#: 4948 S10/Tandy CoCo
    07-Jul-90  04:16:35
Sb: #4947-#SCSI drives
Fm: Kevin Darling (UG Pres) 76703,4227
To: Bob van der Poel 76510,2203 (X)

Righto... you'd need a scsi controller with it's own floppy drive 'adapter'
section, to use regular floppy drives. Perhaps embedded-scsi floppies will
become popular one day. Never know.

There's an extension to scsi which allows selecting up to 256 devices, but no
one uses it that i know about. Right now, the 8-bit data bus is used to
indicate who's talking to whom (each bit is the flag for one device)... which
is where the limitation comes from. [The data bus bits are used this way only
during the initial phase of making communication each time controllers wish to
talk to each other... otherwise they're data bits].

Yah, that dealer you talked to was selling scsi systems, but not really scsi
drives, in the way most people mean now.

Sidenote: os9 descriptor info doesn't mean much with embedded scsi drives...
because the drives themselves know how many heads/cylinders they have .
Basically, you need only tell an embedded drive to format itself, read or
write. It figures out the internal stuff itself, of course.

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