The various model lines of NexStar-powered telescopes each
has its own firmware version history. After reviewing the information
for your model, refer to the "how to" articles at the bottom of this
page for upgrade instructions.
Celestron's web site isn't clear about the firmware upgrade process
(the somewhat incomplete details are in the help files for CFM, HCupdate and
MCupdate), so I've
put together these "how to" articles.