> I've never seen a PC type (non PS-2) type external drive from IBM but
> they were probably available.
Not from IBM.
After the PC was released, IBM couldn't see any reason why anyone would
want more than two drives. So, they "fixed" that on the AT, by only
providing for two drives, at the same time that they began supporting two
different kinds of drives. Soon 3. Soon 4. So, the PC, with only one
kind of drive available, had hardware support for 4 drives. Soon
thereafter, with need for three different kinds of drives, IBM had
hardware support for only two drives. (It is not necessary to have both
720K AND 1.4M on the same machine (other than for copying), but 1.2M could
NOT completely subsume the need for 360K (if you interchanged with
others)). Aftermarket disk controller cards remained available that would
support 4 drives.
--
Fred Cisin cisin_at_xenosoft.com
XenoSoft http://www.xenosoft.com
2210 Sixth St. (510) 644-9366
Berkeley, CA 94710-2219
Received on Mon Apr 05 1999 - 16:49:12 BST