| uhOpenGame | Opens the given device special file |
| uhCloseGame | Closes the given file descriptor |
| uhReadGame | Reads n-byte of data from the game and copy it to the memory region beginning at addr specified address. |
| uhWriteGame | Copies n-byte of data from the host (beginning at a specified address) to the game |
| uhReadRamrom | Copies n-byte of data from the ramrom memory beginning with addr |
| uhWriteRamrom | Writes n-byte from data to the ramrom memory beginning with addr |
| uhGLoad | Uses PARTNER to load and execute a 64 game |
| uhPartnerCmd | Issues the various types of commands that can be used with PARTNER |