Acer Power SC Service Manual page 74

Check Point
35H
4EH
4FH
40H
41H
42H
44H
45H
50H
51H
54H
4CH
58H
59H
64H
5CH
5EH
5AH
5FH
60H
70H
74H
78H
7CH
80H
82H
84H
6CH
88H
90H
93H
94H
96H
A0H
A4H
A2H
A8H
66
PCI pass 0
Scan PnP Devices
Config PnP Devices
Initial PCI (1)
Initial PCI (2)
Initial PCI (3)
Initial PCI (4)
Initial PCI (5)
Initializes video display
NOTE:
If system has any display card, it should be initialized via its I/O ROM or
corresponding initialization program.
Copy F-seg from ROM into shadow RAM
Process VGA shadow region
Check CPU brand, ID and external frequency
1. Displays Acer (or OEM) logo (if necessary)
2. Displays Acer copyright message (if necessary).
3. Displays BIOS serial number.
Hook INT 1CH for Quiet Boot.
Tests keyboard interface
NOTE:
The keyboard LEDs should flash once
Memory test (except the 384K base memory)
Load Pentium Pro CPU update code
Test SM RAM
Enables/Disables USB Function
1. Initializes SRAM cache capacity
2. Enables the cache function
Initializes parallel port(s)
Initializes parallel port(s)
Reset math coprocessor
Check and initialize pointing device
Set security status
Prepare entering SETUP for user pressing CTRL + ALT DEL.
Keyboard device initialization
1. Tests and initializes FDD
2. The FDD LED should flash once and its head should be positioned
1. Sets HDD type and features (i.e. transfer speed, mode,....)
2. Tests HDD controller
Displays POST status
Rehook INT 1CH for Quiet Boot
1. Initializes I/O ROM
2. I/O ROM is an optional extension of the BIOS located on an installed add-on card as
part of the I/O subsystem. POSt detects I/O ROMs and gives them opportunity to
initialize themselves and their hardware environment.
Initializes PCI I/O ROM
Sets time and day
Initializes security features
Initializes setup items
Setup SMI parameters
Description
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Chapter 4