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Re: Can't go faster than 10MHZ on my IIGS
- Subject: Re: Can't go faster than 10MHZ on my IIGS
- From: Wayne Stewart <waynes@intergate.bc.ca>
- Date: Sun, 19 Aug 2001 13:01:24 -0700
- Newsgroups: comp.sys.apple2
- Organization: Posted via Supernews, http://www.supernews.com
- References: <5WTf7.45$xi.30563@news7.onvoy.net>
- Xref: archiver1.google.com comp.sys.apple2:12462
Dana Eckel wrote:
> Ok,
> I have a Zip GS 1.02 with 32MHZ crystal, upgraded to 64K of Cache. My
> IIGS is a Rom 1 unit. I have tried 40 MHZ, 50MHZ, and 64MHZ crystals with no
> success. Could my ram cache be bad? How do I know it is even seeing the 64K.
> I used skinny chips that are offed from Jameco and the adaptor from
> Digi-Key. And yes I also have a WDC-14 chip installed too.
>
> Thanks for any help you could offer.
Most ZipGSs need the 74F00 replaced with a 74HC00 to get over about 12mhz.
If you have the dip switches set for 64k then it won't run on less than that..
If you
want some sort of software confirmation then try running ZipGS.Sys16 or install
the
ZipDA CDA