>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
+--------------------------------+-------------------------------------+
| Megan Gentry, EMT/B, PP-ASEL | Internet (work): gentry!zk3.dec.com |
| Unix Support Engineering Group | (home): mbg!world.std.com |
| Compaq Computer Corporation | addresses need '_at_' in place of '!' |
| 110 Spitbrook Rd. ZK03-2/T43 | URL:
http://world.std.com/~mbg/ |
| Nashua, NH 03062 | "pdp-11 programmer - some assembler |
| (603) 884 1055 | required." - mbg |
+--------------------------------+-------------------------------------+
Received on Wed Sep 30 1998 - 19:51:18 BST