Re: SRAM on ZipGSX - how fast for 14MHz?

[Roy Miller <millers@inebraska.com>]

Wayne Stewart wrote:

> Roy Miller wrote:
>
> > Faster SRAM.
> > 74HC00???
> >
> > I'll have to ask the fellow who did the work for me. Perhaps that's something we both
> > over looked.
> >
> > Roy
>
> You can check the card easily enough. The SRAM are the 4 chips directly over the
> slot. They should likely have a -X number on them. Handy to know if the chips are
> narrow or wide too.

All four are narrow.
20 nanosecond (I can't remember if the TAGG was 15 or 20, I do seem to remember that we
had to deal with an issue of differing speeds, and right now I don't feel like opening up
the IIgs, I'll try on Monday.)

>
>
> Just to the right of the ribbon cable are two chips. The right one should be either  a
> 74F00 or preferably a 74HC00
>
> If you're topping out at 10mhz I'd tend to guess that your SRAM is too slow

I would think 20 nanosecond SRAM would be fast enough. Perhaps its the 74HC00.

Roy

>
>
>     Wayne