The Silicon Underground https://dfarq.homeip.net David L. Farquhar, computer security professional, train hobbyist, and landlord Fri, 15 Jan 2021 02:14:53 +0000 en-US hourly 1 https://i2.wp.com/dfarq.homeip.net/wp-content/uploads/2018/11/cropped-silicon-underground.jpg?fit=32%2C32&ssl=1 The Silicon Underground https://dfarq.homeip.net 32 32 16321610 O27 scale https://dfarq.homeip.net/o27-scale/?utm_source=rss&utm_medium=rss&utm_campaign=o27-scale https://dfarq.homeip.net/o27-scale/#respond Fri, 22 Jan 2021 13:00:08 +0000 https://dfarq.homeip.net/?p=25188 O27 scale is something of a misnomer. If you’re looking for scale fidelity, you won’t find a lot of it in O27, regardless of manufacturer. But there are still some general guidelines you can follow. O27 is the designation for

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IBM PS/Valuepoint https://dfarq.homeip.net/ibm-ps-valuepoint/?utm_source=rss&utm_medium=rss&utm_campaign=ibm-ps-valuepoint https://dfarq.homeip.net/ibm-ps-valuepoint/#respond Thu, 21 Jan 2021 13:00:23 +0000 https://dfarq.homeip.net/?p=25028 The IBM PS/Valuepoint was IBM’s attempt to address public objections to the IBM PS/2 series. Introduced in October 1992, they were the most clone-like IBM business desktops since the IBM PC/AT. As the name suggests, they were designed to be

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City Hospital, St Louis https://dfarq.homeip.net/city-hospital-st-louis/?utm_source=rss&utm_medium=rss&utm_campaign=city-hospital-st-louis https://dfarq.homeip.net/city-hospital-st-louis/#respond Wed, 20 Jan 2021 13:00:48 +0000 https://dfarq.homeip.net/?p=25144 The Old City Hospital in St. Louis operated from 1845 to 1985. The present-day structure dates to 1896. Initially founded to deal with a severe cholera outbreak, the City of St. Louis owned and operated the hospital for nearly a

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Genesis vs SNES: Battle of the 16-bit consoles https://dfarq.homeip.net/genesis-vs-snes/?utm_source=rss&utm_medium=rss&utm_campaign=genesis-vs-snes https://dfarq.homeip.net/genesis-vs-snes/#respond Tue, 19 Jan 2021 13:00:58 +0000 https://dfarq.homeip.net/?p=25256 The Sega Genesis and Nintendo SNES were natural rivals. They weren’t the only 16-bit game consoles of their era, but they ended up being the two most popular. Sega leapfrogged Nintendo with the Genesis, and the SNES was Nintendo’s answer.

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Paint 3D printed models: Here’s how https://dfarq.homeip.net/paint-3d-printed-models-heres-how/?utm_source=rss&utm_medium=rss&utm_campaign=paint-3d-printed-models-heres-how https://dfarq.homeip.net/paint-3d-printed-models-heres-how/#respond Mon, 18 Jan 2021 13:00:00 +0000 https://dfarq.homeip.net/?p=25194 I recently acquired a 3D printed door for my Commodore 1084 monitor. It was missing its original. Of course, it came in white. I can live without an imperfect match, but I want something closer than white. But can you

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S gauge vs O gauge https://dfarq.homeip.net/s-gauge-vs-o-gauge/?utm_source=rss&utm_medium=rss&utm_campaign=s-gauge-vs-o-gauge https://dfarq.homeip.net/s-gauge-vs-o-gauge/#comments Fri, 15 Jan 2021 13:00:42 +0000 https://dfarq.homeip.net/?p=24793 The S gauge vs O gauge rivalry is certainly a natural one. They were the two most popular sizes of electric train immediately after World War II, before HO scale eclipsed both of them in the later half of the

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What is a cold solder joint? https://dfarq.homeip.net/what-is-a-cold-solder-joint/?utm_source=rss&utm_medium=rss&utm_campaign=what-is-a-cold-solder-joint https://dfarq.homeip.net/what-is-a-cold-solder-joint/#respond Thu, 14 Jan 2021 13:00:51 +0000 https://dfarq.homeip.net/?p=25326 Years ago, my monitor broke. Back then we had repair shops for such things. I called one and described the symptoms I was having. “Sounds like it could be a cold solder joint. Bring it in,” he said. But what

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Why did paint have lead in it? https://dfarq.homeip.net/why-did-paint-have-lead-in-it/?utm_source=rss&utm_medium=rss&utm_campaign=why-did-paint-have-lead-in-it https://dfarq.homeip.net/why-did-paint-have-lead-in-it/#comments Wed, 13 Jan 2021 13:00:35 +0000 https://dfarq.homeip.net/?p=24931 Does paint have lead in it? It’s not supposed to anymore, because it’s a serious safety issue. But there was a time when it did, and people might even pay extra for more of it. So why did paint have

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Gaslight Square, St. Louis https://dfarq.homeip.net/gaslight-square-st-louis/?utm_source=rss&utm_medium=rss&utm_campaign=gaslight-square-st-louis https://dfarq.homeip.net/gaslight-square-st-louis/#respond Tue, 12 Jan 2021 13:00:06 +0000 https://dfarq.homeip.net/?p=25286 Gaslight Square was a popular arts and entertainment district in the St. Louis Central West End neighborhood whose heyday ran from the mid 1950s to the mid 1960s. It was a three-block area near the intersection of Olive and Boyle,

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30-30-30 reset https://dfarq.homeip.net/30-30-30-reset/?utm_source=rss&utm_medium=rss&utm_campaign=30-30-30-reset https://dfarq.homeip.net/30-30-30-reset/#respond Mon, 11 Jan 2021 13:00:50 +0000 https://dfarq.homeip.net/?p=25181 If you’re messing around with routers, you’re going to come across the phrase 30-30-30 reset. Often without explanation. Here’s what this reset is and why it works. A 30-30-30 reset is the technique of holding the reset button on a

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