INT 10 - VIDEO - Compaq Extensions - GET EXTENDED ENVIRONMENT AX = BF11h Return: AL = BFh if supported CF clear ES:DI -> ASCII signature "COMPAQ" ES:SI -> advanced functionality table (see #00214) Note: supported by at least the QVision board and the LTE Lite and ProSignia ROM BIOSes SeeAlso: AX=1A00h,AX=BF03h