On Thu, 21 Oct 2010 10:10:56 -0700, Jim Thompson
wrote:

On Thu, 21 Oct 2010 08:13:45 -0500, John Fields
wrote:

Unlabeled gate below....

My 'HC164 has A, B as inputs, which I assumed were your D1, D2 inputs
until I noticed the unlabeled device.

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Sorry about that, it's one of the gates in an HC86.

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JF