Sun Microsystems Ultra 5, Service Manual

Page: 80 / 258

4-8 Sun Ultra 5 Service Manual • February 2000
4.6 OpenBoot PROM On-Board Diagnostics
The following sections describe the OpenBoot PROM (OBP) on-board diagnostics. To
execute the OBP on-board diagnostics, the system must be at the
ok
prompt. The
OBP on-board diagnostics are described as follows:
■
Section 4.6.1 “Watch-Clock Diagnostic” on page 4-8
■
Section 4.6.2 “Watch-Net and Watch-Net-All Diagnostics” on page 4-8
■
Section 4.6.3 “Probe-IDE Diagnostic” on page 4-10
■
Section 4.6.4 “Test device alias, device path, -All Diagnostic” on page 4-10
4.6.1 Watch-Clock Diagnostic
The watch-clock diagnostic reads a register in the NVRAM/TOD chip and displays
the result as a seconds counter. During normal operation, the seconds counter
repeatedly increments from 0 to 59 until interrupted by pressing any key on the Sun
keyboard. The watch-clock diagnostic is initialized by typing the
watch-clock
command at the
ok
prompt. The following code example identifies
the watch-clock diagnostic output message.
4.6.2 Watch-Net and Watch-Net-All Diagnostics
The watch-net and watch-net-all diagnostics monitor Ethernet packets on the
Ethernet interfaces connected to the system. Good packets received by the system
are indicated by a period (.). Errors such as the framing error and the cyclic
redundancy check (CRC) error are indicated with an “X” and an associated error
description. The watch-net diagnostic is initialized by typing the
watch-net
command at the
ok
prompt and the watch-net-all diagnostic is initialized by typing
CODE EXAMPLE 4-1
Watch-Clock Diagnostic Output Message
ok watch-clock
Watching the 'seconds' register of the real time clock chip.
It should be 'ticking' once a second.
Type any key to stop.
49
ok