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Re: 8MHz Zip Chip doesn't work?



mdj wrote:
rg.jones@rogers.com wrote:

Last year I picked up a nice IIc package deal. Included was a 8Mhz zip
chip. At the time the guy ran the diags for me and they checked out
okay. We really didn't run anything to demo the speed so I didn't think
much of it.

I was running Contiki today testing some stuff and at one point both
the IIc and my IIgs (with a stock transwarp-gs) had the screen saver
come on. I immediatly noticed a big difference in that the IIc was a
lot slower.


It's fairly understandable that a stock transwarp gs would
significantly outperform a zipchip. While the clock speeds are similar,
the caching arrangement on the transwarp is vastly superior.


I search around and found the Zip utilities that came with the system.
The system tests still pass and and software reports that it can turn
the chip on and off. I see no difference at all when it is supposed to
be on or off.


Very, very strange. There should be a lot of noticeable differences
with the Zip enabled, from higher-pitched noises to games running
stupidly fast.

Most failures in a Zip Chip would render it either non-working or
unreliable, but not slow.

Of course, such a failure is possible, but unusual.

Normally, to boot it slow, you have to hold Escape while resetting.

-michael

Parallel computing for 8-bit Apple II's!
Home page:  http://members.aol.com/MJMahon/

"The wastebasket is our most important design
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