INT 31 P - DPMI 1.0+ - GET DPMI CAPABILITIES
        AX = 0401h
        ES:(E)DI -> 128-byte buffer (see below)
Return: CF clear if successful
            AX = capabilities
                bit 0: paged accessed/dirty supported (see AX=0506h,AX=0507h)
                    1: exceptions restartability supported
                    2: device mapping supported (see AX=0508h)
                    3: conventional memory mapping supported (see AX=0509h)
                    4: demand zero-fill supported
                    5: write-protect client capability supported
                    6: write-protect host capability supported
                    7-15: reserved
            CX = reserved (00h)
            DX = reserved (00h)
            buffer filled
        CF set on error (DPMI 0.9 only)

Format of buffer:
Offset  Size    Description
 00h    BYTE    host major version number
 01h    BYTE    host minor version number
 02h 126 BYTEs  ASCIZ host vendor name