BCM QS750 User Manual download pdf (Page 40)

4. BIOS Setup

4.5 Advanced Chipset Features Setup Menu

Advanced Chipset Features

Move to items

Enter Sub-

Modify values

System BIOS Cacheable

Video RAM Cacheable

Memory Hole At 15M-16M

AGP Aperture Size (MB)

AGP ISA Aliasing

K7 CLK_CTL Select

SDRAM ECC Setting

SDRAM PH Limit

SDRAM Idle Limit

SDRAM Trc Timing Value

SDRAM Trp Timing Value

SDRAM Tras Timing Value

SDRAM CAS Latency

SDRAM Trcd Timing Value

Enabled

Disabled

Enabled

Optimal

Disabled

64 Cycle

8 Cycle

7 Cycle

2 Cycle

5 Cycle

3 Cycle

2 Cycle

Item Help

Menu Level

Exit to Main

¡ô¡õ¡÷¡ö:Move Enter: Select +/-/PU/PD/ : Modify F10:Save Esc: Exit F1:

General Help

F5:Previous Values F6:Fail-Safe Defaults F7: Optimized Defaults

Figure 4: Advanced Chipset Features Setup Menu

4.5.1 System BIOS Cacheable

Select Enabled 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.

4.5.2 Video RAM Cacheable

Select Enabled allows caching of the Video RAM, resulting in better system performance.

However, if any program writes to this memory area, a system error may result.

4.5.3 Memory Hole At 15M – 16M

You can reserve this area of system memory for ISA adapter ROM. When this area is

reserved, it cannot be cached. The user information of peripherals that need to use this area

of system memory usually discusses their memory requirements.

4.5.4 AGP Aperture Size (MB)

Select the size of the Accelerated Graphics Port (AGP) aperture. The aperture is a portion of

the PCI memory address range dedicated for graphics memory address space. Hose cycles

that hit the aperture range are forwarded to the AGP without any transaction. See

www.agpforum.org for AGP information.

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BCM QS750 User Manual Page 40

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