http://wiki.signature.net/index.php?action=history&feed=atom&title=IB_Statements%2Fsetbit 2026-05-04T20:33:02Z Revision history for this page on the wiki MediaWiki 1.16.0 http://wiki.signature.net/index.php?title=IB_Statements/setbit&diff=413&oldid=prev 2009-05-22T09:43:03Z

<p>New page: &#39;&#39;&#39;SETBIT function&#39;&#39;&#39; &#39;&#39;&#39;Discussion:&#39;&#39;&#39; The SETBIT function sets the specified bit in a string expression. &#39;&#39;&#39;Syntax:&#39;&#39;&#39; Result = SETBIT(string-expression, bit-location, bit-value [...</p> <p><b>New page</b></p><div>'''SETBIT function'''<br /> <br /> '''Discussion:''' The SETBIT function sets the specified bit in a string expression. <br /> <br /> '''Syntax:''' Result = SETBIT(string-expression, bit-location, bit-value [,EXCP=label])<br /> <br /> '''Where:'''<br /> Result contains the value of the bit before it was set. Valid values are 0 and 1.<br /> <br /> String-expression is a string value encoded in binary form.<br /> <br /> Bit-location is a numeric value specifying the bit that is to be set.<br /> <br /> Bits are 0-based and are ordered according to the following scheme:<br /> <br /> If the string-expression contains 8 bits, they are ordered:<br /> <br /> 7 6 5 4 3 2 1 0<br /> <br /> If the string-expression contains 16 bits, they are ordered:<br /> <br /> 7 6 5 4 3 2 1 0 15 14 13 12 11 10 9 8<br /> <br /> If the string-expression contains 24 bits, they are ordered:<br /> <br /> 7 6 5 4 3 2 1 0 15 14 13 12 11 10 9 8 23 22 21 20 19 18 17 16<br /> <br /> Bit-value is 0 or 1.<br /> <br /> An exception occurs if the program attempts to set a bit beyond the declared length of the string-expression. <br /> <br /> '''Example:'''<br /> A$ = “@0000@”<br /> !<br /> B$ = HEXASC(A$)<br /> Print “Before:”;B$<br /> !<br /> FOR I = 8 TO 11<br /> J = SETBIT(A$,I,1,EXCP=9999)<br /> Print “Bit”;I;”was”;J<br /> NEXT I<br /> !<br /> B$ = HEXASC(A$)<br /> Print “After”;B$</div>

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