23.004 What kind of SCSI interface card do I need?
Description
This article is from the Apple II Csa2 FAQ, by Jeff Hurlburt with numerous contributions by others.
23.004 What kind of SCSI interface card do I need?
There are three 'popular' options: The Apple Revision C, The Apple Hi-
Speed, and the RamFAST. The Revision C is older and a bit slower because it
does not utilize direct memory access (DMA), a feature that the Hi-Speed and
RamFAST have. The Apple cards are no longer made or supported; but, you may be
able to buy one at a swap meet.
The Sequential Systems RamFAST has DMA plus an on-board cache of either
256kB or 1MB, making it the fastest interface available. RamFAST has a full set
of utilities in ROM, so, it's easy to set up, too.
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By: Willie Yeo
Apple Hi-Speed SCSI card users need to remember that these cards normally
do not supply termination power. (RamFAST does; but, not the Apple Hi- Speed
SCSI card.) To work properly with the GS, a Zip drive connected to the Apple
Hi-Speed SCSI card requires either another device that can supply termination
power, or requires a hardware hack on the Apple Hi-Speed SCSI card to provide
the termination power.
Note: The Apple Hi-Speed SCSI card termination power modification is detailed
in the Hard Drive and SCSI FAQs (file Csa2HDNSCSI.txt).
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