Category Archives: Compaq


As most everyone knows, the AT Attachment standard (informally known as IDE) started by literally bolting the previously standalone AT disk controller onto a MFM drive with a ST506 interface and connecting the assembly to the host system with a … Continue reading

Posted in Compaq, Documentation, IDE, PC hardware, PC history, Storage | 33 Comments

Breaking Into ASOS

The OS/2 Museum recently acquired a Quantum Bigfoot TS hard disk in mint condition. The Bigfoot drives, as some readers may remember, were rather oddball late-1990s 5.25″ IDE drives that were cheap, slow, and relatively big. There was a sticker … Continue reading

Posted in Compaq, PC history, SCO | 4 Comments

Well Hello

So after some furious disassembling, assembling, and linking, things got this far: It took longer than it ought to have because although IDA is great, I couldn’t figure out how to make it work with GW-BASIC’s bizarre segment usage. The … Continue reading

Posted in Compaq, Microsoft, PC history, Source code | 5 Comments

Deskpro 386 at 30

30 years ago, in September 1986, Compaq announced the Deskpro 386, a PC as revolutionary as it was conservative. Compaq decided to¬†forge its own path and not wait for IBM to introduce a 386-based PC. At the same time, Compaq … Continue reading

Posted in 386, Compaq, IBM, PC history, PC press | 18 Comments

Original CEMM Unearthed

An important fragment of PC history was unearthed a few days ago: An image of a Compaq Deskpro 386 supplemental disk from August 1986, containing among other things CEMM.EXE, Compaq’s original expanded memory emulator shipped with the Deskpro 386. The … Continue reading

Posted in 386, Compaq, DOS | 28 Comments