From 4d3b6e4163449a15563299e12cec64759811b658 Mon Sep 17 00:00:00 2001
From: oharboe <oharboe@b42882b7-edfa-0310-969c-e2dbd0fdcd60>
Date: Wed, 18 Feb 2009 09:09:11 +0000
Subject: [PATCH] Holger Schurig <hs4233@mail.mn-solutions.de> incorporate some
 comments from Rick

git-svn-id: svn://svn.berlios.de/openocd/trunk@1376 b42882b7-edfa-0310-969c-e2dbd0fdcd60
---
 doc/openocd.texi | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/doc/openocd.texi b/doc/openocd.texi
index 9f2e82276..6d88d8320 100644
--- a/doc/openocd.texi
+++ b/doc/openocd.texi
@@ -1509,9 +1509,12 @@ Tap Uses:
 parameters'', the required parameters are:
 @comment START REQUIRED
 @itemize @bullet
-@item @b{-irlen NUMBER} - the length in bits of the instruction register
-@item @b{-ircapture NUMBER} - the ID code capture command.
-@item @b{-irmask NUMBER} - the corresponding mask for the ir register.
+@item @b{-irlen NUMBER} - the length in bits of the instruction register, mostly 4 or 5 bits.
+@item @b{-ircapture NUMBER} - the IDCODE capture command, usually 0x01.
+@item @b{-irmask NUMBER} - the corresponding mask for the IR register. For
+some devices, there are bits in the IR that aren't used.  This lets you mask
+them off when doing comparisons.  In general, this should just be all ones for
+the size of the IR.
 @comment END REQUIRED
 @end itemize
 An example of a FOOBAR Tap
-- 
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