Do not turn off your computer or disconnect from the power source while updating the BIOS as this could harm your computer. During the update, your computer will restart and you may briefly see a black screen.
Before updating, please read the installation instructions and important information noted below.
Dell Latitude C640 System BIOS, A04
AUTO INSTALLED This file was automatically installed as part of a recent update. If you are experiencing any issues, you can manually download and reinstall.Latitude C640 FlashBIOS Version A04
Recommended
Find the best download for your system
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Fixes & Enhancements
Issues Fixed:
1. Fixed issue in which ISA devices could not be manually reconfigured
to use IRQ 10 in Device Manager.
2. Fixed issue in which the system cannot enter Standby with a
Simpletech Flash Card installed in the PCMCIA slot.
3. Fixed problem in which large file transfers using the serial
port may fail.
4. Fixed issue in which some bootable CDs do not boot.
5. Decreased the amount of time required to wake from Standby
under Windows XP.
6. Fixed erratic mouse behavior problem that may occur when using
a USB mouse.
7. Fixed issue in which some external serial port devices attached to
the system may detect a break or framing error when the OS loads.
8. Improved accuracy of the battery discharge rate reported to ACPI for
purposes of battery time remaining calculations.
9. Fixed issue in which the user may need to suspend touchpad and
trackstick use for several seconds before either device will respond.
Enhancements:
1. Replaced < F12 > with < Esc > as the hotkey used to exit the One Time
Boot Menu screen.
2. Improved battery status reporting algorithm to reduce time spent
in SMM when updating the OS battery information.
3. Optimized the thermal management algorithm.
4. Added support for newer revisions of the Pentium 4 processor.
5. Updated the ATI M7 video BIOS to version 006.006.006.008.005.
Read More
1. Fixed issue in which ISA devices could not be manually reconfigured
to use IRQ 10 in Device Manager.
2. Fixed issue in which the system cannot enter Standby with a
Simpletech Flash Card installed in the PCMCIA slot.
3. Fixed problem in which large file transfers using the serial
port may fail.
4. Fixed issue in which some bootable CDs do not boot.
5. Decreased the amount of time required to wake from Standby
under Windows XP.
6. Fixed erratic mouse behavior problem that may occur when using
a USB mouse.
7. Fixed issue in which some external serial port devices attached to
the system may detect a break or framing error when the OS loads.
8. Improved accuracy of the battery discharge rate reported to ACPI for
purposes of battery time remaining calculations.
9. Fixed issue in which the user may need to suspend touchpad and
trackstick use for several seconds before either device will respond.
Enhancements:
1. Replaced < F12 > with < Esc > as the hotkey used to exit the One Time
Boot Menu screen.
2. Improved battery status reporting algorithm to reduce time spent
in SMM when updating the OS battery information.
3. Optimized the thermal management algorithm.
4. Added support for newer revisions of the Pentium 4 processor.
5. Updated the ATI M7 video BIOS to version 006.006.006.008.005.
Version
A04, A04
Release date
12 Nov 2002
Download Type
System BIOS
Category
BIOS
Importance
OptionalDell Technologies recommends reviewing this update to determine if it applies to your system. The update contains changes that impact only certain configurations or provides new features that may or may not apply to your environment.
Available formats
File Format:
ZipPack External
File Name:
C640-A04.exe
File Size:
2.29 MB
This is a large file. Depending on your connection speed, it may take some time to download.
Format Description:
This file contains a compressed (or zipped) set of files. Download the file to a folder on your hard drive, and then run (double-click) it to unzip the set of files. Follow the instructions to complete the installation.
To ensure the integrity of your download, please verify the checksum value.
MD5:
Not available
SHA1:
Not available
SHA-256:
Not available
File Format:
One or more self extracting disk images inside of a self extracting zip
File Name:
A04-C640.exe
File Size:
589 KB
This is a large file. Depending on your connection speed, it may take some time to download.
Format Description:
This file contains a compressed (or zipped) set of files. Download the file to a folder on your hard drive, then double-click it to unzip the set of files. Follow the instructions to complete the installation.
To ensure the integrity of your download, please verify the checksum value.
MD5:
Not available
SHA1:
Not available
SHA-256:
Not available
File Format:
Flash BIOS executable
File Name:
C640_A04.exe
File Size:
387.97 KB
This is a large file. Depending on your connection speed, it may take some time to download.
Format Description:
This file format consists of a BIOS-executable file. To use it, download the file and copy it to a DOS-bootable USB flash drive, then boot the system to the USB flash drive and run the program.
To ensure the integrity of your download, please verify the checksum value.
MD5:
Not available
SHA1:
Not available
SHA-256:
Not available
File Format:
A text file containing customer friendly fixes and enhancements information
File Name:
C640_A04.TXT
File Size:
5.31 KB
This is a large file. Depending on your connection speed, it may take some time to download.
Format Description:
This file format contains plain text which can be viewed with a standard text editor.
To ensure the integrity of your download, please verify the checksum value.
MD5:
Not available
SHA1:
Not available
SHA-256:
Not available
By downloading, you accept the terms of the Dell Software License Agreement.
Applies to
Latitude C640 System BIOS
Installation instructions
Default Instructions for C640_A04.exe:
This file format consists of a BIOS executable file. To use it, download
the file and copy it to a DOS-bootable diskette. With the diskette in the
floppy drive, reboot the system and run the program.
Default Instructions for C640_A04.TXT:
This file format contains plain text which can be viewed with a standard
text editor.
Floppy Disk Boot to Disk for A04-C640.exe
Download
1. Click Download Now, to download the file.
2. When the File Download window appears, click Save (Windows XP users will click Save) this program to disk and click OK. The Save In:
window appears.
3. From the Save In: field, click the down arrow then click to
select Desktop and click Save. The file will download to your desktop.
4. If the Download Complete window appears, click Close. The file
icon appears on your desktop.
Hard Drive Floppy Disk Creation
1. Get 1 blank, formatted floppy disks.
2. Double-click the new icon (it looks like a floppy diskette) on
the desktop. The Self-Extractor window appears.
3. Click Setup. An black MS-DOS window appears with a message
indicating that you need 1 floppy diskettes.
4. Press the [ENTER] key.
A message appears prompting you to insert a blank floppy diskette.
5. Insert a floppy disk into the floppy disk drive.
6. Press the [ENTER] key. A message appears indicating that all
data on the disk will be erased.
7. Press the [y] key and then press the [ENTER] key.
The files are copied to the floppy diskette. If the procedure requires
more than one diskette, repeat steps 5 – 7 until you reach the end of the diskette set.
8. After all the files have been copied to the last floppy disk,
press the [ENTER] key and the MS-DOS window closes.
Install
1. Insert the first (or the only) disk of the set into the Floppy
drive.
2. Click Start, click Shutdown, click Restart, and then click OK.
Windows XP Users need only click restart.
3. Follow the on-screen instructions.
Hard Drive Installation (via WinZip) with Setup.exe File for C640-A04.exe
Download
1.Click Download Now, to download the file.
2.When the File Download window appears, click Save (Windows XP
users will click Save) this program to disk and click OK. The Save In:
window appears.
3.From the Save In: field, click the down arrow then click to
select Desktop and click Save. The file will download to your desktop.
4.If the Download Complete window appears, click Close. The file
icon appears on your desktop.
Install
1.Double-click the new icon on the desktop labeled C640-A04.exe.
2.The Self-Extracting window appears and prompts you to extract or
unzip to C:\DELL\DRIVERS\r52051. Write down this path so the executable (I.e.
Setup.exe) file can be found later.
3.The Self-Extractor window appears.
4.Click OK.
5.After completing the file extraction, if the Self-Extractor
window is still open, close it.
6.Click the Start button and then click Run.
7.Type C:\DELL\DRIVERS\r52051 in the Open textbox and then click OK.
8.Follow the on-screen installation instructions.
Default Instructions for C640_A04.exe:
This file format consists of a BIOS executable file. To use it, download
the file and copy it to a DOS-bootable diskette. With the diskette in the
floppy drive, reboot the system and run the program.
Default Instructions for C640_A04.TXT:
This file format contains plain text which can be viewed with a standard
text editor.
Floppy Disk Boot to Disk for A04-C640.exe
Download
1. Click Download Now, to download the file.
2. When the File Download window appears, click Save (Windows XP users will click Save) this program to disk and click OK. The Save In:
window appears.
3. From the Save In: field, click the down arrow then click to
select Desktop and click Save. The file will download to your desktop.
4. If the Download Complete window appears, click Close. The file
icon appears on your desktop.
Hard Drive Floppy Disk Creation
1. Get 1 blank, formatted floppy disks.
2. Double-click the new icon (it looks like a floppy diskette) on
the desktop. The Self-Extractor window appears.
3. Click Setup. An black MS-DOS window appears with a message
indicating that you need 1 floppy diskettes.
4. Press the [ENTER] key.
A message appears prompting you to insert a blank floppy diskette.
5. Insert a floppy disk into the floppy disk drive.
6. Press the [ENTER] key. A message appears indicating that all
data on the disk will be erased.
7. Press the [y] key and then press the [ENTER] key.
The files are copied to the floppy diskette. If the procedure requires
more than one diskette, repeat steps 5 – 7 until you reach the end of the diskette set.
8. After all the files have been copied to the last floppy disk,
press the [ENTER] key and the MS-DOS window closes.
Install
1. Insert the first (or the only) disk of the set into the Floppy
drive.
2. Click Start, click Shutdown, click Restart, and then click OK.
Windows XP Users need only click restart.
3. Follow the on-screen instructions.
Hard Drive Installation (via WinZip) with Setup.exe File for C640-A04.exe
Download
1.Click Download Now, to download the file.
2.When the File Download window appears, click Save (Windows XP
users will click Save) this program to disk and click OK. The Save In:
window appears.
3.From the Save In: field, click the down arrow then click to
select Desktop and click Save. The file will download to your desktop.
4.If the Download Complete window appears, click Close. The file
icon appears on your desktop.
Install
1.Double-click the new icon on the desktop labeled C640-A04.exe.
2.The Self-Extracting window appears and prompts you to extract or
unzip to C:\DELL\DRIVERS\r52051. Write down this path so the executable (I.e.
Setup.exe) file can be found later.
3.The Self-Extractor window appears.
4.Click OK.
5.After completing the file extraction, if the Self-Extractor
window is still open, close it.
6.Click the Start button and then click Run.
7.Type C:\DELL\DRIVERS\r52051 in the Open textbox and then click OK.
8.Follow the on-screen installation instructions.
Need help with BIOS issues?
Find a solution in Dell's BIOS troubleshooting and usage guide.Drivers help and tutorials
For more downloads go to the Drivers and downloads.
For help on using the information on this page, please visit Driver Help and Tutorials.