Monthly Archives: December 2015

Missing Intel SDM Documents

Posted on December 30, 2015 by Michal Necasek

I’ve been trying to complete my archive of Intel SDM documents circa 2000 and later. I have most of the editions archived but a few are missing. Readers of this blog could have something stashed away too, so perhaps someone … Continue reading →

Posted in Documentation, Intel | 11 Comments

Lies, Damn Lies, and Wikipedia

Posted on December 26, 2015 by Michal Necasek

While researching the history of 486s for a previous article, I came across a fascinating Wikipedia entry and its associated talk page. It’s a nice showcase of inmates running the asylum, and a reminder that Wikipedia can’t be considered an authoritative … Continue reading →

Posted in 486, Intel, PC history | 37 Comments

Intel OverDrive Part I: 486 OverDrive

Posted on December 13, 2015 by Michal Necasek

Intel had a long history of offering retail processor upgrades for PCs. The last and by far the best known of those were the Intel OverDrive processors. But let’s start with the earlier history. In 1987, Intel released the Inboard 386/AT, … Continue reading →

Posted in 486, Intel, PC history | 6 Comments

Intel 486 Errata?

Posted on December 6, 2015 by Michal Necasek

There don’t seem to be any specification updates or errata lists for any Intel 486 CPU anywhere. It’s odd because there are specification updates for 386s (and of course Pentiums) from Intel, and because the embedded 486s continued to be … Continue reading →

Posted in 486, Intel, PC history | 22 Comments