[stella] Understanding the PIA

Stephen Anthony sa666666 at gmail.com
Thu Apr 3 11:52:02 CDT 2008


On Thursday 03 April 2008 14:09, bob.montgomery at thomson.com wrote:

> Based on some other tests I just ran, it looks like, in Stella, once
> the  timer hits $FF it counts at *double speed* (!) until you read INTIM
> again, and then it resumes counting at the correct speed.

OK, I'll look into this later tonight.

> Though my 
> tests were all with TIM1T, I don't know if that holds for TIM8T, TIM64T,
> or TIM1024T.
>
> -Bob

If you get a chance, could you also test those  (ie, let me know what *is* 
happening, and what *should* be happening in terms of output)?

Thanks,
Steve



More information about the Stella mailing list