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

[Wayne Stewart <waynes@intergate.bc.ca>]

Louis Cornelio wrote:

> what did you have to do to the ZipGS?
> I had mine at 10 mhz no prob, tried a 48 TTL, no luck - put in the
> faster WDC cpu - but it still wouldnt boot w/ the 48! :(

I did the cache mod where I cut out the center of the SRAM sockets and
installed another row of pins so I could use narrow SRAM and installed
15ns SRAM.
I replaced the 74F00 chip with a 74HC00.  I topped out at about 12mhz
before I did this mod
Then started trying faster oscillators. I got up to 15mhz, 16 usually crashes
during booting or shortly thereafter.
I'm still using the original 8mhz 65816. I tried a 14mhz 65816 but it didn't
do anything for me and when I pulled it to try in someones accelerator that
was misbehaving I never put it back.

    Wayne