Morrow 8" disk image CP/M uploaded

Mark G Thomas Mark at
Thu May 11 12:15:39 CDT 2017


On Thu, May 11, 2017 at 11:31:21AM -0400, Mark G Thomas via cctalk wrote:
> Hi Bill,
> On Tue, May 09, 2017 at 09:56:15PM -0400, william degnan via cctalk wrote:
> > Hi,
> > 
> > I was contacted though my site by someone looking for a boot disk for their
> > California Computer System S-100 2200 computer with Morrow's Disk Jockey
> > DJ/DMA floppy disk controller.  I checked and found what might be a
> > suitable disk.
> > 
> > I imaged the disk and the file has been uploaded to my web site along with
> > a PDF of the directory the original owner printed and inserted into the
> > disk sleeve. Does anyone have such a drive controller and would like to
> > take a look at this image to see if it's usable?  Uploaded, here:
> > 
> >
> > 
> > There may be something wrong with the disk.  The label reads
> > 8" Morrow E14 Phil's System Disk Backup 9/22/86
> > Permanent error on boot track
> > 
> > Despite what was printed on the lable I was able to image the disk without
> > error.  I am hoping the error referred to in the hand-written label is not
> > a physical error and can be edited/corrected.  Maybe this disk is
> > salvageable, maybe the error is a BIOs thing.
> > 
> > There was talk about trying to find a diskJockey boot disk on this list a
> > few weeks ago (right?), if so I hope this is useful.  If anyone attempts to
> > read, let me know how it goes.
> > 
> > Bill
> There are at least two different versions of this controller, with different
> ROM decode addresses. It's non-trivial to modify the card -- not just a jumper
> and PROM to change. The boot disk is specific to which version of the
> card. I have the earlier version of the card with the BIOS at E000H, and
> have been meaning to try the images from Herb's disks.
> These cards are nice in that they include a serial port, so the provided 
> CP/M boot disk and CBIOS will boot up to a functional enough system
> to further configure for specific hardware, solving the chicken and
> egg problem with CP/M BIOS and hardware configuration.
> Newer versions of this card have BIOS at F800H, which Mike Loewen has
> images for, which are probably good, for that version of the card.
> It would be helpful if the person inquiring could determine which version
> of the card they have.
> When I was working on this, I found manuals for both versions on Bitsavers
> (I think), which should have enough info to match up with the card:
> 0xE000 Morrow Disk Jockey 2D Floppy Controller Users Manual 1980 rev2.pdf
> 0xF800 Disk_Jockey_2_Model_B_Technical_Reference_Rev_1_Dec82.pdf
> Please feel free to put the person inquiring in contact with me. I'd like
> to get mine booting, and may be able to help them do similarly.

Sorry to follow up my own post, but I realized after I posted this
that the DJ/DMA is a different product than the DJ/2D models I incorrectly
responded about, so I don't have anything to offer here.

Mark G. Thomas (Mark at, KC3DRE

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