[Coco] CoCo's TIMER and 60hz

Mark McDougall msmcdoug at iinet.net.au
Thu May 30 09:21:57 EDT 2019

On 30/05/2019 3:14 am, Bill Nobel wrote:

> The Coco3 was never accurate on software time due to fact the IRQ
> line is shared with other devices besides VSYNC.  Yes they are queued
> but arn’t serviced accurately based on time.

I don't see how shared interrupts can contribute at all to drift? That 
would only occur if a countdown timer was only reset when the interrupt 
is actually serviced which, to my knowledge, can't be the case with the 


Mark McDougall

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