Ricardo Ponte wrote:
>
>        Hi, I really hope that you4re fine.
>
>        I would like to interface a PIC16C73 with a PC vma RS485 or RS422.
>
>        I4ve done this with RS232 but want to change to do something different.
>
>        Can i do this ?
>        What got to do ?
>
>                Ok, bye and thanks for your time


I have interfaced a PIC17c44 with the RS422 serial port of a Macintosh, at
57600 baud, using an LTC490 from Linear Tecnology. The chip is compatible with
both RS422 and RS485. If you have already done with RS232, maybe you can just
replace the driving chip.
If you are interested, I can share the schematics (very simple), and the softwar
e.

Greetings

Leonardo Perretti
l.perretti@isnet.it