Logitech G413 repair #2

I said I’d likely do a video of the second G413 repair, and I did exactly that. This second one had an identical fault, just on a different key (the ‘E’ key), and the fix was exactly the same. So despite the comments I read when I was Googling around that it’s the keyswitches themselves that are the problem, this hasn’t been my experience. That’s not to say that people haven’t had issues with the keyswitches – just that I haven’t....

January 6, 2022 · 1 min · 96 words · TassieBob

Ctrl-C (copy) not working in Microsoft Edge?

OK, I admit it, I’m currently using Microsoft Edge as my preferred browser – on both Windows and Linux. Mostly because of the ability to put the browser tabs down the left side of the window, which is particularly useful on wide-screen monitors where there’s no shortage of horizontal real-estate. Chrome has extensions that can sort of do it, but it’s not as clean as the built-in Edge implementation – and Edge is really just Chromium under the hood anyway…...

January 2, 2022 · 1 min · 169 words · TassieBob

The Sheen 100 video sport system

A quick look at the Sheen 100 video sport system from the late 1970’s, including some technical documentation and a brief session playing some of the games with my 15 year old daughter, who had some quite hilarious reactions to it all!

December 30, 2021 · 1 min · 42 words · TassieBob

Logitech G413 key bounce fault

I’ve been using a couple of Logitech G413 keyboards for a while now – one on my work PC, and one on my “use most of the time” home PC’s. At least I was, until they both developed faults. The keyboard on my work PC developed a faulty ENTER key – sometimes it’d be fine and other times I’d get two keypresses instead of the one. That was particularly annoying when answering a prompt where the default was not what I wanted, causing me to have to do “something” again....

December 28, 2021 · 2 min · 364 words · TassieBob


It’s been a couple of weeks since I’ve streamed anything – partly because I’m mulling over the best way forward. Live streaming is great, but it’s hard to concentrate on the task at hand when there’s an audience right there to also engage with – my hat is off to those who can concentrate on both at once! That, and sometimes I’ll hit a road-block and need to research things for a bit (or even wait a week for something to arrive), and that doesn’t make for very engaging content :-)...

June 21, 2021 · 1 min · 212 words · TassieBob

BBC Master 128 repair - part 3

So the current state of play is that IC42 (which was a VC2069) has been replaced with a VC2023 borrowed from a model B. They’re pin compatible (and I believe functionally compatible). I now have: pin 8 – 16Mhz in pin 7 – 8MHz out pin 6 – 4MHz out pin 5 – 2MHz out pin 4 – 1MHz out BUT, the 2MHz out, while it makes it to IC34 pin 2, doesn’t make it to IC28 pin 3, which results in no 1MHZE signal being generated – and that’s used by the VIA’s, they keyboard, and in various other places....

June 16, 2021 · 1 min · 209 words · TassieBob

BBC Master 128 repair - part 2

I’ve been testing with it powered from the bench PSU today (albeit without the -5V, but IIRC that’s only required for audio/serial/cassette). As far as progress, I removed IC42 (destructively – cutting pins) and socketed a spare video ULA – now I’m getting the output clock signals that I’d expect to see, and the CPU is receiving a 2MHz clock. Initially RST was stuck low on pin 40 of the CPU, yet was going high everywhere else (tube socket, cartridge slots, etc)....

June 15, 2021 · 2 min · 397 words · TassieBob

BBC Master 128 repair - part 1

I recently acquired a “may not be working, for parts” BBC Master 128. So I’m not entirely surprised it doesn’t work. Was pretty filthy, and for the most part still is. Battery pack was 3 x Duracell’s that had sweated fairly badly, but not corroded in the normal way they do. That’s been removed (and not replaced yet). Part of the top of the PSU was rusty, and the top of the video modulator is rusty....

June 14, 2021 · 3 min · 438 words · TassieBob

More Z80 build

Most of the IC’s are now in their sockets (on the CPU card at least). Getting close to being able to fire it up – just need the DS1210, and the PLCC adapter so I can do the initial programming of the flash memory. Live streams on Twitch

June 2, 2021 · 1 min · 48 words · TassieBob

Angry Strimmin' PC

A couple of nights back my streaming PC got angry with me. The first night it bluescreened once, but it rebooted and the show went on. The second night, I think Obs crashed once and it bluescreened twice. Initial thoughts were maybe it was a driver or something that I’d installed recently, but that seems less likely now. This morning I created a Memtest86 USB stick and booted into it....

May 31, 2021 · 2 min · 298 words · TassieBob