Re: Zip GS questions

[Barry Rees <Barry.Rees@prodigy.net>]

pubpc1@library.ucla.edu wrote:
> 

> Have you tried to keep it at 16MHz, but changing the DIP config to read
> 16K of cache?  This tends to stabilize things and result in surprisingly
> little degradation in performance.  Keep us apprised of the progress!
> 
> :)
> 
> -Scott G.

Scott,

No, I hadn't tried that. Actually, my initial testing was at 16/64. That
setup was almost unusable. However, I did cut the cache back to 32k and
that proved to be 99% stable. But as I mentioned, I was still getting
random crashes. It's an interesting point that you have brought up about
cutting back on the cache. There was a drastic improvement going from 64
to 32k during my testing. The 16/32 was almost ......... there. Also,
another problem I have is not having any oscillators between 50MHz and
64MHz. So, I can't do any board testing anywhere between 12.5 and 16
MHz.

When I get back to testing, I'll keep in mind the 16k cache that you
suggested. I'd like to get the 16 MHz setup working because it was
INCREDIBLY fast. Question: With the (32k x 8) chips installed, can I
still configure the DIP switches to only use 16k of the 64k installed
cache?

Thanks,

Barry Rees