Design flaw in the SCSI spec?

Chuck Guzis cclist at
Wed Jan 8 12:45:29 CST 2020

On 1/8/20 10:32 AM, Peter Corlett via cctalk wrote:
> On Wed, Jan 08, 2020 at 10:17:29AM -0800, Chuck Guzis via cctalk wrote:
>> Before I go delving into my pile of SCSI X3T10 documentation and interface
>> chip datasheets, exactly *which* flavor of SCSI are we talking about here?
> Given the reference to the Amiga, almost certainly SCSI-1, i.e. 8 bit wide
> single-ended HVD, clocked asynchronously at low single-digit MHz.
> The A2091 (and thus presumably the A590) was a pretty hateful controller, but
> the main sources of pain were its shoddy firmware and the limited Zorro-II bus
> rather than the SCSI interface. Perhaps the third-party GVP controllers swapped
> it around so the firmware was great but the SCSI side sucked.

SCSI-1 was pretty chancy to begin, but even SCSI-2 had a bit of voodoo
associated with it.


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