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

>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,

>5.25 and 3.5 inch media, However I have yet to find anyone with the 8

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 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(a)wps.com> >To: "General Discussion: On-Topic Posts Only" <cctech(a)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

>> 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