Compaq MS-DOS 3.1

In support of my two Compaq Portables (II and III), I got myself a copy of the official Compaq 3.1 version of MS-DOS and BASIC. At least for the Compaq Portable II, my understanding is that this is the latest version (oddly, apart from MS-DOS 6.0) that it can run. I had a version of these disks already from the net, but those were in German—these disks are not. I also scanned in the manuals and the box. Links to the disk images (360k .img files) and the manuals are below. I’ve successfully booted from them and briefly used them from within VirtualBox, so they should be ok. Next up will be to create real floppies from the images and install the system on the Compaq Portables, but one thing at a time.

Compaq msdos basic box front thumb Compaq msdos basic box side thumb Compaq msdos basic box back thumb
Compaq msdos basic box labels thumb
Msdos v3 reference guide Basic v3 reference guide

Links to the scans:

Posted in Uncategorized and tagged , , .


  1. Hello, the 2 links give the same BASIC version 3 Reference guide, impossible to get the MS-DOS 3.1 Reference guide.

    Thanks to your help


      • I been playing around with my compaq portable 2, and worked out that if you convert the image files. and mount them via loop device on linux, when you enter the floppy image, you will discover .exe applications. i copied them to the root of c:\compaq , and can run the configuration utilities from there.

Comments are closed.