Int 21 Fn 9A  u - European Ms-dos 4.0 - "prun" - Unblock A Process         [D]

   AH = 9Ah
   DS:BX -> memory location processes may have blocked on

Return: AX = number of processes awakened
   ZF set if no processes awakened
Program: European MS-DOS 4.0 was written for Siemens in Germany and then used
     by several other European OEMs; its release falls between mainstream
     versions 3.2 and 3.3
Desc:  restart all processes waiting for the specified "restart" signal

See Also: AH=99h,INT 2F/AX=0802h