INT 10 U - Doorway - SET BIOS(Basic Input/Output System) A set of standardized calls giving low-level access to the hardware. The BIOS is the lowest software layer above the actual hardware and serves to insulate programs (and operating systems) which use it from the details of accessing the hardware directly./DIRECT REDIRECTION AH = BBh AL = new redirection mode 00h BIOS(Basic Input/Output System) A set of standardized calls giving low-level access to the hardware. The BIOS is the lowest software layer above the actual hardware and serves to insulate programs (and operating systems) which use it from the details of accessing the hardware directly. (hook and redirect INT 10h,etc.) 01h DIRECT (scan video memory for changes) Return: ??? SeeAlso: INT 16/AH=67h"Doorway"