If SimCoupe uses rdtsc without setting the CPU thread affinity, there are 
issues on some systems where it loses track when the thread is scheduled onto 
another CPU core. Usually a bios update can fix this, or switching to use 
QueryPerformanceCounter. 

-----Original Message-----
From: Simon Owen
Sent: Monday, April 04, 2011 7:37
To: [email protected]
Subject: Re: Introduction and E-Tracker Query

On 3 Apr 2011, at 23:26, Andrew Gillen wrote:
> All development and composing has been on Sim Coupe so far. The guy doing the 
> music has redone the module from scratch, and made it a lot longer. This time 
> round most of it plays fine until about 40 seconds in when some of the 
> channels come in at the wrong time and are all messed up.

If you suspect that there could be a SimCoupe issue, please do send it my way.  
I'd be surprised if a CPU core issue would have gone unnoticed for so long, 
though it could still be some other time-sensitive aspect of the consistency of 
the emulation – such as input updates being applied at the same point in each 
frame.

Si



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