I've got a design that someone else gave me, for a PIC16C58B.  It has the 
rs232 serial lines from the db9 connector coming in PIC pins 1 & 2. 
Transmit from the DB9 goes thru a 33k ohm resistor to PIC pin 1, and DB9 
receive is tied directly to PIC pin 2.  DB9 pin 5 is tied to ground.  Comm 
is 19200 baud, no handshaking (3 wires only).  I'd like to add a max232 chip 
to the design.  I've got a max232 chip wired up to it, but can't get it to 
work.  The guy that sells me the (pre-programmed) PIC's says the PIC serial 
pins "are of oppposite logic levels" so the max232 won't work with it.  I've 
got the chip wired up similar to what's shown here:

http://www.boondog.com/tutorials/pic16F84/rs232x.gif

except I have C9 tied to gnd, not VCC.  What am I doing wrong, or will this 
even work without modding the PIC itself?

Thanks
-Mark


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