Chapter3 BIOS Setup
30
User’s Manual
3.5 Advanced Chipset Setup
When you select the “ADVANCED CHIPSET SETUP” on the main program, the screen display will appears
as:
Advanced Chipset Setup Screen
AMIBIOS SETUP – ADVANCED CHIPSET SETUP
© 2001 American Megatrends, Inc. All Rights Reserved
******** DRAM Timing ********
Available Options:
Configure SDRAM Timing by SPD
Enabled
Disable
SDRAM CAS# Latency
3
f
Enable
DRAM Bank Interleave
Enabled
Memory Hole
Disabled
AGP Mode
4x
AGP Fast Write
Enable
AGP Aperture Size
64MB
AGP Master 1 W / S Write
Disabled
AGP Master 1 W / S Read
Disabled
Search for MDA Resources
Yes
PCI Delay Transaction
Disabled
ISA Bus Clock
PCICLK / 4
USB Controller
Disabled
USB Device Legacy Support
Disabled
Port 64/60 Emulation
Disabled
ESC : Exit
↑↓
: Sel
OnChip VGA Frame Buffer Size
8MB
PgUp/PgDn :
Modify
LCD Resolution
1024
°
768 TFT 65Mhz
F1:Help
F2/F3 : Color
In the ‘Advanced Chipset Setup’ page, all options are predefined by the system board designer. Any
attempt to change the parameter of the fields is not recommended.
Configure SDRAM Timing by SPD:
This option provides DIMM plug-and-play support by Serial Presence
Detect (SPD) mechanism via the System Management Bus (SMBus) interface. You can disable this option to
manage the following SDRAM timing options by yourself. In addition, SDRAM operating timings may follow
serial presence from EEPROM content by setting this option to "Enabled", and all of SDRAM timing options
will be not available and hidden.
DRAM Bank Interleave:
This feature enables you to set the interleave mode of the SDRAM interface.
Interleaving allows banks of SDRAM to alternate their refresh and access cycles. One bank will undergo its
refresh cycle while another is being accessed. This improves performance of the SDRAM by masking the
refresh time of each bank.
Memory Hole:
This option allows the end user to specify the location of a memory hole for memory space
requirement from ISA-bus cards.
AGP Mode:
The main different between AGP 1X, 2X, and 4X is the VGA operating voltage. AGP 4X is using
1.5V and AGP2X/1X are using 3.3V. Of course, the transfer rate of AGP 4X is faster than AGP 2X/1X
AGP Fast Write:
Allows data to be sent directly from the core logic (i.e. chipset) to the AGP master
(graphics chip) instead of keeping a copy in system memory and making the AGP master fetch it. Enabled is
best for performance, and probably only works with 4x cards anyway.
AGP Aperture Size:
This option specifies the amount of system memory that can be used by the
Accelerated Graphics Port (AGP).
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