and out. During the trench sequence everything is squished into the middle of the X axis and it is apparently impossible to hit the exhaust port. I ran the self test hoping it would give me a hint but it couldn't find any mathbox or matrix errors. Even the scaling tests were perfect.