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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
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