This Retro USB conversion stuff is getting interesting. Last week I showed off my first working prototype of USB to ADB input conversion. After another week of tinkering, I’ve now got the reverse conversion working as well. I can use…
Behold the Floppy Emu programming board! Normally when you read “programming board” on this web site, you’d think of some circuitry on a PCB, but this time it’s a 3/4 inch thick plank of poplar wood. Ah, that kind of…
This was my 6th *@#&% attempt to assemble some ROM-inator II PCBs using reflow soldering, instead of my normal drag-soldering with an iron. I may not be too bright, but at least I’m persistent. All of the previous attempts failed…
I’ve been investigating ways to handle multiple supplies and consumers of +5V 500mA power in a single project, and it’s surprisingly complicated. My circuit may have up to three simultaneous external connections: a device needing +5V power at “A”, an…
Good news from my RetroUSB project! I finally have a working proof-of-concept, connecting a modern USB keyboard and mouse to a classic 1980s Macintosh SE computer. A microcontroller and small pile of related components perform the necessary conversion between USB…
The mess on my desk is growing. In my attempt to use USB keyboards and mice with an old ADB-equipped Macintosh, I’ve got something that’s tantalizingly close to working. On the ADB side, I can simulate an ADB keyboard and…
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