INT 21 U - Microsoft EMM386.EXE v4.45 - GET MEMORY MANAGER INFORMATION
        AX = 4402h
        BX = file handle for device "EMMXXXX0"
        CX = size of buffer in bytes (varies, see below)
        DS:DX -> buffer for returned data (see below)
                first byte must be set on entry to indicate desired data
Return: CF clear if successful
            buffer filled
        CF set on error
            AX = error code (01h,05h,06h,0Dh) (see AH=59h)
Notes:  an error is returned if the number of bytes to be read does not match
          the number of bytes returned for the specified data item
        this function is part of the interface which allows MS Windows to
          cooperate with memory managers
SeeAlso: AX=4402h/SF=00h,AX=4402h/SF=01h,AX=4402h/SF=02h,INT 67/AX=FFA5h

Format of data buffer:
Offset  Size    Description
 00h    BYTE    (call) function
                03h get ???
                04h get ???
---function 03h---
 00h    WORD    ???
 02h    WORD    ???
---function 04h---
 00h    WORD    segment of UMB containing EMM386 code/data
 02h    WORD    number of paragraphs of EMM386 code/data in UMB
 04h    WORD    ???

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