Date: Wed, 05 May 2004 12:59:19 +1000 From: Darren <[EMAIL PROTECTED]>
Agreed, its amazing what you can do with 20mb, its a shame about the ram in the fx, 1990-1992 was the option for 72 pin far off or did apple have a corner of the 64-pin market? ;)
The 64 pin SIMMs appear to have separate Data-In and Data-Out busses, which is different from normal memory where the Data-In and Data-Out are the same bus. Separate busses for reading and writing (In and Out) could improve performance, and because Apple tried to soup the IIfx up in every way imaginable at the time, that's probably why they used the weird RAM.
It wouldn't be too hard to design and build some larger 64 pin SIMMs if one could find an affordable source for .050" thick printed circuit boards. These days .063" is the standard and so all the specials are on .063". You have to pay regular hurt-me-till-I-charge-it prices for .050" boards.
The other issue would be finding the dual ported RAM chips, but I bet that could be done with some looking around.
Jeff Walther
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