tsutsui 79d97d7582 Switch hp300 to timecounter with MC6840 interval timer, which is
used for hardclcok(9). Old code is still left for reference.

XXX: possibly problematic if hardclock(9) is blocked more than 1/HZ,
XXX: but old microtime(9) implementation also had the similar problem.
2006-09-09 19:45:49 +00:00
..