[GreenKeys] 8-Level TD?

[Cory Heisterkamp]

Hey Guys,



Looking for some brainstorming here. For the last couple years I’ve been
planning on building a computer entirely out of relays, with minimal
support from vacuum tubes, Dekatrons, etc. But no transistors or IC’s
allowed! I have most of the design worked out and plan on using my ASR33
for the terminal. Life would be so much simpler if the communication were
parallel, but that feels like a bit of a cheat (I see why Flexowriters were
so popular back in the day for computer work). I have a Model 28
Receiving-Selector which was Teletype’s version of a serial-to-parallel
converter. Did they ever make an 8-level version?



My idea is this… Basically, my output buffer holds a byte at a time in 8
relay latches. When ready to send my data out to the world, the holding
magnet of the distributor could release, the distributor would effectively
“sample” the state of each of the 8 latches, and as it returned to the home
position, trips the reset line on the buffer to clear it and it’s ready for
the next byte to be loaded.



The trick is finding an 8-level piece of equipment to start from. Any
thoughts?  -Cory
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