memory
PMFJI : I don't know the MBX 1200 but most memory boards I have installed
have had jumpers that you set to tell the board how much RAM you have
added. They are usually little rectangular things that fit over pairs of
pins on the circuit board. Try looking at the instructions for your MBX
1200 and see if you need to do this.
Peter Wade
Autopiloting from London, England