6 Nov
2001
6 Nov
'01
5:56 a.m.
Standard CP/M on 8" is the right bios but.... The right media
as the MDS controller was SD/D2... single density(normal ibm
128 byte sectors) and D2 was double density by m2fm and
incompatable with everything except Intel. So you need
another working intel box user.
Allison
-----Original Message-----
From: Doug Taylor <techno(a)dsuper.net>
To: classiccmp(a)classiccmp.org <classiccmp(a)classiccmp.org>
Date: Tuesday, November 06, 2001 11:42 AM
Subject: ISIS & CP/M for MDS 225 series3
Hello folks...
I've been trying to get an operating system for my MDS 225 series 3 on 8"
disks.
I've read that it uses ISIS (Intel System Implementation Supervisor)
and that it can also run CP/M (GENERIC) according to Joe's web site
http://www.intellistar.net/~rigdonj/mds.htm
However, I've tried to email joe at
rigdonj(a)intellistar.net
But the mail bounces as undelivered.
Any ideas?
Doug Taylor (Techno)
Sysop of the "Dead On Arrival BBS"
Telnet://doabbs.dynip.com
http://www-mtl.look.ca/~techno
techno(a)dsuper.net
6 Nov
6 Nov
6:54 a.m.
One thing to look for is a Western Digital 1781/83 controller. That's the one
they advertised (I hope they shipped 'em) in their 1982 databook for use with
M^2FM. The fact I've never seen one doesn't suggest you'll have much luck,
but
if you do see one, that's the one that handles that particular modulation.
Dick
----- Original Message -----
From: "Allison" <ajp166(a)bellatlantic.net>
To: <classiccmp(a)classiccmp.org>
Sent: Tuesday, November 06, 2001 9:56 AM
Subject: Re: ISIS & CP/M for MDS 225 series3
Standard CP/M on 8" is the right bios but.... The
right media
as the MDS controller was SD/D2... single density(normal ibm
128 byte sectors) and D2 was double density by m2fm and
incompatable with everything except Intel. So you need
another working intel box user.
Allison
-----Original Message-----
From: Doug Taylor <techno(a)dsuper.net>
To: classiccmp(a)classiccmp.org <classiccmp(a)classiccmp.org>
Date: Tuesday, November 06, 2001 11:42 AM
Subject: ISIS & CP/M for MDS 225 series3
Hello folks...
I've been trying to get an operating system for my MDS 225 series 3 on 8"
disks.
I've read that it uses ISIS (Intel System Implementation Supervisor)
and that it can also run CP/M (GENERIC) according to Joe's web site
http://www.intellistar.net/~rigdonj/mds.htm
However, I've tried to email joe at
rigdonj(a)intellistar.net
But the mail bounces as undelivered.
Any ideas?
Doug Taylor (Techno)
Sysop of the "Dead On Arrival BBS"
Telnet://doabbs.dynip.com
http://www-mtl.look.ca/~techno
techno(a)dsuper.net
2:05 p.m.
On Tue, 6 Nov 2001, Allison wrote:
Standard CP/M on 8" is the right bios but.... The
right media
as the MDS controller was SD/D2... single density(normal ibm
128 byte sectors) and D2 was double density by m2fm and
incompatable with everything except Intel. So you need
another working intel box user.
Allison
I am told that a WD1793 based controller can read M2FM. Have not tried
it myself, though. Did not Altos use such a format with their MP/M
disks?
- don
-----Original Message-----
From: Doug Taylor <techno(a)dsuper.net>
To: classiccmp(a)classiccmp.org <classiccmp(a)classiccmp.org>
Date: Tuesday, November 06, 2001 11:42 AM
Subject: ISIS & CP/M for MDS 225 series3
Hello folks...
I've been trying to get an operating system for my MDS 225 series 3 on 8"
disks.
I've read that it uses ISIS (Intel System Implementation Supervisor)
and that it can also run CP/M (GENERIC) according to Joe's web site
http://www.intellistar.net/~rigdonj/mds.htm
However, I've tried to email joe at
rigdonj(a)intellistar.net
But the mail bounces as undelivered.
Any ideas?
Doug Taylor (Techno)
Sysop of the "Dead On Arrival BBS"
Telnet://doabbs.dynip.com
http://www-mtl.look.ca/~techno
techno(a)dsuper.net
2:22 p.m.
New subject: M2FM (was: ISIS & CP/M for MDS 225 series3
On Tue, 6 Nov 2001, Allison wrote:
> Standard CP/M on 8" is the right bios but.... The right media
> as the MDS controller was SD/D2... single density(normal ibm
> 128 byte sectors) and D2 was double density by m2fm and
> incompatable with everything except Intel. So you need
> another working intel box user.
On Tue, 6 Nov 2001, Don Maslin wrote:
I am told that a WD1793 based controller can read
M2FM. Have not tried
it myself, though. Did not Altos use such a format with their MP/M
disks?
Although they may have had many more unique formats than I'm aware of, I
have seen quite a few Altos MP/M diskettes that were very ordinary 96TPI
MFM, (and readable with a 765)
Does anyone have a good refernce to the internal details of M2FM?
--
Fred Cisin cisin(a)xenosoft.com
XenoSoft http://www.xenosoft.com
PO Box 1236 (510) 558-9366
Berkeley, CA 94701-1236
NOTE: My ISP is having difficulties. If you have problems reaching me at
this e-mail address, you can leave a message at:
cisin(a)info.sims.berkeley.edu
fcisin(a)merritt.edu
2:44 p.m.
New subject: M2FM (was: ISIS & CP/M for MDS 225 series3
Both MFM and M2FM use the same sort of clock/data separation logic, according to
what I've been able to find out. That WD178x series used some sort of
separately advertised/supported clock extraction circuit so I've been unable to
progress beyond that point as far as establishing whether it would also do MFM.
You might check with Eric Smith, as he's got some M2FM stuff to read eventually.
He may have the info.
Dick
----- Original Message -----
From: "Fred Cisin (XenoSoft)" <cisin(a)xenosoft.com>
To: <classiccmp(a)classiccmp.org>
Sent: Tuesday, November 06, 2001 6:22 PM
Subject: M2FM (was: ISIS & CP/M for MDS 225 series3
On Tue, 6 Nov
2001, Allison wrote:
> Standard CP/M on 8" is the right bios but.... The right media
> as the MDS controller was SD/D2... single density(normal ibm
> 128 byte sectors) and D2 was double density by m2fm and
> incompatable with everything except Intel. So you need
> another working intel box user.
On Tue, 6 Nov 2001, Don Maslin wrote:
I am told that a WD1793 based controller can read
M2FM. Have not tried
it myself, though. Did not Altos use such a format with their MP/M
disks?
Although they may have had many more unique formats than I'm aware of, I
have seen quite a few Altos MP/M diskettes that were very ordinary 96TPI
MFM, (and readable with a 765)
Does anyone have a good refernce to the internal details of M2FM?
--
Fred Cisin cisin(a)xenosoft.com
XenoSoft http://www.xenosoft.com
PO Box 1236 (510) 558-9366
Berkeley, CA 94701-1236
NOTE: My ISP is having difficulties. If you have problems reaching me at
this e-mail address, you can leave a message at:
cisin(a)info.sims.berkeley.edu
fcisin(a)merritt.edu
5:26 p.m.
New subject: M2FM (was: ISIS & CP/M for MDS 225 series3
On Tue, 6 Nov 2001, Fred Cisin (XenoSoft) wrote:
I should have noted that I was referring to 8" diskettes.
- don
On Tue, 6 Nov
2001, Allison wrote:
> Standard CP/M on 8" is the right bios but.... The right media
> as the MDS controller was SD/D2... single density(normal ibm
> 128 byte sectors) and D2 was double density by m2fm and
> incompatable with everything except Intel. So you need
> another working intel box user.
On Tue, 6 Nov 2001, Don Maslin wrote:
> I am told that a WD1793 based controller can read M2FM. Have not tried
> it myself, though. Did not Altos use such a format with their MP/M
> disks? Although they may have had many more unique formats
than I'm aware of, I
have seen quite a few Altos MP/M diskettes that were very ordinary 96TPI
MFM, (and readable with a 765)
Does anyone have a good refernce to the internal details of M2FM?
--
Fred Cisin cisin(a)xenosoft.com
XenoSoft http://www.xenosoft.com
PO Box 1236 (510) 558-9366
Berkeley, CA 94701-1236
NOTE: My ISP is having difficulties. If you have problems reaching me at
this e-mail address, you can leave a message at:
cisin(a)info.sims.berkeley.edu
fcisin(a)merritt.edu
9029
days inactive
9029
days old
5 comments
4 participants
participants (4)
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ajp166＠bellatlantic.net -
cisin＠xenosoft.com -
donm＠cts.com -
edick＠idcomm.com