X-Hacker.org- Ralf Brown's Interrupt List (Part 1,2) - int b3 - zipkey

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INT B3 - ZIPKEY - FETCH AN ENTRY FROM A PREVIOUS LOOKUP
        AH = 7Ah
        BL = case number (0 to one less than value returned in BH by lookup)
Return: AL = ZIPKEY state code
        DX = zipcode region (0-999)
        CL = last two digits of first zipcode in the range (0-99)
        CH = last two digits of last zipcode in the range (0-99)
SeeAlso: AH=78h,79h

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