kg
—
KL-11/DL-11W line clock
kg0 at uba0 csr 0176500 vector kglock
NOTE: This driver has not been ported from 4.4BSD yet.
A KL-11 or DL-11W can be used as an alternative real time clock
source. When configured, certain system statistics and, optionally, system
profiling work will be collected each time the clock interrupts. For optimum
accuracy in profiling, the DL-11W should be configured to interrupt at the
highest possible priority level. The kg
device
driver automatically calibrates itself to the line clock frequency.
The kg
driver appeared in
4.2BSD.