This just picks up what Rick told me and specifies some hints
about proper values if -irlen, -ircapture and -irmask.
--- openocd.orig/doc/openocd.texi
+++ openocd/doc/openocd.texi
@@ -1509,9 +1509,12 @@
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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