[Coco] Questions about the Coco3 GIME Timer

[Robert Gault]

Gene Heskett wrote:

>>><snip>
>>
>>Two speeds, either 279.4 nsec (1/8 crystal speed = color burst) or 63
>>usec. The service manual is incorrect claiming 70 nsec for the fast
>>speed.
> 
> 
> Even at 63 usec's, that's a wee bit too fast to use for generating 
> interrupts that in turn would count down according the the programmed 
> stepper speed and finally issue the step change.
> 
> 

Well that's the clock rate at slow speed, which is what you asked to 
have. Since the timer is 12-bit, you can set the interrupt at slow speed 
for anything from 63 usec to 0.26 sec (4096x63).