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Monthly Archives: October 2013
More on LOADALL and OS/2
As previously mentioned, IBM’s OS/2 1.0 and 1.1 used the 286 LOADALL instruction, even on 386 and later processors which do not support it. This was typically solved by BIOS emulation. Now there’s more information about how OS/2 uses LOADALL. … Continue reading
Posted in IBM, Intel, Microsoft
31 Comments
The Carolina Mystery
On the weekend I decided to examine my old PowerPC 604 system. The case is from a RS/6000 type 7248, but the actual system board is from a Power Series 830. This is the famous Carolina board (or “planar” in … Continue reading
Posted in IBM, PowerPC
6 Comments
LOADALL Strikes Again
A minor mystery recently popped up while running IBM’s OS/2 1.1 (1988), the first OS/2 version with the Presentation Manager GUI. While Microsoft’s and IBM’s releases of OS/2 were fully compatible from application perspective, there were differences in the drivers … Continue reading
IBM ThinkPad Power Series 850
In the mid-1990s, IBM and Motorola unsuccessfully tried to create a new personal computer platform built around PowerPC RISC processors. Apple was initially a member of the alliance called AIM (Apple/IBM/Motorola) and used PowerPC processors in its own Macintosh systems … Continue reading
Posted in IBM, PowerPC
40 Comments
Ctrl-Alt-Del Myths
In a recent interview at Harvard University, Bill Gates claimed (around 16:35 mark) that Windows uses Ctrl-Alt-Del as a logon key combination because “IBM didn’t want to give [Microsoft] a single button”. This statement is curious because it takes several facts … Continue reading
Posted in Microsoft, PC hardware
8 Comments
Taking Screenshots of OS/2 on ThinkPad 850
An article about OS/2 on a PowerPC-based ThinkPad 850 needed a few screenshots for illustration. Once an OS is installed and running a GUI, it’s typically possible to run a screen grab utility and capture screenshots digitally. But that’s not an … Continue reading
Posted in OS/2, PowerPC
4 Comments