INT 2F PU - Borland C++ 2.0 DPMILOAD.EXE - FREE MEMORY BLOCK
        AX = FB42h
        BX = 0008h
        CX = bit flags
            bit 2: set if DPMI memory, clear if DOS memory
        DX = selector of DOS memory block
        SI:DI = handle of DPMI memory block
Return: DX = 0000h on error, unchanged if succcessful
Note:   The version of DPMILOAD distributed with BC++ v2.0 identifies itself
          as version 1.000, while the version distributed with BC++ 3.0
          identifies itself as version 1.0; the former is 10864 bytes, the
          latter 22180 bytes.