 codice_1 provides access to the memory beyond the first 1 MB of space and thus is required by Windows 9x/Me in order to load the graphical portions of the operating systems.As of MS-DOS 5.0 (1991), codice_1 was introduced and could be used to load the DOS kernel code into the High Memory Area (HMA) to increase the amount of available conventional memory by specifying codice_4 in codice_5.In DR DOS 5.0 (1990) and 6.0 (1991), the driver was named codice_6 rather than codice_1, like the corresponding codice_8 or codice_5 directive codice_10.