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

[lkhaider@concentric.net (Laer Haider)]

>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.