Re: It's ROM 1.02; more symptoms; can anyone comment?

You can salvage a lot from your existing cable. Need is a new female
40 pin header. Just crimp it on to the ribbon cable, a bit closer to
the 40pin DIP that goes into your 65c816 socket and cut the old one
off.

If you're looking for speed, you need to also replace the 74Fxx chips
with 74HCTxx chips.

The oscillator needs to be a CMOS type (like the ones on a TWGS), not a
TTL can type. When you desolder the old xtal, solder in a machine pin
socket that you can sweeze a small zip tie underneath so you can lock
your new xtal into place once you find one that works.

- Paul


mmmann wrote:
> > Maybe it's time to look at the cable.
>
> Wow. That would never occur to me. That short cable between the board and
> the CPU socket? It's about an inch long and seems innocent enough. Where
> would I purchase a better cable or the parts to replicate the cable with
> better materials?
>
> More information: The IIgs was crashing a lot with 12ns tag and 20ns RAM.
> I'm now running fairly stably with the 20ns 32x8s in tag and the 70ns 32x8s
> in data...albeit only at 8Mhz.
>
> I'm not ready to give up yet. I'd like 10Mhz or more. If anyone else has
> recommendations, I'm all ears.
>
> Mike

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