Full Diagnostic Mode; Abbreviated Diagnostic Mode; Setting Up A Tip Connection To Another Workstation - Sun Microsystems SPARCclassic Service Manual

autoboot is enabled (set to true), the operating system will load. Diagnostic testing
is not run.

Full Diagnostic Mode

Diagnostic mode, is the mode which tests the major hardware system board
components and, if the POST is successful, probes the installed SBus modules.
Diagnostic mode runs if one of these conditions is met:
4 You press and hold the Stop-d keys while you turn the on the power
4 You set the diag-switch? NVRAM parameter to true in the Open Boot PROM
4 You disconnect the keyboard and you set the diag-switch? NVRAM parameter
to true in the Open Boot PROM
Note -
POST detects only major failures.
To view error messages returned by POST, connect a terminal to serial port A or use
a tip connection to another workstation.
If you do not connect a terminal to serial port A or use a tip connection, the screen
will be blank during the POST Diagnostic mode. In this case, use the keyboard LEDs
to display error conditions. See "Status Lights (LEDs) and Indicators" on page 29.

Abbreviated Diagnostic Mode

A brief Power-On Self-Test (POST) is run if you disconnect the keyboard and you set
the diag-switch? NVRAM parameter to false in the Open Boot PROM. The brief
Power-On Self-Test is silent (no progressive test messages are printed out). If an error
or errors occur during the abbreviated Power-On Self-Test, all error messages are
displayed on the TTY or tip window.
Setting Up a tip Connection to Another
Workstation
You can use the serial port on your SPARCstation to connect to another Sun
workstation (either the same type of SPARC system or a different type of Sun
SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual ♦ Revision A, November 1993
24
POST does not perform extensive testing on any system board component.