Relay Computer

My journey in constructing an 8 bit relay computer from scratch ... made from of a ton of solder, wires, lights, relays, sweat, tears, swearing and money.

ALU Construction: Arithmetic Card Wire Wrap 2

19 Feb 2014     construction , ALU

I’ve managed to squeeze in a couple more wire wrapping sessions this week so in this post there’s a few photos of progress so far.

Inputs B and C are fully wired in now as is the data bus output. As all the wiring is now complete on the arithmetic 1-bit units I’ve popped the relays in.

ALU Arithmetic Card (close up top) ALU Arithmetic Card ALU Arithmetic Card (with added relays) ALU Arithmetic Card (close up bottom)

The next wire links to add are the control lines which select either the Add or Increment operation and then once that’s done the card should be ready for powering up and testing/debugging.