[rescue] Osbourne Executive, can't get er to boot

gsm at mendelson.com gsm at mendelson.com
Wed Aug 18 17:21:47 CDT 2010

On Wed, Aug 18, 2010 at 05:34:52PM -0400, Ethan O'Toole wrote:
>I have an Osbourne Executive.

I looked it up on the Wikipedia and it says that it had single sided
double density disks. 

>I tried the IMD files I found on one site, that are supposed to be 
>the 3 CP/M system disks. One point of confusion to me is that the 
>Exec. was supposed to have DD/DD floppies. But the images are all 
>single sided.
>I've tried writing the disks with IMD using the actual osbourne 
>floppy drive, and switched drives.

>Anyone have experience with these things?

no, but I have a lot of experience with CP/M systems in general. 

A 5/14 SSDD disk should hold enough to boot, have wordstar on it and a few
documents. The executive has two drives, so there should be plenty of space
on it. 

If I remember correctly, there are problems writing disks that can be
read on 40 track drives with 80 track drives. In plain English disks
written on a drive that predates the PC/AT will have trouble reading disks
written on quad density (720k) 5 1/4 drives or AT (1.2g) drives.

There may also be problems writing the disks using older programs with
modern floppy controllers. 

There is a way to do it, but I can't at the moment remember how. I just 
remembered that you had to look for "BBC Acorn floppy disks" to find it.


There also is on a very old PC/Blue library disk a CP/M emulator for DOS.
If you can get the files off of the disks, then you can run the programs
under the emulator. I understand that is not what you want to do, but if you 
have files that you need to use and can't get the Osborne to run, it might



Geoffrey S. Mendelson N3OWJ/4X1GM
To help restaurants, as part of the "stimulus package", everyone must order 
dessert. As part of the socialized health plan, you are forbidden to eat it. :-)

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