X-Hacker.org- Ralf Brown's Interrupt List (Part 1,2) - int 31 - dpmi 0.9 api - protected mode

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INT 31 - DPMI 0.9 API - protected mode - SEGMENT TO DESCRIPTOR
        AX = 0002h
        BX = real mode segment
Return: CF set on error
        CF clear if successful
            AX = selector corresponding to real mode segment (64K limit)
Notes:  multiple calls for the same real mode segment return the same selector
        the returned descriptor should never be modified or freed

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