Hi Lem On Friday 10 September 2004 10:22 pm, Lem wrote: > I've found another quirk with UAE (this will apply to all versions). > With the event of CPU frequency scaling, the "calibrating delay loop" > function of UAE will provide inaccurate values. This is something I know about. I need to investigate the best way to solve the problem. On Linux, the simplest solution might be to check whether frequency scaling is enabled and, if so, not use the processor clock for timing. Cheers, Rich