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Hayes compatible modem: What it means

Dave Farquhar Retro Computing April 7, 2026April 7, 2026

A lot of software advertises itself as working with a Hayes modem or Hayes compatible modem. What does that mean? And what’s Hayes? It’s a de facto standard named after a defunct maker of modems. Let’s talk about why Hayes was important. It was so important, you can even still buy a USB Hayes compatible modem for legacy applications today.

Hayes introduced a command set that started with the letters AT, for ATtention. Other makers adopted this command set and cloned the Hayes modem to various degrees, leading to the terminology of a Hayes compatible modem.

Windows 3.1 released April 6, 1992

Dave Farquhar Retro Computing April 6, 2026April 6, 2026

Released April 6, 1992, Windows 3.1 was the successor to the very successful Windows 3.0. It wasn’t great, just like Windows 3.0 wasn’t great. But it was a graphical user interface that ran on very inexpensive ordinary PCs, and enough people considered it good enough that it more or less ensured the future belonged to Windows.

AMD K6 released April 2, 1997

Dave Farquhar Retro Computing April 3, 2026April 15, 2026

AMD launched its K6 microprocessor on April 2, 1997. It was a competitor for Intel’s Pentium II CPU, but unlike the Pentium II, it plugged into the previous-generation Pentium socket. Being less expensive than a Pentium II and using less expensive motherboards, the AMD K6 allowed for much less expensive PCs. The K6 competed successfully with Intel.

The K6 cost between $244 and $469 at launch time. That undercut Intel by about 35%.

Thomas Rattigan, short-lived Commodore CEO

Dave Farquhar Retro Computing April 2, 2026April 2, 2026

On April 23, 1987, Thomas Rattigan drove to work just as he would any other day. But when he arrived at Commodore’s office building in suburban Philadelphia that morning, company guards informed him he’d been fired. They escorted him from the premises, not even giving him a chance to gather his family photos from his desk. It sounded like a cruel April Fool’s joke, but it wasn’t April Fool’s Day. That was the day Commodore promoted him, on April Fool’s Day 1986.

Rattigan ended up having the last laugh, although it took a few years.

How Tandy bought Radio Shack

Dave Farquhar Retail, Retro Computing April 1, 2026March 1, 2026

On April 1, 1963, Charles Tandy booked one of the junior ballrooms at the Ritz-Carlton in Boston and put out a call to Radio Shack employees to meet there that evening. There were rumors of changes afloat, but no one knew anything specific. That night, about 40 employees assembled in the ballroom where Tandy and C.O. Buckalew, one of his accountants, were waiting for them. “I’m Charles Tandy from Fort Worth, Texas,” he said to the group. “I now own Radio Shack.”

How Mark Cuban became rich

Dave Farquhar Retro Computing April 1, 2026April 1, 2026

April 1, 1999 was no April Fool’s joke for Mark Cuban. On that day, he sold his company, broadcast.com, to Yahoo for $5.7 billion and became a billionaire. The deal doesn’t make a lot of sense today, but at the time, it was possible to see what Yahoo was thinking. Meanwhile, Mark Cuban did fine for himself, buying sports teams and starring on TV’s Shark Tank.

Quantum hard drives

Dave Farquhar Retro Computing March 31, 2026March 31, 2026

Quantum was one of several hard drive manufacturers who thrived in the shadow of Seagate and Western Digital in the late 1980s and through the 1990s. On March 31, 2001, Quantum merged with Maxtor, another smaller, independent drive manufacturer. The $1.3 billion acquisition made Maxtor larger than Seagate, however briefly. But the expected $6 billion in annual revenue for the combined company never panned out.

I made no secret about my high regard for Quantum hard drives back when they were new. But Quantum hard drives are notorious in the retro community today. I think I can explain what’s going on.

What happened to Procomm Plus

Dave Farquhar Software March 30, 2026March 30, 2026

Procomm Plus was the ultimate terminal emulator of the late 1980s and early 1990s. It was a product of Datastorm, a small software company based in Columbia, Mo., a college town about halfway between St. Louis and Kansas City. Obsolete for years because of the decline of BBSs and big iron computing, it still has a niche following among hobbyists who like vintage minicomputers and mainframes, because it can emulate almost any terminal you might want.

It was 30 years ago, on March 28, 1996, that Datastorm ended its run as an independent software publisher.

AMD K5 CPU: Not quite what AMD hoped

Dave Farquhar Retro Computing March 27, 2026March 27, 2026

The K5 is AMD’s first x86 processor to be developed entirely in-house. Introduced March 27, 1996, its primary competition was Intel’s Pentium microprocessor. The K5 was an ambitious design, closer to a Pentium Pro internally than a Pentium. However, the final product was closer to the Pentium regarding performance, although faster clock-for-clock compared to the Pentium. The “K” in the name K5 stood for Kryptonite. AMD, being an underdog compared to Intel, hoped the K5 be the undoing for the Superman-like Intel.

The Melissa virus of 1999

Dave Farquhar Retro Computing, security March 26, 2026March 26, 2026

The Melissa virus was a mass-mailing macro virus from March 1999. It was one of the more notorious computer viruses of the 1990s, and reportedly the author named it for a dancer he met in a Florida nightclub. Authorities quickly identified the author, David Lee Smith, and arrested him in New Jersey on April 1, 1999. He served two and a half years in prison and paid $7,500 in fines for creating the virus.