snipehunt%maple.decnet@PINE.CIRCA.UFL.EDU ("MAPLE::SNIPEHUNT") (10/26/90)
I think that a problem you'll run into is that the Kaypro's system tracks are single density, even though the rest of the disk is double density. As I don't have a Kaypro myself, I'm operating on what I recall reading somewhere some years ago, so caveat coorespondent! :-)
rzh@ICF.LLNL.GOV (R. Hanscom) (10/26/90)
snipehunt%maple.decnet@pine.circa.ufl.edu writes: > I think that a problem you'll run into is that the Kaypro's system tracks > are single density, even though the rest of the disk is double density. Is this correct?? I've never seen a Kaypro diskette like this. I thought that Cromemco was the only vendor to pull this trick!! What's the scoop?? roger rzh@lll-lcc.llnl.gov icf!rzh@lll-winken.llnl.gov
floyd@hayes.ims.alaska.edu (Floyd Davidson) (10/27/90)
In article <9010261511.AA21388@icf.llnl.gov.llnl.gov> rzh@ICF.LLNL.GOV (R. Hanscom) writes: >snipehunt%maple.decnet@pine.circa.ufl.edu writes: > >> I think that a problem you'll run into is that the Kaypro's system tracks >> are single density, even though the rest of the disk is double density. > >Is this correct?? I've never seen a Kaypro diskette like this. I thought >that Cromemco was the only vendor to pull this trick!! What's the scoop?? > No, kaypro disk format is double density on the system tracks too. I'm quite sure of this as I once dis-assembled and re-wrote the monitor ROM code to use quad density drives. (When it still cost money to get the source code for it.) When double density drives first came out there were a number of systems that did make the system tracks single density. The ones that I knew of were all 8" floppies though, but I suppose someone did it with 5 1/4 floppies too. Floyd -- Floyd L. Davidson floyd@hayes.ims.alaska.edu floydd@chinet.chi.il.us Salcha, AK 99714 connected by paycheck to Alascom, Inc. When *I* speak for them, one of us will be *out* of business in a hurry.
wieland@ea.ecn.purdue.edu (Jeffrey J Wieland) (10/28/90)
In article <9010261511.AA21388@icf.llnl.gov.llnl.gov> rzh@ICF.LLNL.GOV (R. Hanscom) writes: >snipehunt%maple.decnet@pine.circa.ufl.edu writes: >> I think that a problem you'll run into is that the Kaypro's system tracks >> are single density, even though the rest of the disk is double density. >Is this correct?? I've never seen a Kaypro diskette like this. I thought >that Cromemco was the only vendor to pull this trick!! What's the scoop?? The only Kaypros that used single-density system tracks were the original Kaycomp II's -- they had single-density drives. I think that the Xerox double-density formats had single-density boot tracks. I have a friend who put several 820-II's together, and I'll ask him about it (he still has his Big Board, but he uses an Amiga now). -- Jeff Wieland wieland@ecn.purdue.edu
alz@tc.fluke.COM (Al Weiss) (11/06/90)
>The only Kaypros that used single-density system tracks were the original >Kaycomp II's -- they had single-density drives. As a Kaycomp owner, I disagree. Single sided, double density on the original Kaycomp/Kaypro II's. But at least one of the Osbornes had single sided, single density on the whole floppy. -- Al Weiss alz@tc.fluke.com 206-356-5252 John Fluke Mfg. Co., Inc. MS-269E PO Box 9090 Everett, WA 98206-9090 USA
blh@PacBell.COM (Brian Holliday) (11/06/90)
In article <1990Nov6.001641.20927@tc.fluke.COM> alz@tc.fluke.COM (Al Weiss) writes: >>The only Kaypros that used single-density system tracks were the original >>Kaycomp II's -- they had single-density drives. > >As a Kaycomp owner, I disagree. Single sided, double density on the >original Kaycomp/Kaypro II's. But at least one of the Osbornes had >single sided, single density on the whole floppy. Non-Linear Systems demonstrated the Kaycomp II at a computer faire in San Francisco in 1981. It had single-sided single-density floppies -- for about 90K of data. This was similar to the Osborne. But when the computer started to be sold a few months later, the computer box had a different look, and the floppies were single-sided double-density -- for about 180K of data. Brian Holliday (...!pacbell!pbhyf!blh)
wieland@ea.ecn.purdue.edu (Jeffrey J Wieland) (11/07/90)
In article <1990Nov6.001641.20927@tc.fluke.COM> alz@tc.fluke.COM (Al Weiss) writes: >As a Kaycomp owner, I disagree. Single sided, double density on the >original Kaycomp/Kaypro II's. But at least one of the Osbornes had >single sided, single density on the whole floppy. I have a sales brochure from Non-Linear Systems for the Kaycomp -- it talks about the "big" 90 kilobyte disk drives. The machine pictured has two full-height drives, mounted vertically on either side of the crt. Also, the power switch and crt brightness control are on the front of the machine -- where they belong! -- Jeff Wieland wieland@acn.purdue.edu
donm@pnet07.cts.com (Don Maslin) (11/07/90)
alz@tc.fluke.COM (Al Weiss) writes: >>The only Kaypros that used single-density system tracks were the original >>Kaycomp II's -- they had single-density drives. > >As a Kaycomp owner, I disagree. Single sided, double density on the >original Kaycomp/Kaypro II's. But at least one of the Osbornes had >single sided, single density on the whole floppy. > >-- > >Al Weiss alz@tc.fluke.com 206-356-5252 >John Fluke Mfg. Co., Inc. MS-269E PO Box 9090 Everett, WA 98206-9090 USA As I recall, the program MFDISK for the Kaypro II listed a SSSD option under the Kaypro selection. So *some* model of Kaypro must have had SD tracks. Keeper of the CP/M System Disk | UUCP: {nosc ucsd crash ncr-sd}!pnet07!donm Archives for the Dino(saur)SIG | ARPA: simasd!pnet07!donm@nosc.mil - San Diego Computer Society - | INET: donm@pnet07.cts.com
donm@pnet07.cts.com (Don Maslin) (11/22/90)
This was thrashed through a while back. There may have been a very few of the
very early KayComp computers that used single density (throughout, rather than
just system tracks), but the Kaypro II, 4, 2, 2X, and 10 were all DD.
- don
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