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Sample Circuit: Simple ALU

Posted: Thu Dec 31, 2009 1:59 am
by jflanigan
Here is a circuit for your educational enjoyment. It is based on information that was found at http://library.thinkquest.org/25111/alu.shtml (with some reorganization).

The 1-bit ALU supports the following functions:

0: a AND b
1: a OR b
2: NOT b
3: a PLUS b

The test harness shows how each of the circuits can be used. It also shows how the 1-bit ALU can be ganged to create a 4-bit ALU.

Regards,
John

Re: Sample Circuit: Simple ALU

Posted: Thu Dec 31, 2009 2:50 am
by admin
Nice. Are you planning to upscale it to CPU?

Re: Sample Circuit: Simple ALU

Posted: Thu Dec 31, 2009 3:40 am
by jflanigan
Yes, step by step, learning and stumbling along the way. :)