That's good to know Rich - so the ZX8301 is the more ciritically endangered species then!

Are SuperHermes still available? I see the odd Hermes coming up on retro...

It would support the internal QL-SD, or Tetroid's new external QL-SD fitted externally or internally. That said, I haven't done any work on it in 8 months and I'm not likely to for the near future. I haven't talked with Nasta for a while, and he is central to the project. I really need to send him ...

Given the fact that none of these chips are getting any easier to find, and have some shortcomings - certainly for Zx8301 and driving current monitor technology, I thought I would start a thread based on the possibilities for replacements for the above, not aimed at suggesting an absolute suggestion...

an area where I am completely clue and talent-less: music! So, after all, your planet-sized brain is more similar to Mars than to Jupiter :-) Well, in German there is the word "Fachidiot" (literally "subject idiot", somebody who is very good at one thing and not so good most oth...

you have 2 choices here really - either wire them both as DTE and keep them maie connectors, or wire one as DTE and one as DCE as per the original intention of the QL design, and use Male / Female connectors. DTE - male, and DCE - Female. Since ther is an abundance of both straight through and cross...

I spent too long looking at Car ECU's for friends to identify various components on the boards and do repairs / mods... Eproms are the easier part to identify, but you get a knack for looking at a board and seeing component footprints, connectors, jumper positions - that sort of thing... Useful for ...

From the pictures - 9 pin D's for CTL and SER ports, a single 9v DC in standard power plug, DC-DC converters for 5V and the +/- 12-15V for the serial driver chips, and a composite output on RCA phono as an option rather than UHF regulator. Also seems to be a new LED position off to the back of the b...

As promised, attached is the latest version of the pdf with details of the keyboard, and some corrections and more details on earlier reverse engineering -enjoy

I will post up some more updates this weekend - I have a keyboard map and a few other bits to upload.

Other projects and a 3d printer have taken my time at the moment, so work on the OPD => QLish device have stalled a little.

It does have a couple of mounting lugs on the 64 way edge connector - and room to get a flip over edge connector extender on there - so it would be possible to upgade this with a Trump / Gold / Super Gold probably...