[stella] Understanding the PIA

[André Wagner]

> OK, now I'm just really confused.  There's the documentation that you 
> provided from nocash, and the actual implementation in Stella that say 
> this is how it should work.  However, z26 and MESS don't do it that 
> way, and they produce the results that you guys say is correct.
> 
> At this point it's not a matter of fixing a bug in the emulator; I have 
> code that does it both ways.  What I need is confirmation of *which* 
> way is correct.

Well, I don't know, since I don't have a physical Atari to test. It's just my guess to why someone wrote code that changes the behaviour of TIA when INTIM is read.

André

-- 
André Wagner <andre.nho at gmail.com>
http://historiacomputacao.blogspot.com