Acer AC100 Service Manual page 82

Boot from
USB disk
Backplane board
temperature check
PQAF system test
PQAF memory test
PQAF HDD test
Read SN from
DMI data check
End test
6. After the diagnostic routine is completed, the HDD status indicator lights purple indicating the system has
passed all diagnostic tests.
7. A copy of the test result will be saved as a log file (i.e., 66380AC3.LOG) and stored in the Results
folder.The name of the log file is based on the last 8 bytes of the serial number
Device Initialization Manager code checkpoints
The Device Initialization Manager (DIM) module gets control at various times during BIOS POST to initialize
different BUSes. The following table describes the main checkpoints where the DIM module is accessed:
Checkpoint
2A
38
While control is in the different functions, additional checkpoints are output to port 80h as a word value to
identify the routines under execution. The low byte value indicates the main POST Code Checkpoint. The
high byte is divided into two nibbles and contains two fields. The details of the high byte of these checkpoints
are as follows:
HIGH BYTE XY
The upper nibble 'X' indicates the function number that is being executed. 'X' can be from 0 to 7.
0 = func#0, disable all devices on the BUS concerned.
1 = func#1, static devices initialization on the BUS concerned.
2 = func#2, output device initialization on the BUS concerned.
3 = func#3, input device initialization on the BUS concerned.
4 = func#4, IPL device initialization on the BUS concerned.
5 = func#5, general device initialization on the BUS concerned.
6 = func#6, error reporting for the BUS concerned.
7 = func#7, add-on ROM initialization for all BUSes.
8 = func#8, BBS ROM initialization for all BUSes.
76
HDD 0 HDD 1
Initialize different buses and perform the following functions: Reset, Detect, and
Disable (function 0); Static Device Initialization (function 1); Boot Output Device
Initialization (function 2). Function 0 disables all device nodes, PCI devices, and PnP
ISA cards. It also assigns PCI bus numbers. Function 1 initializes all static devices
that include manual configured onboard peripherals, memory and I/O decode
windows in PCI-PCI bridges, and noncompliant PCI devices. Static resources are
also reserved. Function 2 searches for and initializes any PnP, PCI, or AGP video
devices.
Initialize different buses and perform the following functions: Boot Input Device
Initialization (function 3); IPL Device Initialization (function 4); General Device
Initialization (function 5). Function 3 searches for and configures PCI input devices
and detects if system has standard keyboard controller. Function 4 searches for and
configures all PnP and PCI boot devices. Function 5 configures all onboard
peripherals that are set to an automatic configuration and configures all remaining
PnP and PCI devices.
HDD 2 HDD 3 HDD 0
Description
HDD 1 HDD 2 HDD 3
Chapter 6