Re: ZipGS vs TransWarp? (REQ: techie help)

[pubpc1@library.ucla.edu]

lkhaider@concentric.net (Laer Haider) wrote:
in response to my reply:
>>Why upgrade the ROM at all?
>>
>>I read the articles in the NAUG newsletter about upgrading the TWGS
>>years ago and I remember that the ROM and GAL upgrades were only
>>needed if you were using the old engineering grade chips.  When the
>>real 14MHz CPUs appeared, the author updated the article and said
>>that for up to 10MHz speeds, the original parts were all that were
>>needed if using the 14MHz 65C816 because it was "clearly superior"
>>to the old chips (it didn't need the special delays for some
>>16-bit instructions that were programmed into the upgraded ROMs).
>>
>>I would recommend that the author buy the 32K cache from SHH, get
>>a fast CPU from WDC, and put in a 40MHz oscillator and be happy with
>>10MHz operation.  A 10MHz TWGS performs at the level of a 12MHz
>>ZipGS according to the NAUG tests.
>>
>>-Scott G.
>
>I have a TWGS revision 1.5u (or w, I can't tell with my fuzzy Apple
>monitor) and would like to upgrade it to a faster processor.  Can
>someone point me to a "How To" source and a source for the required
>components?  You mention some of the components needed in the above
>post, but I need more info.

You can get the 14MHz part from Alltech Electronics.
http://www.allelec.com/ (but the site seems be down last week)
Their phone number is (619)724-2404.

You can get a faster oscillator from JDR Microdevices, which lists
them as part number OSC40 for the 40MHz oscillator.  Their phone
number is (800)538-5000

Total cost for processor speedup is $20 (minus S/H).

I can't recall SHH Systeme's web site.  They sell the 32K cache
upgrade.  I don't recall the price either.  Can someone point
the way?  (I do know that they're the ones that started the
"upgrade needs greater than 1.5 ROMs" rumor, which is incorrect).

-Scott G.