CHECKING THE OPERATING SYSTEM VERSION
atom smasher atom@suspicious.org

WARNING - - WARNING
This will RESET ALL MEMORY to the factory settings!!! Save all Voice and Performance data BEFORE you try this!!!

Power-up while holding 'UTIL' & 'ENTER'. This will display the version. The latest OS is v1.20.

After checking the version, let the machine 'time-out' and return to a 'normal' operating mode. I've been told that this enters the machine into a diagnostic mode, and that damage could be done to parts of the memory that you DON'T want to mess with.

Check The OS Without Losing User Memory
atom smasher atom@suspicious.org

If you can send a sysex string, you can check the OS version, and not 'clean up' the user memory.

Send the exclusive message:

F0 43 10 18 5A 00 F7

It enters the machine into a test mode, and after it reveals the OS version, it just sits there looking dumb- you'll have to shut it down, then power back up, and the user memory is still intact.

Should I upgrade to the latest OS?
atom smasher atom@suspicious.org

For the most part, all versions run smooth, and there shouldn't be any need to upgrade. I asked YAMAHA about what bugs where fixed in each version of the OS, and I got this official reply. If you find any bugs, feel free to tell YAMAHA (if you can get through to someone who knows what an FS1R is ;) or drop me a line and I'll post it on the Bugs - Wish List page.

If you MUST have the latest OS, it can be upgraded by an authorized service center, for a fee.