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From: espen@well.UUCP (Peter Espen)
Newsgroups: net.micro.mac
Subject: A quick question regarding a _Control call in assembly code
Message-ID: <1970@well.UUCP>
Date: Thu, 23-Oct-86 19:42:15 EDT
Article-I.D.: well.1970
Posted: Thu Oct 23 19:42:15 1986
Date-Received: Fri, 24-Oct-86 16:45:25 EDT
References: <709@aaec.OZ> <4183@ut-ngp.UUCP> <1969@well.UUCP>
Organization: Whole Earth Lectronic Link, Sausalito, CA
Lines: 17
Summary: _Control (Trap #$A004) call with CScode set to 6


	I am examining some assembly code that makes does the following...

   204F           ' O'             MOVEA.L A7,A0
   42A8 000C      'B...'           CLR.L   ioCompletion(A0)
   317C FFFD 0018 '1|....'         MOVE    #-3,ioCRefNum(A0)
   317C 0006 001A '1|....'         MOVE    #6,CSCode(A0)
   217C 0002 FFFD '!|....'         MOVE.L  #$2FFFD,CSParam(A0)
   42A8 0020      'B.. '           CLR.L   CSParam+4(A0)
   42A8 0024      'B..$'           CLR.L   CSParam+8(A0)
   A004           '..'             _Control ; (A0|IOPB:ParmBlkPtr):D0\OSErr 

	I cannot find in any of my documantation a description of what a 
_control call with CScode set to 6 does. Can someone out there give me
some help and tell me what this call does?
		Thanks!
		Peter Espen (espen@well)