yet another PlayStationPortable Documentation

23 UMD Game Structure

/PSP_GAME
/SYSDIR
/USRDIR

UMD_DATA.BIN

start	end	size	description
`0x00`		`0x0b`	Gamecode (terminated by `0x7c`)
`0x0b`		`0x11`	unique disk id (terminated by `0x7c`)
`0x1c`		`0x05`	number of disk ? (terminated by `0x7c`)
`0x21`		`0x0f`	? (terminated by `0x7c`)

note: the files in this directory resemble the contents of the PBP fileformat (see fileformats section)

contains the 'user' game files which can be different for any game.