Alternatively, you can generate a 2Hz NMI with external parts but you would have to patch the ROM as there is probably no NMI interrupt vector set.
You can find all the details here:
http://searle.hostei.com/grant/zx80/zx80nmi.html
Michel
on Apr 24, 2013, threeneurons <threeneur...@yahoo.com> wrote:
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That's a beauty ! I've got an old Sinclair ZX80 stashed away. Its the white bodied one that, I think, precedes this one. I'll have to dig it out, and see what I can do with it.--
On Monday, April 22, 2013 12:14:55 AM UTC-7, Michel wrote:After cleaning out the garage a few weeks ago and stumbling across my
good old ZX81 (well, TS1000 really), I thought it would be quite
interesting to turn it into a Nixie Clock!
Here's the result:
http://xiac.com/Images/ZX81NIXIECLOCK.jpg
I designed it with TTL logic, no SMD components here. It is direct
drive using 4 K155ID4 drivers.
If there is enough interest, I will offer this clock as a kit.
Michel
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- [neonixie-l] ZX81 Nixie Clock Michel
- Re: [neonixie-l] ZX81 Nixie Clock Quixotic Nixotic
- [neonixie-l] Re: ZX81 Nixie Clock Michel
- [neonixie-l] Re: ZX81 Nixie Clock J Forbes
- Re: [neonixie-l] ZX81 Nixie Clock Michel van der Meij
- Re: [neonixie-l] Re: ZX81 Nixie Clock Wayne de Geere
- Re: [neonixie-l] Re: ZX81 Nixie Clock Quixotic Nixotic
- [neonixie-l] ZX81 Nixie Clock Oscilloclock
- [neonixie-l] Re: ZX81 Nixie Clock threeneurons
- Re: [neonixie-l] ZX81 Nixie Clock Michel van der Meij
- [neonixie-l] Re: ZX81 Nixie Clock Michel
- [neonixie-l] Re: ZX81 Nixie Clock Michel
- Re: [neonixie-l] Re: ZX81 Nixie ... Dan Harboe Burer
- Re: [neonixie-l] ZX81 Nixie ... Michel van der Meij
- Re: [neonixie-l] ZX81 Nixie ... Michel van der Meij