Date: Wed, 05 May 2004 21:57:03 -0400 From: Terry Mathews <[EMAIL PROTECTED]>
Jeff Walther wrote:
The other issue would be finding the dual ported RAM chips, but I bet that could be done with some looking around.
SGRAM is dual-ported.
Terry Mathews
The S in SGRAM stands for Synchronous, which means that SGRAM is triggered off of a clock signal. Memory in older machines, which means everything before the Beige G3, is asynchronous which means that the data comes out or goes in based on some relationship to the address and various Enable signals with no clock.
In other words, one can't use Synchronous RAM chips in the IIfx without going through the kinds of gyrations that would amount to building a new motherboard for the IIfx.
There may be dual ported asynchronous graphics chips around that could be adapted, but any parts of that type are most likely not being manufactured any more.
Jeff Walther
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