[no subject]

The TAG RAM speed might be a different ratio with a constant offset,
e.g. (3/F - 30 ns).  This means that you would need 16 ns TAG RAM at
16 MHz, for example, but still only need 63 ns at 8 MHz.

One final issue to consider: REMcorp could be testing and hand-picking
RAMs that actually run a little faster than their printed speeds, so
your "65 ns" RAM might be 61 ns, for example.

> The FAQ also indicated that one of the interface chips needed
> replacement for higher clock speeds.  I bought the new chip, but,
> strangely, it has a slower response characteristic, according its
> specs, than the version that is already installed.

Yes, that is right.  I think the issue is more related to the power
consumption, voltage levels or driving/loading characteristics, rather
than the speed.  (The 74F00 part is significantly faster than would be
needed on the fastest possible ZIP GS, and the 74HC00 is fast enough.)

-- 
David Empson
dempson@actrix.gen.nz
Snail mail: P.O. Box 27-103, Wellington, New Zealand