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From: bartling@dvorak.amd.com (Steve Bartling)
Newsgroups: comp.sys.ibm.pc.hardware
Subject: Installing EDSI and MFM drives in the same system
Message-ID: <1990Dec10.152501.12543@mozart.amd.com>
Date: 10 Dec 90 15:25:01 GMT
Sender: usenet@mozart.amd.com (Usenet News)
Organization: Advanced Micro Devices; Austin, TX
Lines: 47

Hello, 

This probably falls in the category of 'frequently asked questions'
so I am probably going to waste some net bandwidth.

That having been said, here is my question :

How do you install ESDI and MFM drives in the same system ?

I currently own a Western Digital ESDI Dual HD/FD controller
( WD1007A-WA2) and a seagate ST2106E 90 MB ESDI drive 
( equivalent to the CDC Wren III 1/2 height 90 MB ESDI drive ).

I also own a seagate ST4096 80 MB MFM hard disk and a no-name
( MORSE ) Dual HD/FD 1:1 MFM controller.

I would like for these to peacefully coexist in the same system.

My current level of understanding is that I will need to replace
the MORSE controller with a 1:1 MFM HD controller that has the
following features :

1) Relocateable I/O address
2) Selectable IRQ ( IRQ 14 or IRQ 15 )

Are there any other required features ? 

Does anyone have a recommendation for a 1:1 MFM HD controller
that meets the above requirements ?

I have a second question relating to my BIOS :

I have a recent vintage PHOENIX BIOS that I am using on a 386
20 MHZ clone motherboard ( VIP ). Will this bios recognize and
take advantage of a secondary disk drive with a relocated I/O
address ?

How do I get DOS to recognize and use the secondary drive ?

Thanks for your help,

Steve Bartling

email : bartling@dvorak.amd.com

P.S. please reply by email, I don't always have time to read 
     this newsgroup regularly.