ESDI Cabling - test-drb@ccmp.vtda.org

30 Sep 1998

...
 The only PC ESDI controllers I have ever found all have
2 data cable
connectors (20 pin on the card), which can each connect to one drive
only, same as MFM. In fact right now I can't think of any differences
between ESDI and MFM cabling for PC's. Not sure about the twist details
though. 
I have one of the Andromeda ESDC controllers for qbus pdp-11s, and it
has four connectors on it.  One wide one (like the wide MFM one) and
three of the narrow ones.  According to the documentation I have, one
could attach up to three drives to the one controller, possibly up
to six with some sort of adapter...  (It also support floppies with
an adapter, but I don't have that)

					Megan Gentry
					Former RT-11 Developer

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