In this post, I turn a raspberry pi into a virtual storage device for ISA bus computers: Motivation I’m tired of carrying compact flash cards and/or floppies back and forth to my XT computer. I like to do development at my desk using my modern windows PC. While I can certainly use a KVM switch …
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Converting a Seeburg 3WA Wallbox into a Remote for a Modern Music Player
A couple of videos where I take a ~ 1950s Seeburg 3WA wallbox and convert it into a media player for my homebuilt audio player: Motivation I saw a blog post where someone else converted a Seeburg wallbox, and it set me on my own journey. A bit of background. These Wallboxes were used as …
Read More8-bit ISA DiskOnChip / RTC board
In this post, I create an ISA card that can serve as either a DiskOnChip board, or a RTC, or both: Background DiskOnChip is a series of products manufactured by m-systems in the 90s and 2000s. There are several versions available, from standard 32-pin DIP IC packages, to IDE interface versions. This post is going …
Read MoreMeasuring USB Power Cable Voltage Drop with my DC Load
In this video, I measure the voltage drop on USB Power Cables using a Power Supply, DC Load, and Multimeter: Motivation When I did my Seeed Studio Fusion PCB Review, I ordered a new board for my Raspberry Pi Midi Jukebox, that featured a 3.5×1.35 barrel jack for power. I like barrel jacks instead of …
Read MoreLeia’s LED Clock
In this post, I design and build a LED clock for my daughter: Motivation I had been using a Nixie Tube clock in the baby’s room. As the baby grew older, she not only became mobile, but has also picked up a new hobby, smashing things. As such, the nixie clock had to be replaced …
Read MoreBuilding a Micro 8088 Single Board Computer
In this post, I build a Micro 8088, a new XT compatible single board computer designed by Sergey Kiselev Previously I’ve built the RC-2014, Zeta 2, and Xi 8088, so when this new Micro 8088 design form Sergey Kiselev became available, I jumped at the chance to build this one too. In function, the Micro …
Read More8-Bit ISA EMS Board / Flash Disk Board
In this post, I create an 8-bit ISA board that can be used either as expanded memory (EMS) or as a flash disk: Motivation The motivation for this project came from a Boca Start Card that I owned back in the late 80s or early 90s. The Boca Start Card was one of the first …
Read MorePS2-TTLSerial Adapter for RC2014 and MIDI
In this post, I build a PS/2 Keyboard to TTLSerial Adapter Motivation The original reason for this project is that I wanted to build a standalone RC2014 with keyboard and display. There is an official RC2014 serial keyboard, but I find it a little inconvenient for my big fingers and poor eyesight. I have plenty …
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