Bits on a Board

The first thing to measure when repairing a retrocomputer is the main oscillator. In a UK101, this is called CLK  and found on U58 pin 3. CL...

Project Euler  is a popular site among enthusiasts of mathematics and programming problems. A very common template for its problems goes som...

 It's relatively easy to test the UK101's discrete TTL chips using a simple Arduino-based IC Tester , and the ROMs can be read by an...

Some time ago, I mentioned that I had been unable to test the various ROMs in the UK101, lacking an EPROM programmer. That has now been rect...

A bodge wire is defined as  a "wire added to a PCB to fix errors in the layout or broken traces." The first is as a result of a de...

It seems like about two years ago, IC testers made quite a splash, judging by reviews of the Retro Chip Tester Pro ( Adrian's Digital B...

Progress? Maybe! Last time, the next planned step was to remove all of the bodges and restore the machine to something resembling a "fa...