The Silicon Underground

Home » Page 140

Epyx Fast Load commands

Dave Farquhar Retro Computing June 24, 2019June 9, 2019

Epyx’s Fast Load cartridge did more than just speed up disk access. It also added a fair bit of functionality in the form of utilities and additional commands. Here’s a look at the Epyx Fast Load commands and how to use them.

Most Fast Load commands followed the convention of Commodore’s DOS Wedge, but it only implemented a subset of it. The cartridge also contained some simple disk utilities, including copiers, a disk editor, and simple file utilities. Also keep in mind if you use a Fast Load cartridge with a Pi1541, you need to reconfigure your Pi1541.

What are 1 gauge trains?

Dave Farquhar model railroading June 21, 2019September 5, 2019

What are 1 gauge trains? It’s a fair question, since it’s terminology you don’t see every day. And it’s one, as in the number one, not L gauge or I gauge. It’s not the same as O gauge, and it’s terminology that goes all the way back to the 19th century.

German model railroad maker Marklin introduced 1 Gauge, or Gauge 1, in 1891 as the smallest of five train sizes. Its track measures 1.75 inches across and trains marketed using this terminology are usually 1:32 scale.

What does backported mean?

Dave Farquhar Linux June 20, 2019May 31, 2023

This is the question I just can’t shake in my career. Maybe if I answer it in writing, it’ll save me one conversation. What does backported mean, and do I need to be concerned about it?

Backporting is the process of applying bugfixes, especially security fixes, from new software to older, discontinued versions of the same software. This allows businesses to run older software securely while maintaining compatibility that the newer version may lack. This practice is most common on open-source software on Linux systems, so don’t get any ideas about using backporting to make it safe to run Adobe Acrobat 1.0 on Windows 98. That isn’t happening.

LHA file format

Dave Farquhar Retro Computing June 19, 2019June 9, 2019

LHA was a compression algorithm popular in the early 1990s, especially on Amiga computers. It was similar in concept to Zip on PCs, but was slightly more efficient. Amiga software was frequently distributed in LHA file format.

Most modern PC file decompressors, such as 7zip and WinRAR, can extract the LHA file format. If you need to extract an LHA file on an Amiga or an emulator, the most popular LHA utility was called LhA, written by Stefan Boberg.

How to lower your toolbox height

Dave Farquhar DIY June 18, 2019May 27, 2019

If you need to lower your toolbox height so it will fit under a shelf or workbench, you can do it as long as you’re willing to empty and disassemble the toolbox.

Most toolboxes don’t have adjustable casters. But you can swap the casters under your toolbox for smaller ones to gain an inch of clearance, or possibly even two inches.

Printers for vintage computers

Dave Farquhar Retro Computing June 17, 2019August 31, 2022

For many vintage computer enthusiasts, printing is a curiosity. But it can be nice to be able to print from a vintage machine. And there are relatively modern printers that work with vintage computers without the hassle of finding ribbons. The key is to find a laser printer that can emulate older Epson FX-series dot matrix printers. This takes some legwork and some research, but it’s doable.

Some people consider using a modern LCD cheating, but I don’t think using a laser printer is. Laser printers existed in the 1980s. They were just expensive. This means you can team up your vintage computer with a compatible laser printer to build what would have been a dream outfit when your retro computer was new.

What is a narrow gauge railroad?

Dave Farquhar model railroading June 14, 2019June 9, 2019

What is a narrow gauge railroad? If you’re not a train enthusiast, or even if you are, you may be a bit unclear on this term even if you hear it all the time. Let’s talk about narrow gauge, why it exists, and why hobbyists like to model narrow gauge instead of standard gauge trains like the ones you probably see every day.

Narrow gauge railroads are railroads with a narrower track than the standard 4 feet, 8.5 inches. They typically occur in areas where a full-size train is impractical.

Build your own Commodore 64 power supply

Dave Farquhar Retro Computing June 13, 2019May 25, 2019

Hobbyists have been building their own replacement C-64 power supplies for decades. I first talked to someone about it in the mid 1990s, when I was still in college. But no one, to my knowledge, has ever given a step by step build process for a DIY power supply. So I will. Here’s how to build your own Commodore 64 power supply.

All you need to build a DIY C-64 power supply are the two cables you can make or salvage from an original power supply, a 9V transformer, a 5V switching power supply module, a case to put it in, and possibly some bits of wire and wire nuts. The only tools you need are a screwdriver and a multimeter.

Sears vs Stanley Craftsman tools

Dave Farquhar DIY June 12, 2019May 26, 2019

Did you know there are two lines of Craftsman tools? One is controlled by Sears and the other is controlled by Stanley Black and Decker. When it comes to Sears vs Stanley Craftsman tools, there may be a difference, and it’s certainly confusing. Here’s how this confusion came to be.

In March 2017, Sears sold the Craftsman brand name to Stanley Black and Decker while retaining a license to continue to use the name itself until 2032. This is why you can buy Craftsman tools at Sears, yet find different Craftsman tools at other stores.

Amiga chip RAM vs fast RAM vs slow RAM

Dave Farquhar Retro Computing June 11, 2019January 8, 2025

The great thing about Amigas was they had a flat 32-bit memory architecture from day one. Unlike 16-bit DOS PCs, memory was memory–to an extent. Amigas did have three types of memory. So let’s look at Amiga chip RAM vs fast RAM vs slow RAM.

Amiga chip RAM was visible to the CPU as well as the sound and video chips. Fast RAM and slow RAM were not, but fast RAM, which sat higher in the CPU’s address space, could run programs faster than either slow RAM or chip RAM.