Re: //gs Memory 8 or 16megs?

[david@uow.edu.au (David Wilson)]

"**** ****" <***@***.com> writes:
>David Empson wrote in message
>>The only way to "fix" it would be to replace the FPI or CYA chip (a
>>custom chip made by Apple) with one that used different memory decoding
>>logic, and retained every other feature.

>I've heard of quite a few amazing hardware hacks before, so I wouldn't be so
>quick to deny the possibility. But the surface mount chip kinda kills the
>idea, doesn't it? Shame.

For those of us with out accelerator cards in our //gs computers, a card
could be designed with the CPU and RAM and decode logic and a cable to plug
it into the motherboard CPU socket. The banks $80..$DF could be decoded before
the FPI/CYI even sees the address. This would be made slightly more complex
by the need to refresh the RAM but it would certainly be possible (if not
economically viable as I imagine anyone who would want to do this would also
want a faster clock speed than 2.6MHz - I guess a brand new accellerator
card could be designed with on board RAM...)
--
David Wilson  School of IT & CS, Uni of Wollongong, Australia