CPM was Re: MDOS (Motorola EXORciser) disk format ?

From: James M. Walker <chejmw_at_acsu.buffalo.edu>
Date: Tue Nov 4 09:02:44 2003

Ah Joe,
I asked about CP/M-86 not just CP/M! I also have an MDS-800 and a Series II
that run CP/M-80. They also run ISIS and RMX, no matter. What I am looking
for
is an original CP/M-86 Boot disk as per the manual that works with the Intel
SBC
86/12. The newer copy of CP/M-86 for the IBM PC, at least the copy I have is
in 5.25 format for the "PC" and has the drivers already loaded on the disk
for that
system. However the original CP/M-86 was also developed for and ran on the
SBC-86/12 so states the manual and That is what I am looking for!
Thanks
Jim
WB2FCN

----- Original Message -----
From: "Joe" <rigdonj_at_cfl.rr.com>
To: "General Discussion: On-Topic and Off-Topic Posts"
<cctalk_at_classiccmp.org>
Sent: Monday, November 03, 2003 8:19 PM
Subject: CPM was Re: MDOS (Motorola EXORciser) disk format ?


> At 04:06 PM 11/3/03 -0500, you wrote:
> >Hi,
> >Jim here with an on topic question. Since the mention of CP/M, et al, I
have
> >been
> >looking for the CP/M-86 original version 1.0 on the 8 inch single density
> >floppy. I
> >have the manuals (reprints/copies). I also have CP/M-86 for the IBM-PC,
on
> >5.25 and 3.5 inch media, However I have yet to find anyone with the 8
inch
> >disk
> >that is the bootable version. This ran on the Intel 86-12 CPU board
>
> THE original CPM run on an Intel MDS-800 system with an 8080 CPU. That
> was LONG before the Intel 86/12 card came out. Go look at the code in the
> back of the manual.
>
>
> and had
> >drivers
> >that could be modified for various devices. I have an IDE driver software
> >fix that
> >will let me use IDE drives with my SBC-86/12 system. Any help out there?
>
> I have CPM running on the MDS-800 with 8" drives but IIRC it's ver 2.2.
> Dave Mabry might have an older version.
>
> Joe
>
> >
> >Thanks
> >Jim
> >WB2FCN
> >
> >----- Original Message -----
> >From: "Tom Jennings" <tomj_at_wps.com>
> >To: "General Discussion: On-Topic Posts Only" <cctech_at_classiccmp.org>
> >Sent: Monday, November 03, 2003 3:13 PM
> >Subject: Re: MDOS (Motorola EXORciser) disk format ?
> >
> >
> >> On Sun, 2003-11-02 at 14:54, Fred Cisin wrote:
> >> > > A friend of mine has a pile (55) 8" floppies which were created
> >> > > on a Motorola EXORciser MDOS system. Does anyone know if the data
> >> > > on these disks can be recovered on a CPM system or similar, or will
> >> > > he need to find an EXORciser?
> >>
> >> CP/M, since it's so close to the iron anyways, is probably a good way
to
> >> do a sector dump of the disk. Copy it to a modern machine and
> >> post-process the data.
> >>
> >> Getting the sector data off is the task. If it's hard-sectored, you're
> >> probably screwed. (Turn the diskette inside it's sleeve; there should
> >> only be one (a pair?) of index holes. If you see 12 or so holes it's
> >> hard-sectored. Not many 8" diskettes were hard sectored.)
> >>
> >> There were two flavors of floppy controller chip in the 70's and 80's,
> >> th Western Digital chips and the NEC 765. I always preferred the WD
> >> chips (1791? 1793? I forget!) They were the best for diskette hacking.
> >> They would read any damn old FM or MFM signal, and you could dump to
> >> memory and do the bit extraction in software. Very cool. The NEC765,
> >> though nominally easier to do certain things, was a lot less flexible
> >> and far more fussy about format.
> >>
> >> (I used to run my 86DOS 0.86/MSDOS1.25/MSDOS2.00 system on DSDD 8"
> >> floppies with 9 1K sectors per track. I thought I was very cool for
> >> doing this (cringe)).
> >>
> >> The short of it is, if you have a CP/M system with a WD controller, you
> >> can write nice dumb code to do a 'track dump' if you have enough memory
> >> or a sector dump if you don't and see what's electrically on the
> >> diskette.
> >>
> >> I wish I had all my old data. I used to pore over floppy track dumps
and
> >> could read the MFM header (it's easy) to determine all sorts of stuff.
> >> It's not mysterious, just obscure.
> >>
> >>
> >
> >
>
>
Received on Tue Nov 04 2003 - 09:02:44 GMT