Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!bloom-beacon!gatech!hubcap!ncrcae!ncrlnk!uunet!ssbell!mcmi!hdr!unocss!mlewis
From: mlewis@unocss.UUCP (Marcus S. Lewis)
Newsgroups: comp.sys.zenith.z100
Subject: Re: Adapting Vector 4 disk board to Z-100
Keywords: Adding disk drives to MS-DOS
Message-ID: <674@unocss.UUCP>
Date: 17 Feb 89 14:33:10 GMT
References: <765@deimos.cis.ksu.edu>
Distribution: usa
Organization: U. of Nebraska at Omaha
Lines: 21

OK, let me give it a try.  You have (upto) three operating systems you want
to use the Vector board with, CP/M-85, CP/M-86, and MS-DOS, right?
If you run it in MS-DOS 2 or 3, a device driver is probably the simplest
way to do it, which only prevents you from booting off the board.
BYTE mag had an article about three years ago about adding a 96 TPI drive
to an MS-DOS system, and REMark and Sextant have had discussions on this as
well. 

CP/M is going to require you to hack the BIOS.  You will have to read the sources
VERY carefully, and basically mimic the data structures used by the Z-207
when you write the code.  The source file of greatest interest is going to be
something like DEFZ207.ASM or .INC. I assume you have a complete manual for the
Vector board.  Do you have the BIOS sources for it as well?
If I am not mistaken, the disk code for both CP/M 86/86 runs on the 8088, and
the code assembles under CPM-86.  You need to add the data structures and 
controlling code to the BIOS86 and the drive tables to the BIOS85.

Come, somebody else give this a shot!  He had to cross post to comp.misc to
get help out of me, and I have never had the time to hack on my Z.

Marc Lewis