> On 2021-01-08, at 19:21, Segher Boessenkool <segher_at_kernel.crashing.org> wrote: > >> If we exclude on-chip propagation times then there has to be something else that "matters" because with the same external timing, still only (some) HMOS-II chips expose the problem. > > I have seen no proof of that claim, btw -- of course it is hard to show > supporting evidence for a negative claim, it will need a lot of > independent observations. In my first post on the subject I mentioned that I did a lot of tests with many different combinations of chips and boards, including the RMK2, which handles both HMOS-II and NMOS VICs. Obviously it's still not a full proof but a) I never heard of anyone experiencing the problem with NMOS VIC. b) our extensive tests of running a few dozen of VIC chips in eleven variants, including the NMOS Drean one fully confirm that, including running them on a board with the same timing (the RMK2). -- SD!Received on 2021-01-08 23:00:03
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