Peter van Hoof wrote:
> Are there any gotcha's you can think of

If you don't have a manual for the original printer, then it may not be easy
at all to figure out the protocol.

The other potential problem I see is that the data rate may be high, at
least for bursts.  Depending on the parallel port type used, the PIC might
not be able to throttle back the rate to somthing it can handle.  The best
defense would be to allow enough local storage of some sort so that the data
sent from the machine can get way ahead of the data actually processed and
sent on by the PIC.  Even if processing is not the bottleneck, you said you
are sending it on as RS-232.  Unless you are using an unusually fast and
non-standard baud rate, the printer port can easily overrun the RS-232 data
rate by an order of magnitude or two.


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