FHC(4)               OpenBSD Programmer's Manual (SPARC64)              FHC(4)

NAME
     fhc - SPARC64 FireHose controller

SYNOPSIS
     fhc* at central?
     fhc* at mainbus0

DESCRIPTION
     The fhc device provides support for the FireHose controllers found on
     Sunfire, Starfire, and Wildfire UltraSPARC systems.  These devices are
     used for board level functions on these systems.  This device also con-
     trols an LED for each slot.  This LED can be made to blink based on the
     load average on most systems by setting the sysctl(3) variable
     machdep.led_blink to a non-zero value.

HARDWARE
     OpenBSD includes the following fhc drivers, sorted by driver name:

        clkbrd(4)          SPARC64 Clock Board
        clock(4)           Real-time clock
        environ(4)         SPARC64 temperature sensor
        zs/zstty/zskbd(4)  Zilog 8530 (ZSCC) serial communications driver

SEE ALSO
     sysctl(3), central(4), intro(4)

HISTORY
     OpenBSD support for the fhc first appeared in OpenBSD 3.7.

OpenBSD 4.7                    January 18, 2008                              1
