K 10 svn:author V 7 wollman K 8 svn:date V 27 1996-03-28T20:39:20.000000Z K 7 svn:log V 356 Nit: according to the Harvard code, it is necessary to clear the timestamp counter before loading the performance-monitor control register. I'm not sure I believe this, but we'll follow their lead for the moment. As a result of this commit, the performance-monitoring test program that I wrote now works (the program will find its way to share/examples). END