System Software Requirements; Main Logic Board Jumpers - Sun Microsystems Ultra 450 Product Notes

System Software Requirements

To run the Solaris™ 2.5.1 operating environment, the Sun Ultra 450 workstation
requires the Solaris 2.5.1 Hardware: 11/97 release. To run the Solaris 2.6 operating
environment, this system requires Solaris 2.6 Hardware: 3/98 or a subsequent
compatible Solaris release. You can verify which version of the operating system is
installed on your Sun Ultra 450 workstation by examining the file /etc/release.
Power Interlock
The Sun Ultra 450 workstation features a power interlock safety mechanism.
Removing either of the system side panels activates the system power interlock
switches. This safety mechanism prevents DC voltages from reaching any internal
component when either side panel is removed and the AC power switch is left on.
Do not remove either side panel while the system is running. Doing so will cause the
system to power off abruptly.

Main Logic Board Jumpers

The following supersedes the information presented on pages 74 and 75 of the
Sun Ultra 450 Workstation Owner's Guide concerning main logic board jumpers:
The clock mode select jumper (J2701) is no longer used on Sun Ultra 450 systems.
No shunt should be installed on jumper J2701. The main logic board is hardwired
to provide the correct clock mode for UltraSPARC II CPU modules.
On page 75, the table describing the settings for the three flash PROM jumpers is
incorrect. The corrected table appears below.
Jumper
J3102
J3103
J5501
2 Sun Ultra 450 Product Notes • June 1998
Shunt on Shunt on
Pins 1 + 2 Selects Pins 2 + 3 Selects
Flash PROM Not To Be Used
Write Protect Write Enable
High Half Booting Normal Booting
Default
Shunt
on Pins Signal Controlled
1 + 2 FLASH PROM SEL
2 + 3 FLASH PROM PROG
ENABLE
2 + 3 XOR LOGIC SET