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How to cut foam insulation board cleanly

Dave Farquhar DIY September 2, 2020May 12, 2023

Foam insulation board claims to be easy to cut. It says right on the board, usually. But when someone saw me cutting thick foam boards in the Home Depot parking lot, he said, “You’re a braver soul than me!” In this blog post, I’ll show how to cut foam insulation board with simple and very inexpensive hand tools, and minimal mess. The best way to cut foam board even allows you to cut it right in the parking lot, so the foam will fit in a small SUV.

Thin foam board will cut with just a utility knife, but you can easily cut the thick 2-inch boards, even with just simple hand tools.

Amiga 1080 monitor

Dave Farquhar Retro Computing September 1, 2020September 15, 2025

The Amiga 1080 monitor was the original monitor Commodore supplied with the Amiga 1000 in 1985. It’s one of only two monitors that featured the Amiga branding with the Amiga checkmark logo. Its picture quality is very good, but the monitor sometimes behaves oddly. You can fix the odd behavior. I’ll tell you how, and I also tracked down the elusive pinout for this monitor.

u200b: What it is, and why it messes up your code or data

Dave Farquhar Troubleshooting August 31, 2020September 6, 2023

I was pushing some old data through an API at work when I received a weird error message. The API coughed up a hairball. It responded that I had u200b at position 154, and if I needed that character, I’d have to encode it. But I looked at position 154 and it was a number. Nothing weird. Some APIs render this problem character as u+200b. So what’s u200b, why does a problematic invisible character exist, and how do you clean it up?

U200b is a Unicode non-printing space character. It’s meant to assist typographers in creating page layouts, and it’s extremely useful in certain languages that don’t use the Roman alphabet. But many of us who use the Roman alphabet may go a lifetime without needing it.

Atarisoft: If you can’t beat ’em, join ’em

Dave Farquhar Retro Computing August 27, 2020August 23, 2024

Atarisoft was a short-lived publishing venture from Atari, makers of the iconic 2600 game console and 800/XE/XL line of 8-bit computers. As consumer interest shifted from game consoles to computers, Atari sought to bolster its fortunes by publishing software for those computers. The results were mixed.

Atarisoft allowed Atari to make some short-term profits, but in the long run it may have hurt sales of their own computers. The titles Atarisoft published had been exclusive to Atari systems, so publishing them for other systems robbed Atari of system exclusives.

Are old Tandy computers worth anything?

Dave Farquhar Retro Computing August 26, 2020September 1, 2023

These kinds of blog posts have a way of coming back and biting me, but I’ll write it anyway. Are old Tandy computers worth anything? The answer, of course, is they are. But how much they are worth depends on what the computer is, whether it works, and how complete it is.

Are Westinghouse TVs good?

Dave Farquhar Hardware August 25, 2020May 12, 2023

Westinghouse is an old, respected brand in the United States, and you can find Westinghouse TVs everywhere. But are Westinghouse TVs good? If they aren’t, it’s because Westinghouse TVs aren’t what they seem. Let’s start with who makes Westinghouse TVs.

Westinghouse TVs are made by Tsinghua Tongfang, a Chinese state-owned electronics company. Other brands made by Tsinghua Tongfang include Seiki and Element.

Timex Sinclair 1500: The ZX81 in Spectrum clothing

Dave Farquhar Retro Computing August 24, 2020July 30, 2024

The Timex Sinclair 1500 was Timex’s ill-fated attempt to fix what went wrong with the Timex Sinclair 1000. It was completely compatible with the 1000 and the Sinclair ZX81, but sported 16K of RAM and a better keyboard. These were welcome improvements, but they weren’t enough in the hyper competitive 1983 U.S. computer market.

The Timex Sinclair 1500 was essentially a Sinclair ZX81 with more memory in a Sinclair Spectrum case. Released in July 1983 at a price of $80, it wasn’t successful and Timex withdrew from the market in February 1984.

Trash-80: What it meant and why it stuck

Dave Farquhar Retro Computing August 21, 2020September 20, 2023

One of the first computers I ever used was a Radio Shack Color Computer. Or should we say, a TRS-80 Color Computer. But everyone I knew called them Trash-80s. Why?

Trash-80 was a pejorative for Radio Shack’s TRS-80 line of computers. Tandy executives didn’t like the nickname, but most of its competitors had one too.

GT 710 vs GT 1030

Dave Farquhar Hardware August 20, 2020August 2, 2020

If you need a budget video card, there are probably two cards on your radar: The GT 710 and GT 1030. While the 1030 costs twice as much as the 710, there are advantages and disadvantages to both. The GT 710 vs GT 1030 comes down to a battle for the cheapest card worth having. Here’s how to decide which one is for you.

Both the GT 710 and 1030 are really intended for casual computing. But both of them have their use cases, especially in SFF desktops.

Are police scanners illegal?

Dave Farquhar security August 19, 2020March 13, 2021

I don’t think it’s news to anybody that there’s been some civil unrest in 2020. And in many cases, when protestors have been detained, cops and feds have cited possession of police scanners as proof that they were up to no good. But are police scanners illegal?

Police scanners are not illegal. A police scanner is just a radio, picking up broadcasts on radio waves, which belong to anybody, some of which happen to be used by police. So-called police scanners have uses other than listening to police broadcasts, and listening to police broadcasts is not illegal.