Re: CPU question

[supertimer@aol.com (Supertimer)]

"Ronin Hyde" <ronin@inna.shove.your.spam.up.your.net> wrote:

>   After looking at two IIGS motherboards, I noticed one was rev A and the
>other is a rev D. Only other things I could notice was faster memory (12ns
>instead of 15) and a G65SC816P-3 in the A and one with a -4 in the D.
>   Since I'm going to try to snag some other GS's for parts and try creating
>a Frankensystem. Are there any pages on hardware modifications that can be
>done to the motherboard (socketing chips, faster memory, etc) or has anyone
>tinkered with it?
>   Thanks for the time.

No speed difference despite the faster processor.

Rev. A is the initial ROM 00 unit, which can be upgraded to the ROM 01
with two chip swaps.  Rev. D is a ROM 3 unit.  ROM 3 has 1.125MB of
memory on the motherboard while ROM 00 and 01 have 256k on the
motherboard.  Both units can support up to 8MB of memory with current
memory cards.