ESDI Cabling

From: Olminkhof <jolminkh_at_nsw.bigpond.net.au>
Date: Wed Sep 30 18:14:25 1998

>> ESDI cables for PC's may or may not have a twist. The drive has a jumper
>> (usually marked drive 1 or 2) that must be set accordingly.
>
>I was under the impression that ESDI used 3 binary-encoded lines to
>select up to 8 drives on the same cable, and that there was no way just
>by swithing them round to have all the drives set to the same number.
>Certainly the ESDI drive I've just picked up has 3 binary-encoded
>selection links on the logic board. Of course for the special case of
>drive 1 and drive 2 (although not drive 0 and drive 1) you can get away
>with swapping over bits 0 and 1.


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.
Received on Wed Sep 30 1998 - 18:14:25 BST