Category Archives: OS/2

OS/2 6.304: Finally Complete

Posted on April 29, 2022 by Michal Necasek

Some time ago, I lamented that even though the OS/2 Museum had a good number of disks of the final OS/2 2.0 beta, level 6.304, there wasn’t enough to install the OS, let alone any of the development tools or … Continue reading →

Posted in CD-ROM, IBM, OS/2, PC history, Pre-release | 5 Comments

Page Too Big

Posted on April 22, 2022 by Michal Necasek

The other day I was able to look at an IBM OS/2 pre-release CD-ROM from early 1992. The CD-ROM appears to have been produced by IBM UK under the DAP (Developer Assistance Program) umbrella. The CD-ROM contains about 250 MB … Continue reading →

Posted in Documentation, IBM, OS/2, PC history | 4 Comments

Where Did CP852 Come From?

Posted on February 15, 2022 by Michal Necasek

In the 1990s, a lot of my documents were written in code page 852 (CP852), also known as PC Latin 2. This code page is sometimes called “Eastern European”, which is a bit misleading, given that it does not cover … Continue reading →

Posted in DOS, I18N, IBM, Microsoft, OS/2, PC history | 47 Comments

OS/2 6.304: Who Has More?

Posted on June 11, 2021 by Michal Necasek

Yet another interesting item that I recently ran through a Kryoflux is a set of 30 floppies labeled “IBM OS/2 Version 2.0 Pre-release Evaluation Copy – 6.304”. In this case, there’s no mystery as to what it is: 6.304 was … Continue reading →

Posted in Archiving, IBM, OS/2, Pre-release | 8 Comments

OS/2 1.2 EE DAP

Posted on June 2, 2021 by Michal Necasek

That same shoebox I mentioned the other day also contained three plain cardboard 3.5″ floppy boxes with a set of disks that look like this: Once again, despite the plain-looking labels, these are mass-duplicated floppies, which is handy because Kryoflux … Continue reading →

Posted in Archiving, IBM, Kryoflux, OS/2, PC history | 2 Comments

Archival Puzzles

Posted on May 28, 2021 by Michal Necasek

Every now and then I attack the large amount of floppy disks in my basement and run a bunch of them through Kryoflux. This time it was a shoebox full of OS/2 related floppies. Among them was a very incomplete … Continue reading →

Posted in Archiving, IBM, Kryoflux, OS/2, Pre-release | 30 Comments

Installing IBM OS/2 1.0 in a VirtualBox VM

Posted on April 30, 2021 by Michal Necasek

Some time ago I wrote that IBM OS/2 1.0 and 1.1 cannot be installed in a VM due to the way it switches between real and protected mode. At the time I did not realize that there was another obstacle, … Continue reading →

Posted in OS/2, VirtualBox, Virtualization | 18 Comments

MS LAN Manager NDDK Anyone?

Posted on April 2, 2021 by Michal Necasek

For R&D purposes, I would very much like to get my hands on the circa 1991 Microsoft LAN Manager Network Device Driver Kit which was meant to support the development of NDIS 2.0 drivers. While it is obvious that some … Continue reading →

Posted in Development, DOS, Microsoft, Networking, OS/2 | 10 Comments

Complications, Complications

Posted on February 19, 2021 by Michal Necasek

The other day someone asked how hard it would be to modify the Open Watcom linker, wlink, to properly support exports from IOPL segments in OS/2 LX modules. Not terribly hard it turned out, all it needed was to emit … Continue reading →

Posted in Development, OS/2, Watcom | 2 Comments

OS/2 1.3 on a “Large” Disk

Posted on March 6, 2020 by Michal Necasek

In response to a reader question, I started wondering how difficult it actually is to install OS/2 1.3 on a “big” hard disk, where “big” is defined as more than about 500 MB. In an attempt to reduce the number … Continue reading →

Posted in BusLogic, OS/2, PC history, Storage | 16 Comments