Int 6F Fn 12  - Hp Vectra Ex-bios - "f_ins_freeownds" - Install Values In  [b]

   AH = 12h
   BP = 0012h (driver ID for V_SYSTEM)
   ES:DI -> new CS:IP entry point

Return: AH = status (00h) (see #3415)
   BP,DS destroyed

Note:  on installation, the given entry point will be invoked with an SF_INIT
     call (see AX=0200h"SF_INIT"), which should return the routine's DS
     in BX.  If the SF_INIT call returns with error code FEh, the power-on
     self-test sequence will be called.

See Also: AH=00h"HP Vectra",AH=04h/BP=0012h,AH=0Ch/BP=0012h,AH=14h/BP=0012h

See Also: AH=16h/BP=0012h,AH=18h/BP=0012h