In a message dated 97-11-03 14:30:58 EST, you write:

<< 
 Hello everybody
 I'm new on the list and on the PIC world. I have a project and I do not
 know if it is possible to do with a 16C84 (is it the EEPROM ?)
 The idea is to develop a serial multiplexer. That is, to take two serial
 inputs ( 0-5 volts, 4800N81) and to transmit a serial output (0-5 volt
 4800N81). The inputs are NMEA (a serial transmision used on marine
 equipments) and are composed by messages starting on `$`and ending on 'CRLF'
 I need to take messages from the tqo inputs and transmit them alternate on
 the output.
 My first idea is to use a PIC in conjunction with 3 UART. Any help ?
 Thanks in advance ans best regards
 
 LuLa
 ESP-2761
 36º 31' N  6º 16' W
 Cadiz. España >>

Hello!
Do you want to select which device gets the serial data?

You can use a UART (makes software a bit easier) but the 16F84 is more than
capable of bit banging serial (I use 14 16F84s in our machine all talking
over a RS485 serial link)  Microchip web site has app notes on hardware-less
serial.  It would be simple to select which bit you output your serial data
on.

Dave Duley
V.P. DreiTek Inc.
www.dreitek.com