>WDT off, HS mode, power up disabled. The 16C73A sits some 2 cm above the

I've had problems with it at that kind of distance as well.

Try adding bypass caps to the power supply on adapter board, and moving the
oscillator up there (or at least the caps).

The capacitance of the wiring may be what's killing you.

Andy


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Andy Kunz - Statistical Research, Inc. - Westfield, New Jersey USA
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