HP X Class 500/550MHz, Reference Manual

Page: 35 / 149

Chapter 2 35
System Board
System Board Switches
System Board Switches
The first system board switch is reserved (clock dithering spread spectrum), and the next
four switches set the ratio of processor-frequency to Processor-Local-Bus-Frequency. The
next five switches set the configuration for the Personal Workstation, as summarized in
the table below.
Table 2-1. System Board Configuration Switches
Switch Switch Function Default
1 Off
Reserved - Do not use. (OFF = dithering is enabled, ON = dithering not enabled)
Off
2 - 5 – Bus Frequencies (refer to the table “Bus Frequencies” in this
chapter). –
6
Off
On
Retain or clear the CMOS configuration stored in serial EEPROM:
Retain CMOS configuration.
Clear CMOS and reload default values in Setup.
Off
Off
7
Off
On
Enable or disable User and System Administrator Passwords stored
in EEPROM:
Enable passwords.
Disable/Clear User and System Administrator passwords.
8
Off
On
Keyboard power-on:
Disable keyboard power-on.
Enable keyboard power-on.
On
9
Off
1
On
1. Automatic processor frequency is not yet available. Switch 9 should always be set to ON.
Frequency selection mode:
Enable automatic processor frequency, which is programmed by
MaxiLife.
Enable manual processor frequency. System board switch settings
must be manually programmed.
On
10
Off
On
Boot block:
Disable crisis recovery. Normal operation.
Enable crisis recovery. Recovery boot active
2
.
2. Refer to “BIOS Update Crisis Recovery Procedure” in this chapter.
Off