> So this would be a resistor from pin 10 to +5 ?

> AND gate ->|---
>                |
> +5--/\/1k\/\---------- pin 10 max 232
>                |
> AND gate ->|---


That won't work.
The MAX232 has an internal pullup on the pin and your diodes only
allow a high level through. If both AND outputs are low, the pullup
still takes the pin high.
Turn the diodes around and leave the idle gate high.

Steve.


======================================================
Steve Baldwin                Electronic Product Design
TLA Microsystems Ltd         Microcontroller Specialists
PO Box 15-680, New Lynn      http://www.tla.co.nz
Auckland, New Zealand        ph  +64 9 820-2221
email: steveb@tla.co.nz      fax +64 9 820-1929
======================================================

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