On Fri, 6 Apr 2001, Clint Wolff (VAX collector) wrote:
>
> IIRC, the 34 conductor control cable has (or may have) a twist
> in it similiar to a floppy cable, but incompatible. I had a lot
> of trouble with an ESDI drive that I could get to work. Oddly
> enough, the floppy drives didn't work either :)
The twist better be like that for a hard disk or it will not
work. More and different leads and different side of the cable.
- don
> clint
>
> On Fri, 6 Apr 2001, Richard Erlacher wrote:
>
> > 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 - 23:03:38 BST