IBM Archives

Home » IBM » Page 2

IBM PS/2 vs PC

Dave Farquhar Retro Computing June 9, 2017May 7, 20241980s, 1990s, apple, apple ii, asus, compaq, IBM, intel, VGA, x86, XT

The IBM PS/2 line was a fairly radical departure from the older IBM PC line. This was deliberate, as IBM wanted to disrupt the clone industry, which it saw as a threat to its business. Here’s a look back at the IBM PS/2 vs PC, the line it replaced.

IBM succeeded with the PC because it created an ecosystem, not just a PC. IBM’s misstep was creating an open architecture and then trying to close it back up after the fact with the PS/2. In IBM’s defense, it’s not clear whether they knew this at the time. If nothing else, in the case of the IBM PS/2 vs PC, IBM created a classic case study of open architecture vs closed.

Dave Farquhar

David Farquhar is a computer security professional, entrepreneur, and author. He has written professionally about computers since 1991, so he was writing about retro computers when they were still new. He has been working in IT professionally since 1994 and has specialized in vulnerability management since 2013. He holds Security+ and CISSP certifications. Today he blogs five times a week, mostly about retro computers and retro gaming covering the time period from 1975 to 2000.

dfarq.homeip.net

Radio Shack computers

Dave Farquhar Retail, Retro Computing May 25, 2017February 5, 20251980s, 1990s, 6502, apple, apple ii, atari, Bill Gates, commodore, commodore 64, compaq, IBM, ibm pcjr, intel, Japan, Missouri, motorola, radio shack, Tandy, tandy 1000

Radio Shack released one of the first home computers, the TRS-80 Model I, in 1977. Between 1977 and 1979, it sold 100,000 units. Radio Shack sold them just as quickly as Tandy could make them. You can count Radio Shack and its parent company Tandy among computer companies that failed, but they enjoyed a good run. For a time, Radio Shack computers, later marketed as Tandy computers, were very popular.

Radio Shack and Tandy computers included the TRS-80 Model I from the inaugural class of 1977, the pioneering Model 100 portable, and the Tandy 1000 series, which helped bring PC clones into homes.

There were several reasons why Radio Shack computers were hard to compete with in the late 1970s and throughout the 1980s.

Dave Farquhar

dfarq.homeip.net

Advantages and disadvantages of Windows NT 3.1

Dave Farquhar Retro Computing May 18, 2017April 7, 20251990s, AIX, amiga, apple, best buy, DEC, hp, IBM, intel, linksys, motorola, Orange Book, proprietary unix, unix, windows nt, Windows XP, wrt54g, x86

I’ve talked a lot about the advantages and disadvantages of old milestone operating systems. But what were the advantages and disadvantages of Windows NT 3.1? That’s a fair question.

Dave Farquhar

dfarq.homeip.net

1541 vs 1541C

Dave Farquhar Retro Computing March 30, 2017October 22, 20221541, 1571, amiga, commodore, IBM

The dark beige/tan Commodore 1541 disk drive is rather well known. The lighter beige, almost white 1541c is more of a curiosity. The drives are closely related, but the difference is more than just the color. Let’s take a look at the 1541 vs 1541c.

Dave Farquhar

dfarq.homeip.net

Convert a list of hostnames to a list of IP addresses

Dave Farquhar security, Windows January 12, 2017December 29, 2017dell, excel, hp, IBM, ips, Roku, vulnerability

I had a client with a huge list of hostnames that they needed to convert to IP addresses so they could scan them. That’s common. I used to have a Windows batch file to convert a list of hostnames to a list of IP addresses, so I dug it out of my archives. This uses ping but isn’t like a ping sweep; they knew the machine names but their tool needed IPs.

I used the file to resolve lists of machines so I could load them into a centralized logging or vulnerability management system. This client had the same need and nobody there had a similar tool. So I shared mine with them. And I present it here so I won’t lose it again, and if you need it, you can use it too.

Dave Farquhar

dfarq.homeip.net

History of overclocking

Dave Farquhar Retro Computing January 11, 2017April 15, 20261980s, 1990s, 6502, amd, amiga, asus, Chuck Peddle, DIY, IBM, intel, motorola, overclocking, pentium ii

Overclocking didn’t start in the 90s, and it wasn’t limited to PCs either. Here’s a history of overclocking from a guy who did it some, and talked to guys who did it a lot in the 80s.

I don’t recommend overclocking, and today Microsoft can prove it’s a bad idea. But overclocking has a long and colorful history. It’s less common than it used to be, perhaps. But it’s not completely extinct.

Dave Farquhar

dfarq.homeip.net

What does scroll lock do? Or scrlk?

Dave Farquhar Retro Computing September 7, 2016August 7, 20181980s, excel, IBM, lenovo

What’s the purpose of the scroll lock key? What does scroll lock do? With modern windowing operating systems we don’t need the scroll lock or scrlk key very often, but it solved a very real problem in the days of DOS.

The scrlk key is an abbreviation for scroll lock. Some keyboards abbreviate it even further. I one keyboard that just says “scr” on that key. However your keyboard abbreviates it, it’s almost always the key in between the print screen and pause keys.

Dave Farquhar

dfarq.homeip.net

Did Microsoft steal DOS from CP/M?

Dave Farquhar Retro Computing August 8, 2016May 3, 2026computer software, Digital Research, Gary Kildall, IBM, intel, Jerry Pournelle, podcast, SCO

Did Microsoft steal DOS from CP/M? There’s $100,000 in it for you if you can prove they did.

Digital forensics consultant Bob Zeidman still says no. I’ve written about him before. But the rumors persist, hence the reward. So how would one go about claiming it?

Start with what we know.

Dave Farquhar

dfarq.homeip.net

New computer, old monitor

Dave Farquhar Hardware May 26, 2016October 5, 20191980s, acer, asus, dell, DisplayPort, hp, IBM, lenovo, VGA

New computer, old monitor: I see questions fairly frequently about using a new computer and older monitor together. More often than not, it’s possible to do, but you may need to know where to look for the cables and adapters you’ll need.

Here’s some help.

Dave Farquhar

dfarq.homeip.net

Commodore 64 vs 64c

Dave Farquhar Retro Computing May 9, 2016June 2, 20241541, 1980s, 1990s, Bil Herd, c64, commodore, commodore 64, IBM, Personal Computer, Tandy, tandy 1000

The Commodore 64 went through a number of revisions throughout its long life. The most outwardly visible of those revisions was the transition from the tan, boxy C-64 to the thinner, lighter-colored 64c. If you’e wondering about the Commodore 64 vs 64c, here’s what you need to know.

Dave Farquhar

dfarq.homeip.net