INT 2F PU - Borland C++ 3.0 DPMILOAD.EXE - FREE DESCRIPTORS FOR MEMORY BLOCK???
        AX = FB42h
        BX = 000Ch
        ES:SI -> memory block info ??? (see AX=FB42h/BX=0002h"3.0")
Return: DX = status???
SeeAlso: AX=FB42h/BX=000Fh

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