Sun Microsystems SPARCstation 4, Service Manual

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2-8 SPARCstation 4/Xterminal 1 Service Manual • January 1995
2.5 FORTH-Based PROM Diagnostics
For information about how to run the FORTH Diagnostics, see Appendix D “.
TABLE 2-4
lists specific on-board diagnostic tests for your system.
TABLE 2-4
Selected FORTH Diagnostic Tests
Type of Test Description Preparation When to Use
test screen
Tests the system video graphics
hardware and monitor. The
diag-switch?
NVRAM parameter must be
set to
true
.
See description.
test floppy
Tests the floppy drive response
to commands. Insert a formatted diskette
into the drive. See description. (Does
not apply to the SPARC
Xterminal 1 system.)
test scsi
Tests the SCSI interface logic on
the system board. The
diag-switch?
NVRAM parameter must be
set to
true
.
See description. (Does
not apply to the SPARC
Xterminal 1 system.)
test cdrom
Performs a self-test diagnostic
on the CD-ROM drive. The CD-ROM must be set to
SCSI target 6 and have a CD
inserted in the drive or the
test will fail. See description. (Does
not apply to the SPARC
Xterminal 1 system.)
test net-aui
Performs an internal and an
external loopback test on the
AUI (Thick) Ethernet interface. A cable must be connected
to the system AUI Ethernet
port and to an Ethernet tap
or the test will fail the
external loopback phase. See description.
test net-tpe
Performs an internal and an
external loopback test on the
twisted-pair Ethernet (TPE)
interface. A cable must be connected
to the system TPE port and
to a TPE hub or the test will
fail the external loopback
phase. If the
tpe-link-
test?
parameter is
false
(disabled), the external
loopback test will appear to
pass even if a cable is not
connected.
See description.
test net
Performs an internal and an
external loopback test on the
auto-selected system Ethernet
interface. A cable must be attached to
the system and to an
Ethernet tap or hub or the
external loopback test will
fail. See description.