Int 21 Fn 4402  U - Ms-dos 7.0 - Config$ Device - Get Configuration Infor  [D]

   AX = 4402h
   BX = file handle for character device "CONFIG$"
   CX = number of bytes to read (at least 5)
   DS:DX -> buffer for ??? data (see #1131)

Return: CF clear if successful
       AX = number of bytes actually read
   CF set on error
       AX = error code (01h,05h,06h,0Dh) (see #1366 at AH=59h/BX=0000h)

See Also: AX=4403h"CONFIG$"

Format of MS-DOS 7.0 CONFIG$ ??? data:
Offset Size    Description (Table 1131)
 00h   WORD    ??? (0000h)
 02h   WORD    ??? (0000h or value read from IO.SYS segment 70h)
 04h   BYTE    ??? (value read from IO.SYS segment 70h)