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Int 0x10, AH=0xff

10FF INT 10 - TopView - UPDATE SCREEN FROM SHADOW BUFFER
10FF INT 10 - DJ GO32.EXE 80386+ DOS extender - VIDEO EXTENSIONS
10FF INT 10 - VIDEO - Oak VGA BIOS v1.02+ - SET EMULATION
10FF00 INT 10 - CARBON COPY PLUS v5.0 - CHECK IF CC CONNECTED TO CCHELP
10FF01 INT 10 - CARBON COPY PLUS v5.0 - DISCONNECT AND RESET LINE
10FF02 INT 10 - CARBON COPY PLUS v5.0 - GET LAST PHONE NUMBER DIALED