The ones from the user manual are the only ones available as CAT commands. You can send more commands by reading and writing the EEPROM directly (very risky). Details here:
+ The FT-817's EEPROM is rated for 1 million write operations. Exceed that, and you'll permanently brick your radio, because Yaesu has no replacement EEPROMs.
+ This has been known for many years.
de AA6YQ