INT 21 U - Qualitas 386MAX v6.01 - SET STATE
        AX = 4403h
        BX = handle for device "386MAX$$"
        CX = number of bytes to copy (up to 5Ah)
        DS:DX -> 386MAX state buffer (see AX=4402h"386MAX")
Return: CF clear if successful
            AX = number of bytes actually written
        CF set on error
            AX = error code (01h,05h,06h,0Dh) (see AH=59h)
Note:   the first byte of the buffer must be either 01h, 02h, or 03h
          (specifying the version of the state record) and the buffer must
          contain CX bytes AFTER the initial byte