While in the recovery mode, there is no screen display on the monitor. The keyboard is disabled as the system automatically recovers the BIOS. The following beep codes describe the recovery status.

Table 68. Beep Codes

Beep Code

2

4

Continuous series of low beeps

Message

Successful completion, no errors.

The system could not boot from the diskette. The diskette may not be bootable.

The wrong BIOS recovery files are being used and/or the flash memory jumper is in the wrong position.

9.Wait for POST to complete and for the message “Press F1 to resume, Press F2 to Setup” to be displayed.

10.Turn off the system, and disconnect all AC power cords from the system.

11.Move the jumper from pins 6 and 7 back to pins 5 and 6.

12.If the baseboard is installed in a system, reinstall the access covers, connect the power cords, and turn on the system for the change to take effect.

13.After running the special recovery mode, run the SSU to specify a new password. See Chapter 3.

Interrupts

The table below recommends the logical interrupt mapping of interrupt sources; it reflects a typical configuration, but a user can change these interrupts. Use the information to determine how to program each interrupt. The actual interrupt map is defined using configuration registers in the OSB4 I/O controller. I/O Redirection Registers in the I/O APIC are provided for each interrupt signal; the signals define hardware interrupt signal characteristics for APIC messages sent to local APIC(s).

✏NOTE

To disable the IDE controller and reuse the interrupt: if you plan to disable the IDE controller to reuse the interrupt for that controller, you must physically unplug the IDE cable from the board connector (IDE0) if a cable is present. Simply disabling the drive by configuring the SSU option does not make the interrupt available.

Table 69. Interrupt Definitions

ISA Interrupt

Description

INTR

Processor interrupt

NMI

NMI to processor

IRQ1

Keyboard interrupt

IRQ3

Serial port A or B interrupt from SIO device, user-configurable

IRQ4

Serial port A or B interrupt from SIO device, user-configurable

continued

Technical Reference

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