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Re: Ultrawarp...
STYNX <stynx@gmx.de> wrote:
> I just read the RamFast (revD) manual again and found a passage i over-read:
>
> "... Other things to be aware of is that the 10mHz RocketChip will not
> work in the same system
> as RamFAST/SCSI. This is a problem with the RocketChip, not the
> RamFAST/SCSI and there is nothing that we can do about it. Also, some of
> the 8mHz ZipChips have problems in the same system as a RamFAST/SCSI. ..."
>
> Seems to have been a Problem back than as well. :-)
> Michael will probably need (a/my) RF to find the problem.
> Since i have only a RF revD, i can not test the revC (which has dip-switches for DMA)
The Zip Chip and RocketChip were functionally identical, and, since the
connect only to the CPU socket, they have no way of knowing about DMA (to
invalidate or eavesdrop for their caches).
A slot card can see DMA activity, and so could cope with it.
-michael - NadaNet 3.1 and AppleCrate II: http://home.comcast.net/~mjmahon