You should read Part 1 and Part 2 of this series if you haven’t already. A problem with the HUB75 display reared it’s head almost as soon as I started playing about with MQTT: occasionally the screen would flicker, only slightly, but just enough to be noticed. At this stage I was driving the HUB75 pins with my own RP2040… Read more »
It’s been eight months since I last wrote in this blog. To my regular readers, should I happen to have any, I’m really sorry about that. The main reason for the large gap is I had a full time job and therefore had a massively reduced amount of free time. I say had because it’s no longer the case for… Read more »
The bring-up of the keyboard controller board was a protracted affair. The first problem was obtaining an RJ10 cable. When drawing up the schematics for the IO board and the keyboard controller board I had naively assumed that the RJ10 cable I had salvaged from an old telephone was wired straight through with pin 1 connected to pin 1 etc…. Read more »
After writing about building a 68020 computer I feel slightly silly for going back on my word: I have built up a 68008-based computer on breadboard. For one thing going right to a 68020 felt a bit like I’d be missing out; the pleasure is in exploring not the end result. I’d have left out on the other MPUs in… Read more »
After pondering on it for a while I’ve concluded that my projects lack variety. I really enjoyed working on the case for MAXI09. The CAD work was interesting and taught me much, and was not just a means to the end of a case for MAXI09. So much so that I want to do more of it. And I want… Read more »