also uploaded production files to github:
https://github.com/mahjongg2/ZX81plus38 ... LICENSE.md
more pictures here:
https://revspace.nl/ZX81plus38_simple_t ... s_finished
regarding jumpers, would it be nice to have one switching from the 4k ZX80 ROM to the 8k ZX81 one (and also slow mode)?
(with the 16kbyte ROM both fit at the same time and is a matter of switching just address bit 13)
Also I have found that I made a mistake in the footprint of the RCA connector, if you try to use the RCA connector in the BOM, you will find that the plug points inwards, instead of outwards. This solvable by using a slightly different (more simple) RCA connector, the CLIFF FC68391.
I hope to receive a PCB and some parts soon, so I too can start building a prototype, even though my makerspace is in partial lockdown, and I must be careful with money, as my company has fired me (with lack of work and covid as an excuse). and I have still a couple of years to go before my pension.
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- Joined: Mon Sep 26, 2011 10:56 am
- Location: Looking forward to summer in Somerset, UK...
Sorry to hear that you have been made redundant. I hope you are able to cope and I wish you good luck in the hunt for a good new job.