Month May 2017

Wombat ADB-USB board

Retro USB Firmware Update 0.1.8

Firmware version 0.1.8 is now available from the Retro USB page. This version adds several improvements: 0.1.8 Added support for ISO keyboards, commonly used outside the USA. This should fix the key mapping for the ^ or @ key (the…

USB voltage sag on a logic analyzer

USB Voltage Sag

I received a couple of reports that Retro USB doesn’t work correctly with the Apple Aluminum Keyboard, model A1243 and its smaller sibling A1242. This is Apple’s standard wired USB keyboard, so it’s fairly common. The A1243 has an integrated…

USB keyboard and mouse connected to a Macintosh SE through a Wombat

Retro USB Firmware Update v0.1.5

Firmware version 0.1.5 is now available from the Retro USB page. This version adds a few small improvements: LED A now illuminates when there’s a working ADB or USB connection to the host computer. LED B blinks when there’s keyboard…

Cleaning a PCB with alcohol and a toothbrush

How to Clean a PCB

Lately I’ve been assembling a lot of Retro USB boards, and that’s got me thinking about the best way to clean them after assembly. I use a “no clean” flux for my assembly work, so in theory I don’t have…

Mac ROM-inator II MEGA, front

MEGA, and the Future of ROM-inator II

It’s my pleasure to introduce the Mac ROM-inator II MEGA, with 2x the storage capacity of the original ROM-inator II SIMM. Like the standard ROM-inator II, the MEGA replaces the stock Macintosh II series or SE/30 ROM with a programmable…

Apple IIgs

The Emerging Retrocomputer Industry

While visiting the Bay Area Maker Faire this past weekend, I was struck by something: we’re seeing the emergence of a full-fledged retrocomputer industry. There were at least two retrocomputing-specific businesses exhibiting (GGLABS and Manila Gear), and a couple of…

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