Retro Computing Archives

RIP, Dennis Ritchie

Dave Farquhar Retro Computing October 14, 2011October 13, 20111960s, DEC, intel, mac os x, motorola, os x, unix

Dennis Ritchie died this weekend, aged 70. You may not know who he is, but if you’re reading this, you’re using something he invented.

Dennis Ritchie was, among other things, co-creator of Unix and the C programming language. Even if you run Windows, Windows was heavily influenced by Unix, and a lot of programs you run were written, if not in C, in its successor, C++.
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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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Was CP/M overrated?

Dave Farquhar Retro Computing September 27, 2011October 1, 20181980s, atari, atari st, Bill Gates, commodore, commodore 128, DEC, Gary Kildall, IBM, PIP, unix, vector, windows nt

Veteran tech journalist Dan Tynan recently published a list of 10 overrated technology products, and CP/M was on his list. But was CP/M overrated? I want to dig into that question a bit.

I think everyone knows the story of how IBM almost used CP/M as the operating system for its PC, but ended up using an upstart product from a small company named Microsoft instead. We’ll probably never know exactly what happened, seeing as the author of CP/M is dead and his business partner is no longer able to recollect those events from the 1980 timeframe, and IBM and Bill Gates have no reason to embarrass themselves by revisiting the story.

But CP/M was the first and most popular operating system for early 8-bit computers, so people who used it remember it fondly, and the way Microsoft steamrolled it made Gary Kildall and his operating system folk heroes to underdog lovers everywhere. Even people who never used it and weren’t even born when Kildall’s company ceased to exist have at least a vague idea of what it was.
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Dave Farquhar

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Commodore 128, top-12 dud? By what measure?

Dave Farquhar Retro Computing August 17, 2011September 3, 20181980s, amiga, apple, apple ii, Apple Macintosh, atari, atari 2600, atari st, commodore, commodore 128, commodore 64, Commodore Amiga, IBM, ibm pcjr, macintosh, motorola, NES, nintendo, nintendo nes, pc magazine, video game

PC Magazine presented a list of 12 computer duds, and while I agree with most of them, my old friend the Commodore 128 makes an appearance. Commodore released several duds over the years, but calling the 128 one of them doesn’t seem fair.
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Dave Farquhar

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Happy birthday, IBM PC!

Dave Farquhar Hardware, Retro Computing August 12, 2011August 16, 20181980s, 1990s, amd, apple, apple ii, commodore, commodore 64, compaq, dell, Gary Kildall, hp, IBM, intel, lenovo, macintosh, Maxtor, pc magazine, Personal Computer, radio shack

The IBM PC 5150 turns 30 today.

IBM didn’t invent the personal computer, but if your computer has an Intel or AMD CPU in it, it’s the direct descendant of the beige box IBM unleashed on the world on August 12, 1981. Without a huge amount of effort, it’s even possible to run most of that old software on your shiny new PC. You probably wouldn’t want to, except out of curiosity, but you can do it.

I wasn’t one of the people who rushed out and got one. At the time, I was still watching Sesame Street and Mr. Rogers. I had my first experience with a computer–a Radio Shack TRS-80–in 1982, and the first computer my family bought was a Commodore 64 in 1984. Even in 1984, there were still plenty of people who questioned why anyone needed a computer in their home. My introduction to the IBM PC and PC-DOS didn’t happen until 1987.
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Dave Farquhar

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Floppy disks for Commodore and other vintage computers

Dave Farquhar Retro Computing June 12, 2011September 9, 20181541, 1571, 1980s, apple, atari, commodore, IBM, vintage computer

It’s been many years since 5.25-inch floppy disks suitable for Commodore, Apple, Atari, and other vintage 8-bit computers (not to mention IBM PCs and PC/XTs) have been something you can buy at the store down the street. I found some 360K DS/DD disks on Amazon, but they aren’t available in huge quantities.

Dave Farquhar

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How to find IDE pin 1 and floppy pin 1

Dave Farquhar Hardware, Retro Computing June 5, 2011March 22, 2019

If you mess around with old PCs, you’ll need to know how to find IDE pin 1 and floppy pin 1 on old drives. Sometimes there will be a mark by pin 1. The connector should even be keyed so you can’t insert the connector upside down. Usually it’s one or the other, but sometimes it’s neither.

Typically a red stripe indicates pin 1 on the cable side, and either a silk screened indicator or a square solder joint on the connector side.

Dave Farquhar

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Compress Commodore programs with Exomizer

Dave Farquhar Retro Computing May 30, 2011January 4, 20241541, 1980s, commodore

Exomizer is a compression program for Commodore and other 8-bit computers. The compressed program still runs, but it takes up less space on disk. Decompressing takes some time, but usually less time than reading more data off a 1541 disk. And unlike native packers which sometimes take all night to run, Exomizer runs on modern PCs, so it runs extremely quickly.

The space savings isn’t as much of a consideration now as it was in 1986, but being able to cram as many programs as possible on a single disk image makes access more convenient.

Dave Farquhar

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Apple’s first CEO speaks

Dave Farquhar Retro Computing May 28, 2011November 15, 20181990s, 6502, apple, apple ii, Bill Gates, commodore, IBM, intel, Microsoft Basic, Steve Jobs, Tandy, Texas Instruments, TI

Business Insider has an interview with Apple’s first CEO, Michael Scott. (Not the guy from the TV sitcom.) It’s interesting reading from a historical standpoint.
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Dave Farquhar

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What’s wrong with my 6502 machine language article?

Dave Farquhar Retro Computing, Writing May 25, 2011May 25, 20111990s, 6502, commodore, journalism

It occurred to me this morning that writing about what was wrong with my 6502 machine language article from the early 1990s might be useful. Or maybe that was just whatever the dentist was injecting into the roof of my mouth talking, but I’m going with it.

Should I cut myself some slack on account of my age at the time? Sure. But teenage Dave would have welcomed the critique of mid-30s Dave, if either could find Dr. Emmit Brown’s DeLorean.

Dave Farquhar

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Writing Tight 6502 Series Machine Code

Dave Farquhar Retro Computing May 23, 2011November 29, 20156502, commodore, commodore 128, DEC

This article appeared in the final issue of Twin Cities 128/64, published by Parsec, Inc. of Salem, Mass., sometime after April 1994. Parsec never paid for the article, so under the terms of Parsec’s contract, all rights reverted back to me 30 days after Parsec failed to remit payment.

So now I’m re-asserting my rights to the article. You’ll find the editing poor–all my semicolons appear to have been replaced by commas, for instance–and the writing full of cliches. But I would have been 16 or 17 when I wrote it, and I don’t think it’s a bad effort for a 17-year-old. And the article had some pretty clever tricks. I have to admit I’d forgotten 90% of what was in the article, but I recognize my own writing when I see it.

I’d like to thank Mark R. Brown, former managing editor of INFO magazine, for finding the article and bringing it to my attention. And one final word: Although I wrote this with the Commodore 128 in mind, the same tricks apply to any computer or console based on a 6502 or derivative.

Dave Farquhar

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