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CPU vs core, or core vs processor

Dave Farquhar Hardware July 15, 2018July 29, 2018amd, intel

Here’s a good question I heard the other day: What’s the difference between a CPU and cores, or the difference between the number of CPUs and the number of cores in a system? The CPU vs core or core vs processor distinction, it turns out, is subtle.

As far as the operating system is concerned, there is no difference, but I’ll explain why. For you, there might be a difference.

Dave Farquhar

David Farquhar is a computer security professional, entrepreneur, and author. He started his career as a part-time computer technician in 1994, worked his way up to system administrator by 1997, and has specialized in vulnerability management since 2013. He invests in real estate on the side and his hobbies include O gauge trains, baseball cards, and retro computers and video games. A University of Missouri graduate, he holds CISSP and Security+ certifications. He lives in St. Louis with his family.

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What to look for in a motherboard

Dave Farquhar Hardware April 15, 2018October 28, 2021amd, asus, IBM, intel, Intel Core, memory slots, micro atx, pcie, VGA

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.

Dave Farquhar

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Expanded vs Extended memory, or EMS vs XMS

Dave Farquhar Retro Computing August 11, 2017October 5, 2019Bill Gates, intel, memory slots, XT

DOS veterans may remember messing with expanded and extended memory to get memory above 640K. Here’s what you need to know about expanded vs extended memory, or EMS vs XMS. They are two different approaches to solving the same problem.

Dave Farquhar

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Commodore 64 Z80 cartridge

Dave Farquhar Retro Computing August 9, 2017April 3, 20231541, 1980s, 6502, apple, apple ii, commodore, commodore 64, intel, MOS, spartan

One of the most popular add-ons for an Apple II added CP/M compatibility. So I guess it should be no surprise that Commodore tried the same thing. But the Commodore 64 CP/M operating system and the associate Commodore 64 Z80 cartridge was a flop. Why?

Dave Farquhar

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Disadvantages of the 8086 microprocessor

Dave Farquhar Hardware, Retro Computing July 11, 2017August 11, 20176502, amd, apple, Apple Lisa, DEC, IBM, intel, MOS, motorola, x86

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?

Dave Farquhar

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Why did IBM fail at PCs?

Dave Farquhar Retro Computing July 3, 2017October 4, 20211980s, 1990s, acer, AIX, apple, compaq, datacenter, dell, hp, IBM, intel, lenovo, mainframe, Packard Bell, Personal Computer, proprietary unix, thinkpad, unix, VHS, XT

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.

Dave Farquhar

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Where to buy vintage computers

Dave Farquhar Retro Computing June 28, 2017February 13, 20221541, 1980s, commodore, dell, electric trains, estate sales, garage sale, garage sales, IBM, ibm pcjr, intel, Kansas City, Missouri, recycling, survivors, Tandy, Texas Instruments, TI, Value Village, vintage computer, vintage trains

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.

Dave Farquhar

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Computers in 1985: It was a very good year

Dave Farquhar Retro Computing June 22, 2017May 19, 20201980s, 6502, amiga, AOL, apple, apple ii, atari, atari st, Bill Gates, commodore, commodore 128, commodore 64, Commodore Amiga, compaq, Digital Research, IBM, intel, jack tramiel, macintosh, New Wave, nintendo, quantumlink, radio shack, Steve Jobs, Tandy, tandy 1000, unix, video game

In some ways, 1985 was a really pivotal year for computing. The industry was changing fast, but in 1985, many relics from the past were still present even as we had an eye for the future. Here’s a look back at computers in 1985 and what made that year so interesting.

I think 1985 was interesting in and of itself, but it also made the succeeding years a lot more interesting. A surprising amount of the technology that first appeared in 1985 still has an impact today.

Dave Farquhar

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What happened to Digital Equipment Corporation?

Dave Farquhar Retro Computing June 20, 2017October 3, 20181980s, 1990s, altavista, amiga, apple, commodore, compaq, computer security, d-link, DEC, Digital Equipment Corporation, Digital Research, firewall, hp, IBM, intel, lexmark, linksys, macintosh, netgear, PIP, spam, syntax, unix, windows nt, x86

Digital Equipment Corporation was perhaps the second most important computer company in history, behind IBM. Its minicomputers challenged IBM, and, indeed, Unix first ran on a DEC PDP-7. DEC’s Alpha CPU was one of the few chips to make Intel nervous for its x86 line. It created the first really good Internet search engine. In a just and perfect world, DEC would still be dominating. Instead, it faded away in the 1990s. What happened to Digital Equipment Corporation, or DEC?

There’s a short answer and a long answer.

Dave Farquhar

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Commodore 64 models

Dave Farquhar Retro Computing June 12, 2017October 19, 20181541, 1980s, Aldi, amiga, apple, apple ii, atari, Australia, CES, commodore, commodore 64, compaq, IBM, infoworld, intel, Japan, MOS, nintendo, Personal Computer, public domain

Over the course of its 12 years on the market, Commodore released a number of Commodore 64 models. The computer’s capability changed very little over time, but the technology did. The world changed a lot between 1982 and 1994, and that gave Commodore some opportunities to lower costs, chase other market segments, or both.

Here’s an overview of the various Commodore 64 models that hit the market over the machine’s long life.

Dave Farquhar

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