Int 6F Fn 08  - Hp Vectra Ex-bios - "f_ins_xchgrsvd" - Exch Values With R  [b]

   AH = 08h
   BP = 0012h (driver ID for V_SYSTEM)
   DX = new value for DS
   ES:DI -> new CS:IP entry point

Return: AH = status (00h,F6h) (see also #3415)
       00h successful
       BX = vector address used
       DX = old value for DS
       ES:DI -> old CS:IP entry point
   BP,DS destroyed
Desc:  exchange the supplied entry point and DS with the values in the next
     reserved entry in the HP_VECTOR_TABLE

Note:  returns AH=F6h if no more reserved vectors are available

See Also: AH=00h"HP Vectra",AH=04h/BP=0012h,AH=06h/BP=0012h,AH=0Ah/BP=0012h

See Also: AH=0Ch/BP=0012h