info wanted: ST-506, SCSI interfaces (relevant to writing drivers)

[Johannes Sayre]

The following is a fragment of a piece of mail I received from a friend who
doesn't have newsgroup access:

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                              Do you know of any info on st506 and scsi
interfaces that can be obtained??  I have a tape drive (QIC 40 format) that I
wanted to play around with device drivers with.  Of course this is on
the AT controller which the tech ref doesnt specify what kind of interface
it is......  I dont know what the command strings are supposed to be for the
various operations like rewind etc.
---------------------------------------------------------------------------

He's running SCO Xenix on an IBM AT (no clone).

If anyone has any relevant info or can point me at some, I'd appreciate
it a lot.  If you think you might know something, but the fragment above
is unclear, I'll try to get you a more detailed picture of what the guy
wants to know.

Thanks in advance;

please reply BY E-MAIL to:

-- 
Johannes Sayre
Dept. of Computer Science   Internet: sayre at sbcs.sunysb.edu
SUNY Stony Brook            UUCP: {allegra,philabs,pyramid,research}!sbcs!sayre
Stony Brook, NY 11794       CSnet: sayre at suny-sb