I have a 469 with consistent VPS errors. Changing the mux chips fixes it as does using SRAM. It's my VSP testing machine so I have saved the original mux chips for testing purposes. -Pasi On Thu, 3 Jun 2021 at 15:12, Nejat Dilek <imruon_at_gmail.com> wrote: > > Maybe it's the humidity which changes seasonally... Testing the same hardware & software at the same time with inverse climatic conditions may help, > > Nejat > > On Thu, Jun 3, 2021 at 12:32 PM <silverdr_at_wfmh.org.pl> wrote: >> >> >> >> > On 2021-06-02, at 19:42, smf <smf_at_null.net> wrote: >> > >> > "Finally, this phenomenon hinges on the exact timing of the RAS signal at the nanosecond level, and on many machines the critical situation simply doesn't occur. The timing (and thus the probability of a crash) depends on factors such as temperature, VIC revision, parasitic capacitance and resistance of the traces on the motherboard, power supply ripple and interference with other parts of the machine such as the phase of the colour carrier with respect to the dotclock. The latter is assigned randomly at power-on, by the way, which could be the reason why a power-cycle sometimes helps. >> > >> > [...]" >> > >> > I'm not sure there is any easy way to tell. >> >> Yeah - still no luck here despite even dropping some Rs/Cs here or there. >> >> -- >> SD! >> >> >> >>Received on 2021-06-03 15:01:29
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