This directory contains game-system files.
Files:
00 : Contain one byte “0x15” and all other are zero’s
01 : Field engine
02 : Battle engine
03 : WorldMap engine
04 : TetraMaster engine
05 : ???????? engine
06 : ???????? engine
07-12: ?????????????
13 : Script used to save/load saved game
14-20: ?????????????