Int 69 Fn 4001  - 10net V5.0 - Syssvc.com - ???                            [N]

   AX = 4001h

Return: CF clear
   AX = 0000h
   ES:SI -> ???
Range: INT 60 to INT 7F, selected by configuration

Note:  the signature "SYSV" immediately before the interrupt handler serves
     as the installation check

See Also: AX=4002h
Index: installation check;10NET SYSSVC