February 24, 2006 CLOCK 4 sparc

### NAME

clock, oclock - Clock driver for Sun SPARC computers

### SYNOPSIS

clock0 at mainbus0 # sun4c clock0 at obio0 # sun4m clock0 at obio0 addr 0xf2000000 # sun4/300

ooclock0 at obio0 addr 0xf3000000 # sun4/200 ooclock0 at obio0 addr 0x03000000 # sun4/100

### DESCRIPTION

The clock device contains common timer, clock and eeprom routines for the NetBSD kernel.

All system use the timer interrupt to drive the hard clock. The second interrupt is used to drive statistics clock, except sun4/100 and sun4/200 machines, which don't have a spare timer device.

### HARDWARE

The clock driver provides support for the following chips:

Dallas DS1287A
Intersil 7170
Mostek Mk48T02
Mostek Mk48T08

### SEE ALSO

sparc/timer(4)

### HISTORY

The clock appeared in NetBSD1.0.