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ZX81 Mechanical Keyboard

github.com

11–20 of 51 posts

Re: ZX81 Mechanical Keyboard

#11
That is a sweet keyboard.

It is rather better than my homemade one from 1982

https://twitter.com/njcw/status/1368566103933337603

My dad gave me a old keyboard from something and I traced the zx81 PCB to discover how it was wired, then rewired the new keyboard the same.

I connected it by burning a hole in the case with my soldering iron to poke the wires through!

It was a dream compared to the membrane keyboard.

Re: ZX81 Mechanical Keyboard

#12
post #8

This is definitely tidier than the mechanical keyboard I had for my ZX81—build by a friend in the early '80s and purchased by me circa 1994!—which had keycaps which were more or less photocopies of the picture of the keyboard in the manual that had been photocopied and glued onto the keys of some ancient surplus terminal keyboard, with a healthy dose varnish to protect the paper on top and a lot of kludging of the PC…

Somewhat amusingly, the keycaps were the most expensive component ($60 plus shipping), second most expensive being the keyswitches. I really wanted something that captured all the information presented by the original keyboard and also fit on keycaps and am pretty happy with the result.

Re: ZX81 Mechanical Keyboard

#14
post #11

That is a sweet keyboard. It is rather better than my homemade one from 1982 https://twitter.com/njcw/status/1368566103933337603 My dad gave me a old keyboard from something and I traced the zx81 PCB to discover how it was wired, then rewired the new keyboard the same. I connected it by burning a hole in the case with my soldering iron to poke the wires through! It was a dream compared to the membrane keyboard.

What's the keyboard from?

Re: ZX81 Mechanical Keyboard

#15
post #3

Brian's entire ZX81 reproduction project is wonderful: https://chaos.social/@swetland/tagged/zx81

I've had a lot of fun with this project, but want to be clear that the actual "replicate the ZX81 using discrete 74xx logic (like the ZX80) instead of the ULA chip" PCB design is the work of Mahjongg2 who has shared their work here:

https://github.com/mahjongg2/ZX81plus38

https://forums.raspberrypi.com/viewtopic.php?t=254492

https://revspace.nl/ZX81plus38_simple_to_build_ZX-81_clone

Re: ZX81 Mechanical Keyboard

#16
My original, self-assembled a lifetime ago, ZX-81 sits on a shelf next to me as I update insane fleets of processing power on AWS. If I can get past the sentimentality of preserving it, the joy of dropping this keyboard on it might just get me to bring it back to life.

Re: ZX81 Mechanical Keyboard

#17
post #14
post #11

That is a sweet keyboard. It is rather better than my homemade one from 1982 https://twitter.com/njcw/status/1368566103933337603 My dad gave me a old keyboard from something and I traced the zx81 PCB to discover how it was wired, then rewired the new keyboard the same. I connected it by burning a hole in the case with my soldering iron to poke the wires through! It was a dream compared to the membrane keyboard.

What's the keyboard from?

I don't remember I'm afraid. My dad ran a business making keyboards at the time and he was always bringing home keyboards he'd bought to examine.

When he was through examining them I got to play!

Re: ZX81 Mechanical Keyboard

#18
I have one of Davids, it’s a nice keyboard. I also have one of the Memotech keyboards from back in the day - but in 1981 I was “enjoying” the membrane keyboard.

David’s whole website is a ZX81 adventure! https://www.zx81keyboardadventure.com/p/zx-key-support.html https://www.zx81keyboardadventure.com/

Memotech Keyboard: https://www.computinghistory.org.uk/det/36275/Memotech-ZX81-...

Re: ZX81 Mechanical Keyboard

#19
post #17
post #14

Earlier quoted context omitted.

What's the keyboard from?

I don't remember I'm afraid. My dad ran a business making keyboards at the time and he was always bringing home keyboards he'd bought to examine. When he was through examining them I got to play!

Definitely looks to be from a DEC terminal of some kind, based from the switches and layout :D
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