
System Overview 1-23
Compaq Confidential – Need to Know Required
Writer: Robert Young Project: DS20E Reference Guide Comments:
Part Number: ER-K8F6W-UA .A01 File Name: b-ch1 System Overview.doc Last Saved On: 10/4/99 1:23 PM
The four diagnostic LEDs are shown at ➍ in Figure 1-11. They light up
during power-up, indicating the internal process of the system and console.
Figure 1-12 shows the LED patterns and system functions.
● indicates the LED is lit/on.
❍ indicates the LED is not lit/off.
In a rackmount system, LED 1 is at the top.
In a pedestal system LED 1 is to the left.
36-49413-03.B01
= On, = Off
LED1
LED2
LED3
LED4
Starting console
Initialized idle PCB
Initializing semaphores
Initializing heap
Setting heap base address
Setting memory low limit
Initializing driver structures
Initializing idle process PID
Initializing file system
Initializing timer data structures
Lowering IPL
Creating dead_eater
Creating poll
Creating timer
Creating powerup
Entering idle loop
Probing I/O
Starting drivers
Figure 1-12. Diagnostic LEDs
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