User`s guide

Reversing these changes is fairly easy. If you decide that the performance
change was detrimental, simply desolder the wires that you installed, and solder
in wires to replace the traces that were cut.
I found that the split cache sped up my system notably, especially under
the Finder and other desktop applications. Improvement was much less noticeable
under text applications. (I haven't checked affect on compiling speed, yet.)
______________________________
From: Rubywand
I tried the split-cache mod on my 10MHz/64kB ZipGSx. Before/after timings
were done for several tasks including Scrolls through Finder windows, Scrolls
and Find/Replace through Coolwriter (super-res) and Appleworks (plain text)
documents, and Platinum Paint fills.
Timing differences were very small-- usually within the error normally
experienced when clicking a stopwatch for repetitions of identical events. Where
a difference was observable, it favored the unified 64kB cache.
Evidently, at least on a 64kB board, the ZipGS does a fairly good job of
managing the unified cache. Possibly, the mod comes out ahead in some tasks not
sampled; or, it may work better on 16kB boards.
____________________________
From: Richard Der
013- I have a 7MHz ZipGS. How fast can the board be
pushed without getting new SRAMs or a new CPU? What parts
do I need?
You may be able to get it to run at up to 10MHz by just replacing the
oscillator with a faster one for less than two dollars!
I have a Zip GS that came as a 7/32 and was used at 7MHz for a long time.
The board came with a socketed oscillator, so one day I swapped out the 28MHz
oscillator for a 36MHz one. The computer booted up at 9MHz. When the 36MHz osc
was replaced with a 40MHz osc, the Zip ran at an amazing 10MHz!
Your mileage may vary, though. The GS that this upgraded Zip resides in has
a high output power supply. Still, considering these oscillators cost $1.39
each, it is worth getting three or four and trying an oscillator swap alone
first. If a faster oscillator alone won't do the trick, then a faster CPU and/or
faster cache chips may be necessary.
Good Luck!