Table of Contents
Advertisement
Appendix A
Power-up and Bootstrap
The central processor board (CPU) of the Sun Workstation has a set of ROMs which con-
tain a program generally known as the "monitor". The monitor controls the operation of
the system before the
UNIX
kernel takes control.
The first, second, and third major sec90ns in this appendix cover the startup and bootstrap
functions of the monitor.
Under normal circumstances, the monitor automatically
bootstraps the
UNIX
system after initial power-on; no manual intervention is required.
These sections describe how it does that, and how to "boot" manually when necessary.
The fourth section lists
me~sa.gee
which the monitor and boot program can display. These
should be useful for troubleshooting.
For information on the PROM Monitor commands, fSee the CPU PROM Monitor document
in the Sun
S",tem Internal,
Manual.
A.I. Power-On Self Test Procedures
When system power is first turned on, the monitor runs a quick self-test procedure. The
test can have one of these results:
•
Critical errors are found. The screen remains dark. The error is reported on eight
LEDs on the CPU board in the card cage.
•
No video board is found. The monitor sends its output to serial port 'A' (labelled
"RS-232 AU on Model 100U/150U backpanels, and "SIO-A" on Model 120/170
backpanels). Connect an ASCII terminal to this RS-232 connector. Configure the
terminal for 9600 baud, no parity, one stop bit. Then power on the workstation
again and look for messages on the terminal.
•
Non-critical errors are found. These are reported to the screen, and the system
begins the automatic boot process.
•
No
errors are found. Thil is reported to the screen, and the system begins the
automatic boot process.
A.I.I. Critical Errors from Self Test
Seve!'t problems are reported using the eight miniature LEDs on the CPU board. Depend-
ing on your workstation model, you get at these differently:
Revision H of 12 March 1984
A-I
Advertisement
Chapters
Table of Contents
Troubleshooting
