keeping my experiment rolling ;) I just received the "high speed rated" NSC800, supporting 4MHz. Now, I did successfully run the 2.5 MHz rated part at 5MHz, so I will be interested to see if the 4MHz part is really any faster in the M100.
as usual, I will report back. On Fri, Nov 6, 2020 at 10:31 PM Stephen Adolph <[email protected]> wrote: > To continue the exploration on overclock, > > I have assembled a proper clock synthesizer which can generate any clock > from 2.5M to 10M. It uses a 74HC4046 PLL chip, a 10 divider and a 250kHz > to 1MHz source clock. > > > So this will let me finely tweak clock period to try and estimate safe > overclock. > > My approach will be as follows. > > 1. I need a way to measure time-to-failure. To this end I have an IPL > program that measures and displays time. When the program crashes I can > use the last time displayed as data. > > 2. Plotting clock cycle time vs. Failure time should produce a curve that > will allow extrapolation the fastest safe clock rate. I would think > log(failure time) vs linear(cycle time) would be a straight line. > > > > > >
