INT 10 - VIDEO - TANDY 2000 only - SCROLL LEFT PART OR ALL OF SCREEN AH = 73h AL = number of columns to shift scroll area, 00h to clear entire area BH = new attributes for blanked columns at right CH,CL = row, column of upper left corner of scroll area DH,DL = row, column of lower right corner of scroll area Return: nothing SeeAlso: AH=06h,AH=07h,AH=72h"TANDY",INT 15/AH=12h/BH=05h