Int 6F/AH=40h/BP=0012h

AH = 40h
BP = 0012h (driver ID of V_SYSTEM)

Return:
AH = status (see #03744)
BX = next free string index
BP,DS destroyed

Desc: Get the next string index available to user programs

See Also: AH=00h"HP Vectra" - AH=42h/BP=0012h - AH=44h/BP=0012h - Category: Vendor-specific BIOS Extensions - Int 6Fh - H