Last revision of this page: February 6, 2025

Micro Solutions has released two different versions of UniDOS. First a pure software solution and second a plug-in card with a Zilog Z80 processor.

• UniDOS
• UniDOS Z80 card

Software versions

I am currently aware of two different (main) versions of the UniDOS program that can be found on the Internet:

• 1.11: no Z80 card necessary
• 1.27z: Z80 card is necessary

I use the UniDOS version 1.11 on my 286 AT in combination with a CompatiCard I and UniForm. As described here, I could start Wordstar (V2.26) with UniDOS directly from an 8 inch floppy disk and work with it.

Command line options

Since I don't have a manual, I tried the command line options on luck and see, there are at least three variants.

1. /A : Apple CP/M option
2. /C : Keyboard/Video driver installation
3. /V : NEC V series chip mode

Three other command line options (/B, /R, /X) are described in the UniDOS Notes V1.11.

Running CP/M programs

If you are using UniForm-PC with a CP/M drive, you can start the CP/M *.COM program directly on the UniForm drive. If you have copied the CP/M programs to the hard disk, then you must rename the CP/M *.COM files to *.CPM. Afterwards you can start these files directly, like otherwise a *.COM file.

The following two pictures show the Z80 coprocessor card. These pictures are from the internet. I myself have no Z80 card, I am still looking for ...

Rev-A?, ~1984

Rev-B, 1988

This is the only information I have. I have no manuals.

• UniDOS Notes V1.11 (05/1986)
• UniDOS Notes V1.27 (07/1988), for Z80 card

1. (↑) Rolf Strand, Crystal, Minnesota (MN), USA

• Part 1: The Three Musketeers
• Part 2: The CompatiCard
• Part 3: UniForm-PC – UniForm
• Part 4: UniDOS