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Re: Video Coprocessor


> Whenever the MP gets a chance -- at the end of the current memory
> transaction of the stack processor (SP) -- it fetches the next video word
> and puts it into PR.  In the case it is a jump, MP generates an immediate
> second memory access go get the video word at the new location.  So, the
> PR is sometimes filled with one memory access, sometimes with two. 

Does the video processor have a higher bus priority than the stack
processor?  If not, then that would explain a large number of video
effects, like jitter and spurious black lines and stuff (the old TRS-80s
had this problem).


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