Dell OptiPlex System BIOS, A04

The following problems in the A03 BIOS were corrected to generate the A04 BIOS:

1. ISA Shadow I/O bit in bridges.

2. Prefetchable memory support for devices behind bridge.

3. Make PS/2 mode default for on-board parallel port.

4. LPT Port detection fix.

5. Disable DAC snoop for Oxygen card DAC.

6. Assign Non-VGA I/O to bridge for VGA behind the bridge.

7. Allow user to adjust boot order from FD-PNP-HD to FD-HD-PNP.

8. Fix auto power down possibility at power-up.

9. Force parallel port to allow IRQ to float.

10. Corrected wrong byte order in PCI video ROM class code field.


Version A04, A04



Release date

15 Aug 2000

Last Updated

03 Nov 2011


Available formats

File Format:Hard-Drive
File Name:Gs_A04.exe
Download Type:HTTP
File Size: 122 KB
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.
Not available
Not available
Not available

By downloading, you accept the terms of the Dell Software License Agreement.

Applies to
OptiPlex System BIOS
Warning: Do not turn off your computer or disconnect from your power source while updating the BIOS or you may harm your computer. During the update, your computer will restart and you will briefly see a black screen.

This driver has been tested by both the independent software vendor (ISV) and Dell on the operating systems, graphics cards, and application supported by your device to ensure maximum compatibility and performance. Details

Dell recommends the customer review specifics about the update to determine if it applies to your system. The update contains changes that impact only certain configurations, or provides new features that may/may not apply to your environment.