Openboot Prom Jumpers: Cpu Speed Selection; Power Control; Power Switch - Sun Microsystems Sun Blade 100 Service Manual

C.4.2

OpenBoot PROM Jumpers: CPU Speed Selection

When the system is powered on, the CPU clock speed is determined by the default
hardware settings (200MHz) of the MC12429. The OpenBoot PROM firmware will
then need to know the exact CPU speed so that the OpenBoot PROM can reprogram
the MC12429 accordingly through the OpenBoot PROM serial programming
interface. The CPU speeds and jumper settings will be provided in the CPU release
notes.
TABLE C-2
Jumper Settings
All open
1-2 closed
3-4 closed
1-2, 3-4 closed
5-6 closed
1-2, 5-6 closed
3-4, 5-6 closed
1-2, 3-4, 5-6 closed
TABLE C-3
EGPIO[12:11]
00
01
10
10
C.5

Power Control

C.5.1

Power Switch

The Sun Blade 100 system power on/off button is on the front panel.
CPU Speed Jumpers Setting
CPU Speed (MHz)
A (current CPU default)
B
C
D
E
F
G
H
Spare OpenBoot PROM configuration
TBD
TBD
TBD
TBD
TBD
Appendix C Functional Description C-11