Commodore Plus 4 and Commodore 16

Commodore Plus 4 and Commodore 16

Dan Bowman kindly pointed me to former Commodore engineer Bil Herd’s discussion of the ill-fated Commodore TED machines on Hackaday. Here in the States, few remember the TED specifically, but some people may remember that oddball Commodore Plus 4 that closeout companies sold for $79 in 1985 and 1986. The Commodore Plus 4 was one of those TED machines. So was the Commodore 16.

What went wrong with those machines? Commodore miscalculated what the home computer market was doing. The TED was a solution to too many problems, and ended up not solving any of them all that well. Arguably it’s more popular with vintage computer enthusiasts today than it was in the 1980s. Read more

What to look for in a motherboard

What to look for in a motherboard

I’ve been building PCs for more than 20 years and I tend to keep them a very long time, so it occurred to me that someone might be interested in what I look for in a motherboard to ensure both a long, reliable life and a long useful life.

Technology has changed a lot but what I look for has remained surprisingly consistent over the years.

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Commodore RAM expansion units

Commodore RAM expansion units

The 6502-family CPUs in Commodore 8-bit computers famously used 64K of RAM at a time. But in 1985, Commodore introduced a cartridge that added up to 512K of RAM to the 128. Commodore followed up soon after with a 256K cartridge for the 64. How did Commodore RAM expansion units work?

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Why did old PCs have a turbo button?

Why did old PCs have a turbo button?

Old PCs, especially PCs from the 1980s to the mid 1990s, have a button with the curious label “Turbo.” On some PCs, a number on the front changes when you push it, or an LED toggles on or off. Why did old PCs have a turbo button?

Turbo buttons are a quirk of old PCs, kind of like their beige color that tends to turn yellow, but it served a functional purpose.

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Commodore 256: The 8-bit that never was

Commodore 256: The 8-bit that never was

In 1985, Commodore followed up on its best selling Commodore 64 with a model with twice as much memory. The design of the 128 offered the possibility of following up with a Commodore 256. It never happened. Instead, Commodore moved on from 8-bit machines after the 128. Here’s why.

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Disadvantages of the 8086 microprocessor

Disadvantages of the 8086 microprocessor

An 8086-series microprocessor, the 8088, powered the original IBM PC. Its direct descendants power PCs to this day. Not only that, they power modern Macs too. This was always controversial, especially running Mac OS on Intel chips. Why? What are the disadvantages of the 8086 microprocessor?

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What happened to Compuserve?

What happened to Compuserve?

Compuserve was an online service for dialup modems from the 1970s to the 1990s. It was a way of getting online and communicating with others before the Internet was generally available to individuals. Later, it became a primary way for individuals to connect to the Internet, turning itself into an Internet Service Provider. But over time, it faded away into history. Here’s what happened to Compuserve.

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Why did IBM fail at PCs?

Why did IBM fail at PCs?

If you ask why did IBM fail, I assume you mean why did IBM ultimately fail in the personal computer market. IBM is still in business, after all. But its exit from the PC market after 24 years, including a period of dominance in the 1980s, does seem curious. And it raises another question: What does IBM do now?

I experienced IBM’s fall in this market firsthand. I sold computers at retail in 1994 and 1995. IBM’s computers at that time were no worse than anyone else’s, but I had an extremely difficult time selling them. Many consumers didn’t trust IBM and didn’t want to get somehow locked in. There was nothing wrong with those machines, but it sure was a lot easier to just sell them a Compaq.

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Where to buy vintage computers

Where to buy vintage computers

Collecting vintage computers can be fun. I also personally think it’s great that people are interested in preserving that history. Where to buy vintage computers hasn’t changed much over the years. It just may take a bit more work than it used to.

Some people think old computers are priceless. Others think they’re worthless. I don’t recommend wasting your time with people who think a Dell Pentium III laptop is worth $300. Think of the times you found a jewel for five bucks and keep moving.

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The IBM PS/1 (or IBM PS1)

The IBM PS/1 (or IBM PS1)

The IBM PS/1, sometimes called the IBM PS1, was a line of 1990s personal computer systems, not to be confused with the Sony Playstation video game console that’s also often called the PS1. The PS/1 was IBM’s second attempt at a mass market consumer PC, after the ill-fated PCjr.

You can neatly divide the PS/1 into two generations. While they ran the same software, they had major philosophical differences. Perhaps more than any other computer line, they represent IBM’s change of heart in the early 1990s as it tried to survive in an extremely competitive and crowded market.

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