Category USB Wombat

Use modern USB keyboards and mice with a vintage Macintosh or Apple II computer. Converts USB to ADB (Apple desktop bus).

Retro USB board in a hand

First Hardware

Retro USB boards are here. They look pretty! And they actually work – minus some small fixes I had to apply. I was in the midst of typing up a description about how my test board didn’t work, and feeling…

Retro USB in Reverse

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…

USB frame timing diagram

RetroUSB Happy Progress

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…

Retro USB prototype on a messy desk

Retro USB – So Close, So Far

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…

USB-to-ADB prototype on a breadboard

USB-to-ADB is not Dead

Long-time readers of this blog may remember a USB-to-ADB converter project that never made it past the concept stage. I wrote a series of posts about it last year, and made some decent progress with ADB emulation and USB host…

PICkit 3 programmer

More USB-to-ADB Planning

This must be a record for the number of times I’ve posted about a project, without actually building the project, or even a half-way working prototype. I’m still fleshing out my ideas for a USB-to-ADB keyboard/mouse adapter for vintage Macintosh…

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