Acer Extensa 500 Service Guide

Chapter 111
Basic Operation
Indicators
The computer has six easy-to-read status indicators (LEDs) under the display 
screen.
The Power and Standby indicators are visible even when you close the 
display cover so you can see the status of the computer while the cover is 
closed.
#IconFunctionDescription
1 Power Lights when the computer is on.
Blinks when a battery-low condition occurs.
2 Standby Lights when the computer enters Standby 
mode.
3Media 
ActivityLights when the floppy drive, hard disk or...

12
System Introduction 
Keyboard
The keyboard has full-sized keys and an embedded keypad, separate cursor 
keys, two Windows 98 keys and twelve function keys.
Special Keys
Lock Keys
The keyboard has three lock keys which you can toggle on and off.
Lock KeyDescription
Caps Lock When Caps Lock is on, all alphabetic characters typed are in 
uppercase.
Num Lock 
(Fn-F11)When Num Lock is on, the embedded keypad is in numeric 
mode.  The keys function as a calculator (complete with the 
arithmetic operators +,...

Chapter 113
Embedded Numeric Keypad
The embedded numeric keypad functions like a desktop numeric keypad.  It 
is indicated by small characters located on the upper right corner of the 
keycaps.  To simplify the keyboard legend, cursor-control key symbols are not 
printed on the keys. 
Note: 
If an external keyboard or keypad is connected to the computer, 
the numlock feature automatically shifts from the internal 
keyboard to the external keyboard or keypad.
Desired AccessNum Lock OnNum Lock Off
Number...

14
System Introduction 
Windows 98 Keys
The keyboard has two keys that perform Windows 98-specific functions.
KeyDescription
Windows logo key Start button.  Combinations with this key performs 
special functions.  Below are a few examples:

 + Tab (Activate next Taskbar button)

 + E (Explore My Computer)

 + F  (Find Document)

 + M  (Minimize All)
Shift + 

 + M  (Undo Minimize All)

 + R  (Display Run dialog box)
Application key Opens the application’s context menu (same as right-
click). 

Chapter 115
Hot Keys
The computer employs hot keys or key combinations to access most of the 
computer’s controls like screen contrast and brightness, volume output and 
the BIOS setup utility. 
Hot KeyIconFunctionDescription
Fn-F1 Hot key help Displays a list of the hotkeys and 
their functions.
Fn-F2 Setup Accesses the notebook 
configuration utility.  .
Fn-F3 Standby Puts the computer in Standby 
mode.  Press any key to return.
See “System Standby Mode” on 
page 30 to learn more about 
Standby mode....

16
System Introduction 
Fn-F7 Touchpad on/off Turns the internal touchpad on 
and off.
When you connect an external 
PS/2 mouse, the computer 
automatically disables the 
touchpad.
Fn-F8 Speaker on/off Turns the speakers on and off; 
mutes the sound.
Fn-­Contrast up Increases the screen contrast 
(available only for models with 
HPA displays).
Fn-¯Contrast down Decreases the screen contrast 
(available only for models with 
HPA displays).
Fn-®Brightness up Increases the screen brightness.
Fn-
¬Brightness...

Chapter 117
Hardware Configuration and Specification
Memory Address Map
Memory AddressSizeFunction
00000000-0009FFFF 640 KB  Base memory
000A0000-000BFFFF 128 KB Video memory
000C0000-000C9FFF 40 KB Video BIOS
000CA000-000CBFFF 8 KB I/O ROM
000E0000-000FFFFF 128 KB System BIOS
00100000-top limited
  04301000-04301FFF
  04302000-04302FFF
  0430000-04300FFFF--
  4 KB
  4 KB
  64 KBExtended (DIMM) memory
  PCMCIA controller (slot 1)
  PCMCIA controller (slot 2)
  USB controller
FFFF0000-FFFFFFFF 64 KB...

18
System Introduction 
DMA Channel Assignment
DMA ChannelFunction
DRQ0 Audio(optional)
DRQ1 ECP or Audio(optional)
DRQ2 Floppy
DRQ3 ECP(optional)
DRQ4 DMA controller
DRQ5 Not used
DRQ6 Not used
DRQ7 Audio
I/O Address Map
I/O AddressFunction
000-00F DMA controller-1
020-021 Interrupt controller-1
040-043 Timer 1
060, 064 Keyboard controller 8742 chip select
061 System speaker out
040B DMA controller-1
061 System speaker
070-071 Real-time clock and NMI mask
080-08F DMA page register
0A0-0A1 Interrupt...

Chapter 119
3BC-3BE paraller port 1
3B0-3BB
3C0-3DFVideo Controller 
3F0h-3F7 Standard Floppy Disk Controller
3E8-3EF COM3 or LT Win modem(optional)
3F0-3F7 Floppy disk controller
3F8-3FF COM1 or LT Win modem(optional)
480-48F, 4D6  DMA controller-1
4D0-4D1
CF8-CFFPCI configuration register
Processor
ItemSpecification
CPU type Intel Tillamook 233/266 Mhz processor
Tillamook--Intel Pentium architecture, 64 bit data bus, 
16K-Byte code cache, 16 K-Bytes write back data, 
cache, with MMX technology
CPU...

20
System Introduction 
System Memory
ItemSpecification
Memory controller ALi M1531
Onboard memory size 0MB
DIMM socket number 2 sockets (2 banks)
Supports memory size per socket 16/32/64/128 MB
Supports maximum memory size 256MB (128MB x 2)
Supports DIMM type Synchronous DRAM
Supports DIMM Speed 100MHz
Supports DIMM voltage 3.3V
Supports DIMM package 144-pin DIMM
DIMM Combinations
Slot 1Slot 2To t a l  M e m o r y
0 16MB 16MB
0 32MB 32MB
0 64MB 64MB
0 128MB 128MB
16MB 16MB 32MB
16MB 32MB 48MB
16MB 64MB...