> On 2018-03-20, at 18:46, Jim Brain <brain@jbrain.com> wrote: > >> How do/did you test the PLA you made? > > THe 6509 item, or the C64 PLA? The C64 PLA. That's what I have. > In general, if I have a working unit, I run the two systems in parallel, watching the signals for any differences. So it is more like trial and error? I thought it was more like measured before and at least coarse-designed to have the same timing. > Synthetic tools are great to test in general, but Commodore always played fast and loose with the timing. That's why we so often need to put efforts into conscious making it behave as it happened to behave for them by chance, right? ;-) -- SD! - http://e4aws.silverdr.com/Received on 2018-03-20 20:00:02
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