Re: Zip Chip

[tdiaz@coyote.csusm.edu (Tony Diaz)]

David Empson (dempson@atlantis.actrix.gen.nz) wrote:

> One point to note about IIe accelerators: none of them support Direct
> Memory Access, so you must disable DMA if you have an Apple High-Speed
> SCSI card or a RamFAST SCSI card.  This will slow down disk accesses,
> but the increase in processor speed is probably more significant.

...I wouldn't be so sure. The TransWarp II supports DMA in a //e. Not this
is any great news. Finding a TransWarp II is not an easy thing to do.

Also, had Zip actually continued with their original product plans you would
have had both, "Zip GS" and "Zip GSX". The Zip GS was a PCB that replaced just
the '816 only and was about the size of a business card. No cache, no DMA, 
all soldered. They came to reason that DMA compatibility was the way to go
as things like the RAMFast SCSI card were becomming quite popular.

--
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