INT 2F U - DBLSPACE.BIN - GET ??? ENTRY POINTS
        AX = 4A13h
Return: AX = 134Ah if supported
            ES:BX -> entry point record (see below)
SeeAlso: AX=4A11h/BX=0000h

Format of entry point record:
Offset  Size    Description
 00h    DWORD   pointer to FAR function for ???
 04h  5 BYTEs   FAR JUMP instruction to ???

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