X-Hacker.org- Ralf Brown's Interrupt List (Part 1,2) - int 67 - virtual control program interface

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INT 67 - Virtual Control Program Interface - GET PROTECTED MODE INTERFACE
        AX = DE01h
        ES:DI -> 4K page table buffer
        DS:SI -> three descriptor table entries in GDT
                first becomes code segment descriptor, other two for use by
                main control program
Return: AH = 00h successful
            DI -> first unused page table entry in buffer
            EBX -> protected mode entry point in code segment
        AH = nonzero  failed

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