ESDI uses a 34-conductor control cable, and a 20-conductor data cable, both
similar to what's used on ST506/412.
The only widely used interface I know of that actually uses TWO 50-conductor
cables is the Pertec controller/formatter interface.
Dick
----- Original Message -----
From: "Jeff Hellige" <jhellige_at_earthlink.net>
To: <classiccmp_at_classiccmp.org>
Sent: Friday, April 06, 2001 6:06 PM
Subject: Re: pertec interface
> >This sounds more like ESDI to me. If memory serves that was a two
> >cable system.
> >RLL and MFM were too, now that I think about it, although not 50 pin cables.
> >I'm betting ESDI.
>
> The only true ESDI system, not counting the IBM DBA interface
> used in some of the PS/2 series, that I have here is in my MicroVAX
> II and it had daul Maxtor XT-8380E's installed. Full height 5-1/4"
> drives of 380meg each. I pulled one of them out to replace it with
> the TK50. Anyway, the cables for the drives are the same width as
> MFM/RLL drives: 34 and 20 pins. This is verified by comparing it
> directly to a Tandon TM-502. Wasn't ESDI an outgrowth of the ST-506
> drives/interface?
>
> Jeff
> --
> Collector of Classic Microcomputers and Video Game Systems:
> Home of the TRS-80 Model 2000 FAQ File
> http://www.geocities.com/siliconvalley/lakes/6757
>
>
Received on Fri Apr 06 2001 - 19:21:52 BST