Inside Macintosh: Devices /

Chapter 7 - Serial Driver / Serial Driver Reference

Serial Driver Routines /

SerSetBrk

You can use the SerSetBrk function to assert a break signal.

FUNCTION SerSetBrk (refNum: Integer): OSErr;

refNum

The driver reference number of the serial output driver.

DESCRIPTION

The SerSetBrk function forces the output data line into the space state. To form a break signal, the line must be left in this state longer than a character frame.

ASSEMBLY-LANGUAGE INFORMATION

The SerSetBrk function is equivalent to a Device Manager control request with a csCode value of 12.

RESULT CODES

noErr

0

No error

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