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Technical Reference 95
System Recovery and Update Jumpers (J1E1)
Table 14. System Recovery and Update Jumper Options
Option Description
BMC Write
Protect
If pins 2 and 3 are jumpered (default), the BIOS boot block is write-protected. If pins 1
and 2 are jumpered, the boot block is erasable and programmable. WARNING:
Incorrect programming of the boot block will render the system unbootable. With
this option set to its default factory setting, the BMC’s operational code can still be
programmed without moving the jumper.
CMOS Clear If pins 4 and 5 are jumpered (default), preservation of configuration CMOS through
system reset is controlled by the BMC. If pins 5 and 6 are jumpered, CMOS contents
are set to the manufacturing default during system reset.
Password Clear If pins 7 and 8 are jumpered (default), the current system password is maintained
during system reset. If pins 8 and 9 are jumpered, the password is cleared on reset.
Recovery Boot If pins 10 and 11 are jumpered (default) the system will attempt to boot using the BIOS
programmed in the Flash memory. If pins 11 and 12 are jumpered, the BIOS will
attempt a recovery boot, loading BIOS code from a CD-ROM disk into the Flash device.
This feature is typically used when the BIOS code has been corrupted.
DSR/DCD Configuration Jumper (J6A2)
For serial concentrators that require a DCD signal, configure the J6A2 jumper block as shown in
Figure 39.
OM12841
J6A2
Figure 39. J6A2 Jumper Block Configured for DCD Signal
For serial concentrators that require a DSR signal, configure the J6A2 jumper block as shown in
Figure 40.
OM12842
J6A2
Figure 40. J6A2 Jumper Block Configured for DSR Signal (Default)