182 Technical Reference
Configuration Switches

One header provides eight switches that control various configuration options. Figure 57 shows

the switches.

SW4G1
8
7
6
5
4
3
2
1
Reserved
Recovery Boot
Spare
BIOS Write E n able
Clear CMOS
Password Cl ea r
PHP Override
Reserved

Figure 57. I/O Carrier Configuration Switches

Table 29. I/O Carrier Switch Summary

Items in bold show default placement for each configurable option.

Function Switch
Number Default
Setting What it does at system reset
Reserved 1 Disabled N/A
Recovery Boot 2 Enabled BIOS attempts a recovery boot, loading BIOS code from a
diskette into the flash device. This is typically used when
BIOS code has been corrupted.
Disabled System attempts to boot using BIOS stored in flash memory.
Spare (Reserved) 3 Disabled N/A
BIOS Update 4 Disabled No BIOS flash update allowed.
Enabled Allow BIOS flash update.
CMOS Clear 5 Enabled Replaces the contents of NVRAM with the manufacturing
default settings.
Disabled Preserves the contents of NVRAM.
Password Clear 6 Enabled Clears the current system passwo rd.
Disabled Maintains the password.
PHP Override 7 Disabled N/A
Reserved 8 Disabled N/A