Chapter 3
9
2. Typematic Rate (Chars/Sec)
The typematic rate sets the rate at which characters on the screen repeat when a key is
pressed and held down.
3. Typematic Delay (Msec)
The typematic delay sets how long after you press a key that a character begins
repeating.
Security Option
The Supervisor and/or User Password functions shown in Figure 3-1 must be set to take
advantage of this function. See Section 3.11 for password setting information. When the
Security Option is set to System, a password must be entered to boot the system or enter
the BIOS setup program. When the Security Option is set to Setup, a password is
required to enter the BIOS setup program.
APIC Mode
This item can enable or disable the APIC (
Advanced Programmable Interrupt
Controller
). Due to compliance to PC2001 design guide, the system is able to run in
APIC mode. Enabling APIC mode will expand available IRQs resources for the system.
Available options are [
Enabled
] and [
Disabled
].
MPS Version Control For OS
This item allows you to select which MPS (
Multi-Processor Specification
) version to be
used for the operating system. You need to select the MPS version which is supported by
your operating system. To find out which version to use, consult the vendor of your
operating system. Available options are [
1.4
] and [
1.1
].
OS Select For DRAM >64MB
If your system's DRAM is larger than 64MB and you are running OS/2, select OS/2 as
the item value. Otherwise, set the item value to Non-OS/2 for all other operating systems.
Video BIOS Shadow
Enabling this function will allow the Graphic card’s BIOS setting to be imaged onto the
RAM for a better performance. Leave the default setting at Enable for better system
performance.
Small Logo (EPA) Show
This setup allows photo that is EPA. Logo.
Show POST CODE
Enabling this function can show POST error code on the screen before proceeding to
operating system.
3-3 Advanced Chipset Features
By choosing the [
Advanced Chipset Features
] option from the CMOS Setup Utility
menu (Figure 3-1), the screen below is displayed. This sample screen contains the
manufacturer's default values for the motherboard.
All of the above settings have been determined by the motherboard
manufacturer and should not be changed unless you are absolutely sure of
what you are doing. Explanation of the DRAM timing and chipset features
setup is lengthy, highly technical and beyond the scope of this manual. Below
are some abbreviated descriptions of the functions in this setup menu.
Chapter 3
10
DRAM Clock/DRAM Timing
1. DRAM Clock
This selecting option allows you to control the DRAM speed.
2. DRAM Timing
The function allows you to enable or disable the DRAM timing by SPD. When
set to Manual, you can select the SDRAM CAS Latency, Bank Interleave,
Precharge to Active(Trp), Active to Precharge(Tras), Active to CMD(Trcd),
DRAM Command Rate, DRAM Burst Len, and CPU read DRAM Mode
configuration. It is recommended to keep the default setting for stable system
operation.
AGP & P2P Bridge Control
1. AGP Aperture Size
This function determines the amount of system memory that is given to the AGP card.
Options range from 4MB to 256MB. This is a dynamic memory allotment in that the
AGP card will only use the amount of memory that it needs. The remaining memory not
in use will be available for the system to use. For example, if 16MB is allotted to the
AGP card and the card only needs 8MB, the remaining 8MB will be available for system
use.
2. AGP Driving Control/Value
The [Manual] setting allows you to manually select the AGP driving value. However, it
is recommended that you keep the default setting [Auto] to allow the system to
automatically determine the appropriate AGP driving value.
3. AGP Fast Write
Selecting [
Enabled
] to allow Fast Write Protocol for 4X/2X AGP to function.
4. AGP Master 1 WS Write/Read
It is recommended to keep the default setting for stable system operation.
CPU & PCI Bus Control
1. CPU to PCI Write Buffer
Enabling this function will enhance the system efficiency.
2. PCI Master 0 WS Write
When Enabled, writes to PCI bus are executed with zero wait states.
3. PCI Delay Transaction
The chipset has an embedded 32-bit posted write buffer to support delay transactions
cycles. Select Enabled to support compliance with PCI specification version 2.1.
4. Delay Prior to Thermal
Available options: [
4 Min
] through [
32 Min
].
Memory Hole
Enabling this function will reserve the memory address space between 15MB and 16MB
for ISA expansion cards. However, enabling this function will result in not allowing the
system to have access to memory above 16MB. Please note that some expansion cards
require this setting to be enabled. The default setting is Disabled. If Auto Configuration is
enabled, you must set the DRAM timing function to 60ns or 70ns, depending on the type
of DRAM you install.
System BIOS Cacheable
Enabling this function allows caching of the system BIOS ROM at F0000h-FFFFFh,
resulting in better system performance. However, if any program writes to this memory
area, a system error may result. It is advised to leave this setting. Caching the system
BIOS results in better performance than shadowing the system BIOS.
