Pegasus FMC
 

How can you tell if your Honeywell FMC is a Pegasus or non-Pegasus version.

The Bulfer/Gifford FMC User's Guide is an excellent reference for all things FMC. It lists about 30~40 differences.

Does your CDU have the following keys?

VNAV, ATC, FMC COM, NAV RAD,...?

Of course, there are a myriad of software differences, too.

A good clue would be verify if your box has a single key for VNAV menu or separate keys for CLB/DES entries. At least on the 767

I am sure that there might be other ways, though