Category Archives: PC history

GW-BASIC Source Notes

Posted on June 23, 2020 by Michal Necasek

When I learned that Microsoft released the GW-BASIC source code, I was mildly curious to find out what is or isn’t there. The short answer is that there’s a whole lot, but a lot is also missing. Spelling note: Both … Continue reading →

Posted in Microsoft, PC history, Source code | 20 Comments

PCLP CSD Hunt

Posted on June 21, 2020 by Michal Necasek

Not long ago the OS/2 Museum acquired a boxed copy of the IBM PC LAN Program (PCLP) version 1.3 (1988) on 3.5″ floppies. The IBM PC Network Program (1985), later renamed to the IBM LAN Program, was IBM’s first PC … Continue reading →

Posted in Archiving, IBM, Networking, PC history | 9 Comments

Memory Trouble in Stormville

Posted on April 18, 2020 by Michal Necasek

The OS/2 Museum recently acquired a genuine Intel DX79SR (Stormville) board. Together with its close siblings DX79SI (Siler) and DX79TO (Thorsby), these were the last “great” Intel motherboards, supporting the big LGA 2011 socket for the Sandy Bridge E platform—but … Continue reading →

Posted in Bugs, Intel, PC hardware, PC history | 14 Comments

386 Cache Coherency

Posted on April 8, 2020 by Michal Necasek

I’ve been slowly chewing my way through U.S. Patent 5,724,549, titled Cache Coherency without Bus Arbitration Signals, initially filed by Cyrix Corporation in 1992 and published in 1998 (when it was utterly irrelevant, but such is the life of patents). … Continue reading →

Posted in 386, Cyrix, PC architecture, PC history | 18 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

Emulating EtherLink

Posted on January 31, 2020 by Michal Necasek

Spurred by the discovery of a pre-release OS/2 NetWare Requester from early 1988 with a very thin selection of drivers, several months ago I decided to write emulation of the classic 3Com 10Mbps Ethernet 3C501 card, also known as EtherLink. … Continue reading →

Posted in 3Com, Networking, PC hardware, PC history, Virtualization | 33 Comments

Another Strange 286 Board

Posted on January 20, 2020 by Michal Necasek

The OS/2 Museum sometimes seems to have a knack for acquiring hardware so obscure that it cannot be even identified. One of the more recent arrivals was a seemingly typical Baby AT 286 board with an 8 MHz CPU. The … Continue reading →

Posted in 286, PC hardware, PC history | 27 Comments

The Cape Cod Disaster

Posted on December 16, 2019 by Michal Necasek

Here’s a motherboard Intel very quickly wanted to forget about: It’s the Intel CC820—or Cape Cod—desktop board, a product that was late to market (not unusual) and within a few months, the subject of a recall (quite unusual). As the … Continue reading →

Posted in Bugs, Intel, PC hardware, PC history, Pentium III, RDRAM | 45 Comments

Power Trouble

Posted on December 5, 2019 by Michal Necasek

This will not come as a surprise to anyone who is deeply familiar with PC hardware; the other 99% please bear with me. A good quality and compatible power supply is crucial to the healthy operation of a PC. The … Continue reading →

Posted in PC hardware, PC history | 13 Comments

The i860 Conspiracy

Posted on November 10, 2019 by Michal Necasek

I’ve been thinking of acquiring a board with the Intel 860 (Colusa) chipset. This chipset is historically interesting because it was Intel’s first chipset for NetBurst Xeons, and–at least according to Intel–the only chipset that supports the original Foster Xeon … Continue reading →

Posted in Intel, PC hardware, PC history | 15 Comments