DELL COMPUTER CORPORATION
COPYRIGHT (C) 1988-1995, ALL RIGHTS RESERVED
BIOS RELEASE NOTES
System: Dimension 4xx D
Version: A04
Release Date: 03/28/95
The following change was made in the A03 BIOS to generate the A04 BIOS:
General:
1. Add NOP inbetween 'disable kbd' and 'kbd data read' for
OS/2 I/O trap routine to get inbetween OUT & IN.
2. Fix 101-key KB detection on warm boot.
3. Added optional memory hole feature.
4. Take out turbo mode clock switching...just turn off caches.
PnP functions:
1. Mark BUS node as disableable for Intel's CM.
2. Share PnP IRQ's when no more are available.
3. Add stubs for docking station information call.
4. Add stubs for get event call.
5. Add Cirrus 5429 (PNP0914).
6. Rewrite ISA option ROM scan to handle PnP boot connection vector.
7. Add 2ms delay between assigning resources and configuration
write, to fix Adaptec 1540CP timing problem.
8. Add 2.5ms delay before option ROM scan for Adaptec 1530 cards.
9. Increase resource data byte read timeout to 10 ms: for Madge tokenring.
DELL COMPUTER CORPORATION
COPYRIGHT (C) 1988-1995, ALL RIGHTS RESERVED
BIOS RELEASE NOTES
System: Dimension 4xx D
Version: A03
Release Date: 03/15/95
The following change was made in the A02 BIOS to generate the A03 BIOS:
1. Added 1-wait state to 2nd level cache writes.
DELL COMPUTER CORPORATION
COPYRIGHT (C) 1988-1995, ALL RIGHTS RESERVED
BIOS RELEASE NOTES
System: Dimension 4xx D
Version: A02
Release Date: 02/08/95
The following change was made in the A01 BIOS to generate the A02 BIOS:
1. A problem detecting 101-key keyboards on warm reboots was fixed.
2. Copyrights were changed to 1995.
3. Support for P24D and P24T was added.
4. Disk SETPARMS now uses physical parameters.
DELL COMPUTER CORPORATION
COPYRIGHT (C) 1988-1994, ALL RIGHTS RESERVED
BIOS RELEASE NOTES
System: Dimension 4xx D
Version: A01
Release Date: 11/02/94
The following change was made in the A00 BIOS to generate the A01 BIOS:
1. Added "Plug and Play" support to the BIOS.
DELL COMPUTER CORPORATION
COPYRIGHT (C) 1988-1994, ALL RIGHTS RESERVED
BIOS RELEASE NOTES
System: Dimension 4xx D
Version: A00
Release Date: 06/24/94
This is the initial Dimension 4xx D BIOS release.
Download Driver Pack
After your driver has been downloaded, follow these simple steps to install it.
Expand the archive file (if the download file is in zip or rar format).
If the expanded file has an .exe extension, double click it and follow the installation instructions.
Otherwise, open Device Manager by right-clicking the Start menu and selecting Device Manager.
Find the device and model you want to update in the device list.
Double-click on it to open the Properties dialog box.
From the Properties dialog box, select the Driver tab.
Click the Update Driver button, then follow the instructions.
Very important: You must reboot your system to ensure that any driver updates have taken effect.
For more help, visit our Driver Support section for step-by-step videos on how to install drivers for every file type.