INT 6F - HP Vectra EX-BIOS - "F_IO_CTRL SF_UNLOCK" - RELEASE SUB-ADDRESSES AX = 0402h BP = driver ID (see #03741) DH,DL = major,minor address (optional) Return: AH = status (see #03744) BP,DS destroyed Desc: release specified sub-addresses from exclusive access Note: this function is documented as present but unsupported in the drivers V_LTABLET, V_LPOINTER, and VLTOUCH SeeAlso: AX=0200h"HP Vectra",AX=0400h"SF_LOCK"