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INT 21 u - European MSDOS 4.0 - "PBLOCK" - BLOCK A PROCESS
AH = 99h
DS:BX -> memory location to block on
CX = timeout in milliseconds
DH = nonzero if interruptible
Return: CF clear if awakened by event
AX = 0000h
CF set if unusual wakeup
ZF set if timeout, clear if interrupted by signal
AX = nonzero
Desc: suspend calling process until another process sends a "restart" signal
or a timeout occurs
SeeAlso: INT 2F/AX=0802h
See Also:
219A
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