On Sun, 8 Dec 1996 20:31:34 +0100, you wrote:

>Hi.
>
>What would be the easiest way to have multiple 16C84's talk to the same
>Max232?
>I don't want to use PortB for this, so open drain configuration as
>described in one of the Parallax Stamp application notes is out of the
>question. At least as far as I can see.
>It is crucial to use only one MAX232.
>
>
>Would this work?

  Maybe, but what about collision detection? If you have 2 processors
running asynchronously they may tx over one another. If you add a
control line between the networked parts, and tie all the outputs
together you can then have all devices configure their output as an
input, and when they want to send they pull the control line high
(nidicating to the other processors that the max232 is now busy),
switch the tx to an output and transmit, then switch back to an input
and bring the control line back low.

  Brian

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