User`s guide

John Link charted some comparisons in 1991 involving nine setups: no-TWGS,
and 7, 8, 9, 10mHz boards before and after the 8kB-to-32kB cache upgrade. He
used three benchmarks:
1. time to calculate page breaks in a 218-page Appleworks document
2. time to scroll through a 39-page Awks-GS document
3. time to compile 4800 lines of MD-BASIC source code
For a 7mHz 8kB TWGS, the speed gain for the 32kB cache upgrade is roughly 33% to
nearly x2.5 plain GS speed.
For a 10mHz 8kB TWGS, the speed gain for the 32kB cache upgrade is roughly 33%
to about x3.25 plain GS speed.
His charts shows that a 7mHz TWGS with the 32kB cache performs slightly
better than a 10mHz TWGS with 8kB cache on tests 1 and 3; it is a bit slower on
test 2.
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022- How can I upgrade my TWGS to 32k cache?
SHH Systeme ( http://www.wbwip.com/shh/ ), a German company, sells the
cache upgrade piggyback board in various states of 'do-it-yourself' readiness.
The ready-to-go version is $69 (+ $14 S&H). It includes three 32K cache RAMs
(62256-15 or equivalent) and can support speed upgrades to 14MHz or better.
SHH does not automatically include the firmware ROM. If your firmware
version is not v1.7 or v1.8, you will also need to order the v1.8 EPROM which
SHH sells for $12.
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From: Scott G., Andrew Roughan, Rubywand
023- How can I upgrade TWGS speed?
The process is very similar to that described earlier for the ZipGS. That
is, you swap in a new 14MHz 65C816, a higher speed oscillator module, and,
possibly, faster 32k x 8 SRAM chips. As mentioned in Q&A 020, you should not
have to upgrade to faster GAL chips. Users with the newer GAL 3E in place may
actually need to swap in an older GAL 3A.
According to a 1992 Appleworks Forum article by John Link, you can get to
12.5MHz with an older 10MHz 65C816, a 50MHz oscillator, and 35ns SRAM without
upgrading to the faster GAL chips.
As with ZipGS, TransWarpGS speed = Osc Speed divided by 4. One difference
is that the TransWarpGS oscillator module is of the "half-size" kind. Another is
that, if RAM is upgraded, the usual practice is for all three to have the same
speed rating. If you do the SHH cache upgrade, there should be no need to worry
about replacing SRAM.