(...) Thanks Fred. Turned out I had a damaged MAX232 chip on the charger board that was powering up the handyboard via the TXD or RXD line. Once the chip was removed the 1.4V on the handyboard went away. I believe this also damaged the HC11, so now (...) (28 years ago, 2-Jul-96, to lugnet.robotics.handyboard)
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