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Category Archives: OS/2
Stack Checking on OS/2
A while ago I was involved in debugging a seemingly simple yet mysterious problem: A piece of code (a fairly simple interface DLL) built with the Open Watcom compiler was failing with a bogus stack overflow error. The mystery was … Continue reading
Posted in Debugging, Development, OS/2, Watcom
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Programming NetBIOS on OS/2
Recently I spent some time trying to understand a piece of networking code, and it turned out to be far more difficult than it should have been. The code in question is the NetBIOS interface of C-Kermit and was originally … Continue reading
Posted in Development, Documentation, IBM, Microsoft, Novell, OS/2
10 Comments
OS/2 TCPBEUI Name Resolution
Sometimes I have the following problem to deal with: An OS/2 system uses NetBIOS over TCP/IP (aka TCPBEUI) and should communicate with a SMB server (likewise using TCPBEUI) on a different subnet. This does not work on OS/2 out of … Continue reading
Posted in IBM, Networking, OS/2, TCP/IP
49 Comments
OS/2 2.0 Commitments
Last week the OS/2 Museum received a rather interesting donation: a thick spiral bound document titled Third party commitment to IBM’s OS/2 Version 2.0, and labeled IBM COMDEX/SPRING ’92. The binder is a collection of about 250 press releases that … Continue reading
Posted in IBM, Marketing, OS/2, PC history
8 Comments
OS/2 2.11 SMP Woes
IBM OS/2 V2.11 for Symmetric Multiprocessing (OS/2 2.11 SMP) was released in mid-1994 in response to Windows NT and its SMP support. The package was nothing more (and nothing less) than OS/2 V2.11 with support for SMP hardware. It was … Continue reading
Posted in IBM, OS/2, PC history, SMP
31 Comments
Digging Into OS/2 2.0
The other day I had a “pressing” need to obtain the list of modules loaded in an OS/2 VM by examining the VM’s memory and CPU state. I was able to use existing code that worked on OS/2 V3.0 (Warp) … Continue reading
Posted in Debugging, Documentation, IBM, OS/2
21 Comments
More MS OS/2 2.0
Over the last few weeks, two “new” pre-releases of OS/2 2.0 have been found in ancient warez archives. The first is OS/2 2.0 build 6.64, released in early April 1990: In general, this build is not substantially different from the … Continue reading
Posted in IBM, Microsoft, OS/2, Pre-release
5 Comments
The Future That Never Was
Microsoft OS/2 2.0 SDK Pre-Release 2, June 1990 In 1990, the strategic PC operating system of Microsoft and IBM was not DOS, not Windows, but OS/2. The first 16-bit OS/2 was initially released in 1987 with a reduced feature set, … Continue reading
Posted in 386, IBM, LAN Manager, Microsoft, OS/2, PC history, Pre-release
76 Comments
Retro-Porting to OS/2 1.0
A few weeks ago I embarked on a somewhat crazy side project: Make the Open Watcom debugger work on OS/2 1.0. This project was not entirely successful, but I learned a couple of things along the way. The Open Watcom … Continue reading
Posted in Development, IBM, Microsoft, OS/2, Watcom
10 Comments
Slovenian OS/2 Warp 4
This is a guest post written by Marko Ć tamcar from the Slovenian Computer Museum in Ljubljana. Additional context and commentary from the OS/2 Museum can be found at the end of the article. Slovenia being a tiny country with a … Continue reading
Posted in IBM, OS/2, PC history
15 Comments