Great news Mike, Thomas Lai took a look at the disks and fixed them easily. According to Thomas : "The fix is simple: change the byte (Track$19, Sector$0A, Address$17) from $E7 to $F7. The problem is caused by all of the emulator is not implement rotating disk model (real floppy drive read different data when the time between successive read is different)." I'll email the working disk images to you shortly, and I'll also upload them to Asimov. Phew, after years of searching the saga is over - we now have working Sunraycer disks. Thanks Thomas and Mike - without you guys this could not have happened. All the best, Mike "Moose" O'Malley ____________________________________________________ Moose's Software Valley - Established July, 1996. WEB: http://move.to/moose ____________________________________________________