combining RS232 messages

[Maddy]

I have the following eqpt
a.Gyro with RS232 or RS422 output (NMEA word $HEHDT ...)
b.Log with RS232 output (NMEA word $GPRMC ...)
c.Standard GPS NMEA output
I want to give these to a single computer with only two serial ports.
I want to combine all these signals and feed them to the computer as a
single input.
Thanks
ps I live in India where nautical electronic hardware is hardly
available. So would prefer a software or circuit diagram which can be
made.

 

[BobG]

This sounds like a software problem. Call any US help desk to get a
talented Indian software engineer on the phone.

 

[Maddy]

"Andrew Holme" <andrew@nospam.com> wrote in message news:<d4jffb$ah$1$830fa7b3@news.demon.co.uk>...

Maddy wrote:
I have the following eqpt
a.Gyro with RS232 or RS422 output (NMEA word $HEHDT ...)
b.Log with RS232 output (NMEA word $GPRMC ...)
c.Standard GPS NMEA output
I want to give these to a single computer with only two serial ports.
I want to combine all these signals and feed them to the computer as a
single input.
Thanks
ps I live in India where nautical electronic hardware is hardly
available. So would prefer a software or circuit diagram which can be
made.

Will they be transmitting data simultaneously?

Do you need bi-directional links i.e. does the computer need to send data /
commands to them?

Yes They will be transmitting data simultaneously. The computer does
not need to send any data. Can any other pin apart from pin 2 of the 9
pin serial port be used for receiving data?

 

I saw the GPS multiplexer and it is exactly what I need. The problem is
I dont think I can get it in India. Is any circuit diagram scematic
available whic I can use for makin a simple 2 in 1 out multiplexer?