X-Hacker.org- Ralf Brown's Interrupt List (Part 1,2) - int 2f - multiplex - dos 3+ internal

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INT 2F - Multiplex - DOS 3+ internal - CHECKSUM MEMORY
        AX = 121Ch
        DS:SI -> start of memory to checksum
        CX = number of bytes
        DX = initial checksum
        SS = DOS CS
Return: AX, CX destroyed
        DX = checksum
        DS:SI -> first byte after checksummed range
SeeAlso: AX=121Dh

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