Modules/dos/Settings
From MSX Game Library
Library configuration (msxgl_config.h):
#define DOS_USE_FCB TRUE // Add support for file managment features through FCB structure #define DOS_USE_HANDLE TRUE // Add support for file managment features through file handle #define DOS_USE_UTILITIES TRUE // Add support for file managment features through filename #define DOS_USE_VALIDATOR TRUE // Add support for last error backup and return value validation