# $ K + Filter Method

This system contains a filtered version of Ralf Brown's Interrupt List. The filter program is Ralf Brown's INTPRINT program.

The Filter File is a simple text file containing include lines, exclude lines, and comment lines.  Include lines start with a plus sign (+) in the first column, followed immediately by the desired string; exclude lines start with a minus sign (-) in the first column, followed immediately by the desired string.  Comment lines start with a hash mark (#) in the first column and are ignored.

Only entries whose title lines contain at least one of the include lines (ignoring uppercase/lowercase distinctions) and none of the exclude lines are processed.

All spaces on include and exclude lines are significant.  Thus,
	+ DOS
will only match entries containing the four-letter sequence " DOS",
while
	+DOS
will match any entries containing the sequence "DOS", whether or not it is preceded by a blank.

See Filter File.