RE: fastest GS accelerator?

[pho@vmsa.oac.uci.edu]

* Posted for my cousin Long Hoang. *

derek@slab.slip.uiuc.edu (Derek Taubert) writes:

> Pardon me for not believing you, but the 74F00 has propagation and edge
> rise times that are at least twice as fast as the 74HC00 part (HC -
> High-speed CMOS).  CMOS is fairly slow, HC means that you're running a
> little bit faster than TTL LS parts.  You would be better off with the F
> chip, unless the reason has to do with something other than speed.  Care
> to explain it?

True, F (Fast Schottky) is much faster than HC (High Speed CMOS).  I never
claimed it wasn't.  The F series is commonly used on high speed 486DX-50
or 486DX2-66 motherboards.  Using the F series for the Zip GSX running
around 15 MHz is overkill.  HC is fast enough plus it handles noise better
than F (look in your HC data book and read what it says about noise).  The
biggest thing that's preventing the Zip GSX from running fast is NOISE.
In selecting parts for Zip GSX it's more important to look for low power/low
noise then speed.