6 May
2002
6 May
'02
1:53 a.m.
From: Megan <mbg(a)TheWorld.com>
To: classiccmp(a)classiccmp.org <classiccmp(a)classiccmp.org>
Date: Monday, May 06, 2002 9:14 AM
Subject: Re: free DEC M7555 card
Further edification on the subject.
RQDXn is MSCP host controller with MFM hard disk interface
as well as a floppy interface for RX50 or RX33.
EDSI is a disk interface.
Allison
This is a RQDX3 ESDI hard disk controller.
RQDXn is not ESDI at all.. it is MSCP. 
6 May
6 May
2:19 a.m.
On Mon, 6 May 2002, Allison wrote:
RQDXn is MSCP host controller with MFM hard disk
interface
as well as a floppy interface for RX50 or RX33.
EDSI is a disk interface.
I've been wondering, based on some old posts to the CP/M groups. Will
the same disk, for example an ST251, format and work off either an MFM
or an ESDI controller? Totally true, totally false, depends on drive?
For that mmatter, is there a good newbie-level reference for the 2
interfaces? They were history when I started playing with keyboards,
and I never dreamed I'd need to know.
Enquiring minds keep asking.
Doc
9:54 a.m.
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