Supermicro 440LX User manual

®
SUPER
440LX Chipset
AMI BIOS
REFERENCE MANUAL
Revision 1.1

The information in this User’s Manual has been carefully reviewed and is believed to be
accurate. The vendor assumes no responsibility for any inaccuracies that may be
contained in this document, makes no commitment to update or to keep current the
information in this manual, or to notify any person or organization of the updates.
The manufacturer reserves the right to make changes to the product described in this
manual at any time and without notice. This product, including software, if any, and
documentation may not, in whole or in part, be copied, photocopied, reproduced, translated
or reduced to any medium or machine without prior written consent.
IN NO EVENT WILL THE MANUFACTURER BE LIABLE FOR DIRECT, INDIRECT,
SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING FROM THE USE OR
INABILITY TO USE THIS PRODUCT OR DOCUMENTATION, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGES. IN PARTICULAR, THE VENDOR SHALL NOT HAVE
LIABILITY FOR ANY HARDWARE, SOFTWARE, OR DATA STORED OR USED WITH THE
PRODUCT, INCLUDING THE COSTS OF THE REPAIRING, REPLACING, OR
RECOVERING SUCH HARDWARE, SOFTWARE, OR DATA.
Copyright © 1998 by SUPERMICRO COMPUTER INC.
All rights reserved.
Printed in the United States of America.
Unless you request and receive written permission from the manufacturer, you may not
copy any part of this document.
All products and company names mentioned are trademarks or registered trademarks of
their respective holders.
Do not upgrade the BIOS unless you are notified to do so. Please call technical
support first before upgrading the boot-block BIOS.
SUPER BBS # [phone] (24 hours)
Baud Rate: 1200-14400 bps, Data Bits: 8, Stop Bit: 1, Parity: None

Table of Contents
Chapter 1: AMI BIOS
1-1 Introduction
System BIOS ....................................................................................... 1-1
Configuration Data............................................................................. 1-1
How Data Is Configured................................................................... 1-1
POST Memory Test ............................................................................ 1-1
1-2 BIOS Features...................................................................................... 1-2
BIOS Configuration Summary Screen ........................................... 1-3
AMIBIOS Setup ..................................................................................... 1-3
Chapter 2: Running Setup
2-1 Setup
2-1-1 Standard Setup.................................................................. 2-1
2-1-2 Advanced Setup................................................................. 2-4
2-1-3 Chipset Setup .................................................................... 2-7
2-1-4 Power Management........................................................ 2-13
2-1-5 PCI/PnP Setup ................................................................. 2-15
2-1-6 Peripheral Setup ............................................................. 2-18
2-2 Security Setup
2-2-1 Supervisor/User................................................................ 2-20
2-2-2 Anti-Virus ........................................................................... 2-21
2-3 Utility Setup
2-3-1 Language........................................................................... 2-21
2-3-2 Detect IDE.......................................................................... 2-21
2-4 Default Setting
2-4-1 Optimal Default................................................................. 2-22
2-4-2 Fail-Safe Default............................................................... 2-22
BIOS User's Manual
iii

Table of Contents
iv
Appendix A: BIOS Error Beep Codes...................... A-1
Appendix B: AMI BIOS POST Diagnostic Error
Messages........................................... B-1

PRINTED IN U.S.A.

Chapter 1: AMI BIOS
1-1
Chapter 1
AMI BIOS
1-1 Introduction
This chapter describes the AMIBIOS for the Intel 440FX/440LX
chipset which is designed for Intel Pentium® Pro 150/166/180/200
MHz and Pentium II 233/266/300 MHz processors. The AMI ROM
BIOS is stored in the Flash EEPROM and is easily upgraded
using a floppy disk-based program.
System BIOS
The BIOS is the basic input output system used in all IBM®PC,
XT™, AT®, and PS/2®compatible computers. The WinBIOS is a
high-quality example of a system BIOS.
Configuration Data
AT-compatible systems, also called ISA (Industry Standard Archi-
tecture) must have a place to store system information when the
computer is turned off. The original IBM AT had 64 bytes of non-
volatile memory storage in CMOS RAM. All AT-compatible sys-
tems have at least 64 bytes of CMOS RAM, which is usually part
of the Real Time Clock. Many systems have 128 bytes of CMOS
RAM.
How Data Is Configured
AMIBIOS provides a Setup utility in ROM that is accessed by
pressing <Del> at the appropriate time during system boot. Setup
configures data in CMOS RAM.
POST Memory Test
Normally, the only visible POST routine is the memory test. The
screen that appears when the system is powered on is shown on
the next page.
An AMIBIOS Identification string is displayed at the left bottom
corner of the screen, below the copyright message.

BIOS User's Manual
1-2
Made in U.S.A. Mainboard Rev 1.3
BIOS Release 120497
xxxxx KB OK
Hit <DEL> if you want to run SETUP
(C) American Megatrends Inc.,
XX-XXXX-XXXXXX-XXXXXXXX-XXXXXX-XXXX-X
1-2 BIOS Features
•supports Plug and Play V1.0A and DMI 2.0
•supports Intel PCI 2.1 (Peripheral Component Interconnect)
local bus specification
•supports EDO (Extended Data Out), ECC and FPM DRAM
•supports ECC (Error Checking and Correction)
•supports Flash ROM
AMIBIOS supports the LS120 drive made by Matsushita-Kotobuki
Electronics Industries Ltd. The LS120:
•can be used as a boot device
•is accessible as the next available floppy drive
AMIBIOS supports the National Semiconductor LM75 and LM78
data acquisition chips. When a failure occurs in a monitored
activity, AMIBIOS can sound an alarm and display a message.
The LM75 and LM78 chips monitor:
•CPU temperature
•additional temperature sensors

Chapter 1: AMI BIOS
1-3
•chassis intrusion detector input
•watchdog comparison of all monitored values
•POST code storage RAM
•ISA and I2C serial bus interfaces
•up to five positive voltage inputs
•up to two negative voltage inputs
•up to three fan speed monitoring inputs
BIOS Configuration Summary Screen
AMIBIOS displays a screen that looks similar to the following
when the POST routines complete successfully.
AMIBIOS System Configuration (C) 1985-1994 American Megatrends Inc.,
Main Processor : Pentium(tm) II Base Memory Size : 640 KB
Math Processor : Built-In Ext. Memory Size : 31744 KB
Floppy Drive A: : 1.2 MB, 5¼ Display Type : VGA/EGA
Floppy Drive B: : 1.44 MB, 3½ Serial Port(s) : 3F8,2F8
AMI-BIOS Date : 7/15/95 Parallel Port(s) : 378
Processor Clock : 200MHz Power Management : APM, SMI
AMIBIOS Setup
See the following page for examples of the AMIBIOS Setup
screen, featuring options and settings. Figure 1-1 shows the
Standard option highlighted. To highlight other options, use the
arrow keys, or use the tab key to move to other option boxes.
Figure 1-2 shows the settings for the Standard setup. Settings
can be viewed by highlighting a desired option and pressing
<Enter>. Use the arrow keys to choose a setting. Note: Optimal
settings for all options can be set automatically. Go to the
Optimal icon in the default box and press <Enter>. Use the
arrow keys to highlight yes, then press <Enter>.

BIOS User's Manual
1-4
Figure 1-1. Standard Option Highlighted
Figure 1-2. Settings for Standard Option

Chapter 2: Running Setup
2-1
Chapter 2
Running Setup*
*Optimal and Fail-Safe default settings are bolded in text unless
otherwise noted.
The WinBIOS Setup options described in this section are selected
by choosing the appropriate high-level icon from the Standard Setup
screen. All displayed icons are described in this section, although
the screen display is often all you need to understand how to set
the option.
2-1 Setup
2-1-1 Standard Setup
Pri Master
Pri Slave
Sec Master
Sec Slave
Choose these icons to configure the hard disk drive. When you
click on an icon, the following parameters are listed: Type, LBA/
Large Mode, Block Mode, 32Bit Mode, and PIO Mode. All param-
eters relate to IDE drives except Type.
If the hard disk drive to be configured is an IDE drive, select the
appropriate drive icon, choose the Type parameter and select
Auto. The BIOS will automatically detect the IDE drive parameters
and display them. Click on the OK button to accept these param-
eters.
Click on LBA/Large Mode and choose On to enable support for
IDE drives with capacities greater than 528MB. Click on Block
Mode and choose On to support IDE drives that use Block Mode.
Click on 32Bit Mode and click on On to support IDE drives that
permit 32-bit accesses.
To configure an old MFM hard disk drive, you must know the drive
parameters (number of heads, number of cylinders, number of
sectors, the starting write precompensation cylinder, and drive
capacity). Select the hard disk drive type (1-46). Refer to table
below.

2-2
BIOS User's Manual
AMI BIOS Hard Disk Drive Types
Type Cylinders Heads Write Landing Sectors Size
Precompensation Zone
1306 4128 305 17 10 MB
2615 4300 615 17 20 MB
3615 6300 615 17 31 MB
4940 8512 940 17 62 MB
5940 6512 940 17 47 MB
6615 465535 615 17 20 MB
7462 8256 511 17 31 MB
8733 565535 733 17 30 MB
9900 15 65535 901 17 112 MB
10 820 365535 820 17 20 MB
11 855 565535 855 17 35 MB
12 855 765535 855 17 50 MB
13 306 8128 319 17 20 MB
14 733 765535 733 17 43 MB
16 612 4 0 663 17 20 MB
17 977 5300 977 17 41 MB
18 977 765535 977 17 57 MB
19 1024 7512 1023 17 60 MB
20 733 5300 732 17 30 MB
21 733 7300 732 17 43 MB
22 733 5300 733 17 30 MB
23 306 4 0 336 17 10 MB
24 925 7 0 925 17 54 MB
25 925 965535 925 17 69 MB
26 754 7754 754 17 44 MB
27 754 11 65535 754 17 69 MB
28 699 7256 699 17 41 MB
29 823 10 65535 823 17 68 MB
30 918 7918 918 17 53 MB
31 1024 11 65535 1024 17 94 MB
32 1024 15 65535 1024 17 128 MB
33 1024 51024 1024 17 43 MB
34 612 2128 612 17 10 MB
35 1024 965535 1024 17 77 MB
36 1024 8512 1024 17 68 MB
37 615 8128 615 17 41 MB
38 987 3987 987 17 25 MB
39 987 7987 987 17 57 MB
40 820 6820 820 17 41 MB
41 977 5977 977 17 41 MB
42 981 5981 981 17 41 MB
43 830 7512 831 17 48 MB
44 830 10 65535 830 17 69 MB
45 917 15 65535 918 17 114 MB
46 1224 15 65535 1223 17 152 MB
47 ENTERPARAMETERSPROVIDEDWITHHARDDRIVE

Chapter 2: Running Setup
2-3
Entering Drive Parameters
You can also enter the hard disk drive parameters. The drive
parameters are:
Parameter Description
Type The number for a drive with certain identification parameters.
Cylinders The number of cylinders in the disk drive.
Heads The number of heads.
Write The size of a sector gets progressively smaller as the track
Precompensation diameter diminishes. Yet each sector must still hold 512 bytes.
Write precompensation circuitry on the hard disk compensates for
the physical difference in sector size by boosting the write
current for sectors on inner tracks. This parameter is the track
number where write precompensation begins.
Landing Zone This number is the cylinder location where the heads will normally
park when the system is shut down.
Sectors The number of sectors per track. MFM drives have 17 sectors
per track. RLL drives have 26 sectors per track. ESDI drives
have 34 sectors per track. SCSI and IDE drive may have even
more sectors per track.
Capacity The formatted capacity of the drive is (Number of heads) x
(Number of cylinders) x (Number of sectors per track) x (512
bytes per sector)
Date and Time Configuration
Select the Standard option. Select the Date/Time icon. The
current values for each category are displayed. Enter new values
through the keyboard.
Floppy A
Floppy B
Choose the Floppy Drive A or B icon to specify the floppy drive
type. The settings are Not Installed,360 KB 5¼ inch, 1.2 MB 5¼
inch, 720 KB 3½ inch, 1.44 MB 3½ inch or 2.88 MB 3½ inch.

2-4
BIOS User's Manual
2-1-2 Advanced Setup
Quick Boot
Set this option to Enabled to permit AMIBIOS to boot within 5
seconds. The Settings are Disabled or Enabled.
Pri Master ARMD Emulated as
Pri Slave ARMD Emulated as
Sec Master ARMD Emulated as
Sec Slave ARMD Emulated as
Options for Pri Master ARMD Emulated as, Pri Slave ARMD
Emulated as, Sec Master ARMD Emulated as and Sec Slave
ARMD Emulated as are Auto, Floppy and Hard disk.
1st Boot Device
2nd Boot Device
3rd Boot Device
4th Boot Device
The options for 1st Boot Device are 3rd IDE-HDD, 4th IDE-HDD,
Floppy, ARMD-FDD, ARMD-HDD, ATAPI CD ROM, SCSI or Net-
work. The options for 2nd Boot Device are 1st IDE-HDD, 2nd
IDE-HDD, 3rd IDE-HDD, 4th IDE-HDD, Floppy, ARMD-FDD,
ARMD-HDD or ATAPI. The options for 3rd Boot Device are 1st
IDE-HDD, 2nd IDE-HDD, 3rd IDE-HDD, 4th IDE-HDD, Floppy,
ARMD-FDD, ARMD-HDD or ATAPI CD ROM. The options for the
4th Boot Device are Disabled, 1st IDE-HDD, 2nd IDE-HDD, 3rd
IDE-HDD, 4th IDE-HDD, Floppy, ARMD-FDD, ARMD-HDD. The
Disabled option in the 4th boot device means that setup will not
be considered during the boot process.
1st IDE-HDD, 2nd IDE-HDD, 3rd IDE-HDD and 4th IDE-HDD are
the four hard disks than can be installed by the BIOS. 1st IDE-
HDD is the first hard disk installed by the BIOS, 2nd IDE-HDD is
the second hard disk, and so on. For example, if the system has
a hard disk connected to Primary Slave and another hard disk to
Secondary Master, then 1st IDE-HDD will be referred to as the
hard disk connected to Primary Slave and 2nd IDE-HDD will be
referred to as the hard disk connected to the Secondary Master.
3rd IDE-HDD and 4th IDE-HDD are not present. Note that the
order of the initialization of the devices connected to the primary
and secondary channels are Primary Master first, Primary Slave
second, Secondary Master third, and Secondary Slave fourth.

Chapter 2: Running Setup
2-5
The BIOS will attempt to read the boot record from 1st, 2nd, 3rd
and 4th boot device in the selected order until it is successful in
reading the booting record. The BIOS will not attempt to boot
from any device which is not selected as the boot device.
Try Other Boot Device
This option controls the action of the BIOS if all the selected boot
devices failed to boot. The settings for this option are Yes or No.
If Yes is selected and all the selected boot devices failed to boot,
the BIOS will try to boot from the other boot devices (in a pre-
defined sequence) which are present but not selected as boot
devices in the setup (and hence not yet been tried for booting). If
selected as No and all selected boot devices failed to boot, the
BIOS will try not to boot from the other boot devices which may be
present but not selected as boot devices in setup.
Initial Display Mode
This option determines the display screen with which the POST is
going to start the display. The settings for this option are BIOS or
Silent. If selected as BIOS, the POST will start with the normal
sign-on message screen. If Silent is selected, the POST will start
with the silent screen.
Display Mode at Add-on ROM Init
This option determines the display mode during add-on ROM
(except Video add-on ROM) initialization. The settings for this
option are Force BIOS or Keep Current. If selected as Force
BIOS, the POST will force the display to be changed to BIOS
mode before giving control to any add-on ROM. If no add-on ROM
is found, then the current display mode will remain unchanged
even if this setup question is selected as Force BIOS. If selected
as Keep Current, then the current display mode will remain
unchanged.
Floppy Access Control
The settings for this option are Read-Write or Read-Only.
Hard Disk Access Control
The settings for this option are Read-Write or Read-Only.
S.M.A.R.T. for Hard Disks
S.M.A.R.T. (Self-Monitoring, Analysis and Reporting Technology) is
a technology developed to manage the reliability of the hard disk

2-6
BIOS User's Manual
by predicting future device failures. The hard disk needs to be
S.M.A.R.T. capable. The settings for this option are Disabled or
Enabled. *Note: SMART cannot predict all future device
failures. SMART should be used as a warning tool, not as a
tool to predict the device reliability.
Boot Up Num-Lock
Settings for this option are On or Off. When this option is set to
On, the BIOS turns off the Num Lock key when the system is
powered on. This will enable the end user to use the arrow keys
on both the numeric keypad and the keyboard.
PS/2 Mouse Support
Settings for this option are Enabled or Disabled. When this
option is set to Enabled, AMIBIOS supports a PS/2-type mouse.
Primary Display
This option specifies the type of display adapter card installed in
the system. The settings are Absent, VGA/EGA, CGA40x25,
CGA80x25 or Mono.
Password Check
This option enables the password check option every time the
system boots or the end user runs WinBIOS Setup. If Always is
chosen, a user password prompt appears every time the com-
puter is turned on. If Setup is chosen, the password prompt
appears if WinBIOS Setup is executed.
Boot to OS/2
If DRAM size is over 64 MB, set this option to Yes to permit
AMIBIOS to run with IBM OS/2. The settings are No or Yes.
CPU MicroCode Updation
The settings for this option are Disabled or Enabled. Set this
option to Enabled to allow the CPU microcode to be updated
online at any time.
Internal Cache
This option is for enabling or disabling the internal cache
memory. The settings for this option are Disabled, WriteThru or
WriteBack.

Chapter 2: Running Setup
2-7
System Bios Cacheable
AMIBIOS always copies the system BIOS from ROM to RAM for
faster execution. The settings are Disabled or Enabled. Note: the
Fail-Safe default setting is Disabled.Set this option to Enabled to
permit the contents of F0000h RAM memory segment to be written
to and read from cache memory.
C000, 16K Shadow
C400, 16K Shadow
These options specify how the contents of the video ROM are
handled. The settings are: Disabled, Enabled or Cached. When
set to Cached, the contents of the video ROM area from C0000h-
C7FFFh are not only copied from ROM to RAM, the contents of the
C0000h-C7FFFh RAM can be written to or read from cache
memory.
C800, 16K Shadow
CC00, 16K Shadow
D000, 16K Shadow
D400, 16K Shadow
D800, 16K Shadow
DC00, 16K Shadow
These options specify how the contents of the adaptor ROM
named in the option title are handled. The ROM area that is not
used by ISA adapter cards will be allocated to PCI adapter cards.
The settings are: Disabled, Enabled or Cached.
2-1-3 Chipset Setup
USB Function
The settings for this option are Enabled or Disabled. Set this
option to Enabled to enable the USB (Universal Serial Bus)
functions.
USB KB/Mouse Legacy Support
The settings for this option are Enabled or Disabled. Set this
option to Enabled to enable the USB keyboard and mouse.

2-8
BIOS User's Manual
SDRAM Autosizing Support
If the Serial Presence Detect (SPD) is not available, then the BIOS
will try to detect the memory and do the autosizing. The settings
for this option are Auto, Enabled or Disabled.
EDO DRAM Speed (ns)
This option should be set according to the speed of the EDO
DRAM in the system. The value of this option determines how the
EDO DRAM timings should be programmed in the chipset. The
settings for this option are Auto, Manual,50, 60 or 70.
EDO Read Burst Timing
Burst mode EDO have internal column counters. Because of this,
they do not need to accept row addresses and starting column
addresses from the EDO memory controller. This eliminates the
setup and hold time for the second and subsequent column
addresses. It also improves the EDO Read access time. The
settings for this option are x333 or x222.
EDO Write Burst Timing
Burst mode EDO have internal column counters. Because of this,
they do not need to accept row addresses and starting column
addresses from the EDO memory controller. This eliminates the
setup and hold time for the second and subsequent column
addresses. It also improves the EDO Write access time. The
settings for this option are x333 or x222.
EDO RAS Precharge
Memory needs to be recharged to ensure the information stored
is not lost. This feature eliminates the RAS (Row Address
Strobe) recharge time since memory must always be addressed
in the order of Row first, then Column. The settings for this
option are 4 Clks or 3 Clks.
EDO RAS to CAS
As previously described, memory must always be addressed in
the order of Row, then Column. The EDO RAS to CAS feature
sets the timing delay between Row addressing and Column
addressing. The settings for this option are 3 Clks or 2 Clks.
MA Waitstate
Use this feature to configure the memory address wait state. The
settings for this option are Slow or Fast.

Chapter 2: Running Setup
2-9
SDRAM Timing Latency
Use this feature to select the SDRAM timing delay. The settings
for this option are Manual or Auto.
SDRAM RAS to CAS
The settings for this option are 3 Clks or 2 Clks.
SDRAM CAS Lat
This feature is for the Column Address Strobe latency. The
settings for this option are 3 Clks or 2 Clks.
SDRAM RAS Precharge
This feature is for the SDRAM Row Address Strobe delay. The
settings for this option are 3 Clks or 2 Clks.
VGA Frame Buffer USWC
USWC is a memory cycle type that stands for Uncacheable
Speculative Write Combining. The settings are: Disabled or
Enabled.
PCI Frame Buffer USWC
The settings for this option are: Disabled or Enabled. When
Enabled, the PCI frame buffer address and length are divided into
2. The value is then programmed into the processor Variable
MTRR (3) with the value for USWC (01h).
DRAM Integrity Mode (ECC)
The settings for this option are: Non ECC, EC only or ECC. Set
this option to Enabled to enable ECC DRAM integrity mode. ECC
allows critical system to detect and correct memory errors, while
normal parity generator/checker can only detect such memory
errors.
Fixed Memory Hole
This option allows a memory hole to be specified for either the
512-640K region or the 15-16M region. The settings for this
option are Disabled, 512-640KB or 15-16MB.

2-10
BIOS User's Manual
Type F DMA Buffer Control 1
Type F DMA Buffer Control 2
Instead of 8 sysclock, Type F DMA only requires 3 sysclock to
finish the data transfer. These two options are device dependent.
The settings are Channel 0, Channel 1, Channel 2, Disabled,
Channel 3, Channel 5, Channel 6 or Channel 7.
DMA-0 Type
DMA-1 Type
DMA-2 Type
DMA-3 Type
DMA-5 Type
DMA-6 Type
DMA-7 Type
The settings for these Direct Memory Access channels are
Normal ISA, PC/PCI or Distributed.
AGP Aperture Size
This register determines the effective size of the Graphics Aper-
ture used in the particular PAC configuration. This register can
be updated by the PAC-specific BIOS configuration sequence
before PCI standard bus enumeration sequence takes place. If
the register is not updated, a default value selects aperture of
maximum size (i.e., 256 MB). The settings are: 4 MB, 8 MB, 16
MB, 32 MB, 64 MB, 128 MB or 256 MB.
System Type
The settings are: Auto, DP or UP.
USWC Write I/O Post
Use this feature for the WC Write Post During I/O Bridge Access
Enable (WPIO). When set to Enabled, posting of WC transactions
to PCI occur, even if the I/O bridge has been granted access to
the PCI bus via corresponding arbitration and buffer management
protocol. USWC Write posting should only be enabled if a USWC
region is located on the PCI bus. The settings are: Auto, Dis-
abled or Enabled.
MAA 1:0 Buf. Strength
MECC Buf. Strength
MD Buf. Strength
RCSA0/RCSB0 Buf. Strength
MAB 1:0 Buf. Strength

Chapter 2: Running Setup
2-11
MAA 13.2 Bufl Strength
RCSA1/RCSB1 Buf. Strength
RCSA2/RCSB2 Buf. Strength
RCSA3/RCSB3 Buf. Strength
RCSA4/RCSB4 Buf. Strength
CDQB 5,1 Buf. Strength
CDQA 5,1 Buf. Strength
CDQA 0, 2:4, 6:7 Buf. Strength
RCSA5/RCSB5 Buf. Strength
RCSA6/RCSB6 Buf. Strength
RCSA7/RCSB7 Buf. Strength
The above features control the memory buffer strength. They are
used to program the various DRAM interface signal buffer
strengths, based on memory configuration, DRAM type (EDO or
SDRAM), DRAM density (x4, x8, x16, or x32), DRAM technology (16
Mb or 64 Mb), and rows populated. Note the Optimal and Fail-
Safe default settings are Auto.
PAC Bus SERR#
The settings for this option are: Disabled or Enabled. When set
to Enabled, the PAC's SERR# signal driver is enabled and
SERR# is asserted for all relevant bits set in the ERRSTS and
PCISTS as controlled by the corresponding bits of the ERRCMD
register. When Disabled, SERR# is never driven by the PAC.
AGP Common SERR#
The settings are: Disabled or Enabled. Set to Enabled to permit
a common SERR# signal for AGP and the standard PCI bus.
AGP System Error Forwarding
The settings are: Disabled or Enabled. Set this option to Enabled
to enable AGP systems errors to be forwarded.
AGP Parity Error Response
The settings are: Disabled or Enabled. Set this option to Enabled
to enable AGP parity error response.
IRQ12
The settings are: Auto, Standard or Mouse. When this option is
set to Auto the AMIBIOS automatically determines how IRQ12
should be allocated. In the Standard setting IRQ12 is made
available for use on the ISA bus. IRQ12 is used by the PS/2
Mouse, when in Mouse setting.