LeoCreateLeoManager	Start an N64 Disk Drive game
LeoCJCreateLeoManager	Start a Japanese Game Pak game
LeoCACreateLeoManager	Start an American Game Pak game

Asynchronous Functions
Actual processing is done within a different thread from the one that brought up the function. Also, with this function, processing is done asynchronous to the thread that was brought up.

LeoSpdlMotor	Control the drive's motor and the position of the head
LeoReadWrite	Perform reads and writes from the N64 DD
LeoSeek	Issue the Seek command for the 64DD
LeoReadDiskID	Get the disk ID
LeoReadRTC	Read the time from the RTC
LeoSetRTC	Set the time in RTC

Synchronous Functions
Functions to be processed within the threads brought up

LeoByteToLBA	Convert from byte to LBA
LeoLBAToByte	Convert from LBA into byte
LeoReadCapacity	Calculate the usable disk space
LeoInquiry	Check the version of the N64 Disk Drive hardware and the software.

Font-Use Functions
Functions to get the stored address for font data in the ROM built within the 64DD

LeoGetKAdr	Get the storage offset address for a kanji character specified by the shift-JIS code in the sjis argument
LeoGetAAdr	Get the storage offset address for the ASCII character specified by the character code in the code argument
LeoGetAAdr2	Get the storage offset address for the ASCII character specified by the character information data in the ccode argument

Other Functions
Other Important Functions

LeoReset	Interrupt the command being executed and clear the command queue.
LeoResetClear	Cancel the N64 Disk Drive reset state
LeoClearQueue	Clear the Leo Manager's command queue
LeoBootGame	Executes a reboot

Special Functions
Functions with use limitations and not for general use

LeoModeSelectAsync	Provide a way to alter the wait-time specified for changes between the active,standby, and sleep modes to meet the needs of the game
LeoRezero	Issue the recalibration command to the N64 Disk Drive
LeoTestUnitReady	Check the state of the N64 Disk Drive