Hi, 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: > > > > http://vintagecomputer.net/disk_images/Morrow/ > > > > 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 ([email protected]), KC3DRE
