A blog about a computer made from relays - page 10

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 Design: Function Decoder

This post covers the design of a 3-to-8 Function Decoder which along with the Zero Detect circuit and Condition Registers will all go in to...

20 Nov 2013   —  2 minute read

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ALU Design: 8-bit Arithmetic Unit

In the last post I introduced the design for the 1-bit Arithmetic Unit. This post covers connecting eight of these units together to make an...

17 Nov 2013   —  5 minute read

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ALU Design: 1-bit Arithmetic Unit

This post covers the design of a 1-bit Arithmetic Unit that can add two input bits together (B and C) with carry in and out....

15 Nov 2013   —  3 minute read

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ALU Design: 8-bit Logic Unit

In the last post I introduced the design for a 1-bit Logic Unit. This post covers the design effort to cram 8 of these on...

13 Nov 2013   —  5 minute read

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ALU Design: 1-bit Logic Unit

This post covers the design of a 1-bit Logic Unit that can produce AND, OR, XOR, NOT and SHL (Shift Left) outputs from two input...

11 Nov 2013   —  5 minute read

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Relay Rumination

If there’s one thing a relay computer needs a lot of it’s … erm … relays (of course) … which happens to be a bit...

10 Nov 2013   —  5 minute read

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Instruction Set

In the last post I promised to reveal the planned instruction set for the computer and here it is (pdf file). This should be viewed...

07 Nov 2013   —  1 minute read

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Architectural breakdown: the ALU

In this post I’ll continue to try and explain away the various bits of the architecture that will make up my relay computer project —...

07 Nov 2013   —  4 minute read

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Architectural breakdown: Memory

In this post I’ll continue to try and explain away the various bits of the architecture that will make up my relay computer project —...

06 Nov 2013   —  4 minute read

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