Acer Travelmate 550 Service Guide
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Chapter 133 Working (G0/S0)❑Individual devices such as the CPU and hard disk may be power managed in this state. S1 Sleeping State ❑CPU Stop Clock ❑VGA Standby, turn off back-light ❑PCMCIA Standby ❑Hard Disk Spin Down motor ❑CD-ROM Spin Down ❑Super I/O Power down S3 Sleeping State ❑CPU set power down ❑VGA Suspend ❑PCMCIA Suspend ❑Audio Suspend ❑Hard Disk Power Down ❑CD-ROM Power Down ❑Super I/O Power Down S4 Sleeping State ❑System Saves all system states and data onto disk prior to power off the whole...
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34Chapter 1 Memory Address Map Memory AddressSizeFunction 00100000h-000F0000h 512 KB System BIOS 000CD000h-000C0000h VGA BIOS 000C0000h-000A0000h 128 KB Video memory (VRAM) 000A0000h-00000000h 640KB Conventional memory 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 38859 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...
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Chapter 135 IRQ10 S3 savage 4 O2Micro CardBus Control slot1 IRQ11 O2Micro CardBus Control slot1 USB Universal Host Control IRQ12 PS/2 Mouse IRQ13 Numeric data processor IRQ14 Primary IDE channel (hard disk) IRQ15 Secondary IDE channel (CD-ROM drive) DMA Channel Assignment DMA ChannelFunction(Hardware) 00 Standard Floppy Disk Controller 01 ECP Printer Port (default) 02 Free 03 Free IRQ Assignment Map Interrupt ChannelFunction(Hardware)
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36Chapter 1
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Chapter 237 BIOS Setup Utility The BIOS Setup Utility is a hardware configuration program built into your computer’s BIOS (Basic Input/ Output System). Your computer is already properly configured and optimized, and you do not need to run this utility. However, if you encounter configuration problems, you may need to run Setup. Please also refer to Chapter 4 Troubleshooting when problem arises. To activate the BIOS Utility, press m mm m during POST (when “Press to enter Setup” message is prompted...
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38Chapter 2 Main The Main screen displays a summary of your computer hardware information, and also includes basic setup parameters. NOTE: The screen above is for reference only. Actual values may differ. The table below describes the parameters in this screen. Settings in boldface are the default and suggested parameter settings.. The items in this screen are important and vital information about your computer. If you experience computer problems and need to contact technical support, this data...
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Chapter 239 System Devices The System Devices screen contains parameters involving your hardware devices. The table below describes the parameters in the screen Settings in boldface are the default and suggested parameter settings. NOTE: VGA takes up a portion of system memory, configurable via the VGA Frame Buffer parameter. For example, if you have 128 MB SDRAM, and you set a VGA Frame Buffer of 16MB, main memory is 11 2 M B . ParameterDescriptionOptions Pointing Device Determines whether or not to...
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40Chapter 2 Security The Security screen contains parameters that help safeguard and protect your computer from unauthorized use. The table below describes the parameters in this screen. Settings in boldface are the default and suggested parameter settings. NOTE: When you are prompted to enter a password, you have three tries before the system halts. Don’t forget your password. If you forget your password, you may have to return your notebook computer to your dealer to reset it. Setting a Password...
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Chapter 241
2.Type a password in the Enter new password field. The password may consist of up to eight alphanumeric
characters (A-Z, a-z, 0-9). Retype the password in the Confirm new password field.
IMPORTANT:Be very careful when typing your password because the characters do not appear on the
screen.
3.Press e.
After setting the password, the computer sets the User Password parameter to “Set”.
4.If desired, you can opt to enable the Password on boot parameter.
5.When you are done,...
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42Chapter 2 Others The Others screen contains various parameter settings. The table below describes the parameters in this screen. Settings in boldface are the default and suggested parameter settings. ParameterDescriptionOptions Low Battery Alarm Determines whether or not the system will alarm when the battery power is low. Enabled or Disabled Panel Close Alarm Determines whether or not the system will alarm when the display cover is closed. Disabled or Enabled System Beep Determines whether or not...