Int 61 Fn 00  - Banyan Vines - Call A Service                              [N]

   AH = 00h
   AL = service ID (1..16)
   other registers vary by service

Return: AX = status (see #2996)
Desc:  Calls an adapter driver or redirector service. The service handler
     pointers are stored at offset 0010h in the code segment of the
     BANV interrupt handler (see #2994).

Note:  Banyan can use any interrupt from 60h through 66h.  The Banyan
     interrupt handler is identified by the string "BANV" in the four
     bytes immediately preceding the interrupt handler

See Also: AH=01h,AH=03h

Format of the BANV code segment (revision 5.53):
Offset Size    Description (Table 2994)
 00h 16    BYTEs   reserved
 10h 16    DWORDs  far pointers to the service handlers (0 = not installed)
 50h   DWORD   far pointer to last called service
 54h   WORD    VINES revision
 56h   DWORD   VINES revision long
 5Ah   WORD    VINES revision (lower bound)
 5Ch   DWORD   VINES revision (lower bound) long
 60h   WORD    VINES revision (upper bound)
 62h   DWORD   VINES revision (upper bound) long
 66h   WORD    end of PCCONFIG area
 68h   WORD    start of PCCONFIG area
 6Ah  4    BYTEs   BANV interrupt identifier ("BANV")
 6Eh  N    BYTEs   BANV interrupt service

See Also: #2995