VIA Technologies Zida BX983D User Manual page 29

Memory Hole At 15M-16M
In order to improve performance, certain space in memory can be reserved for ISA cards. This memory
must be mapped into the memory space below 16 MB.
Enabled Memory hole supported.
Disabled Memory hole not supported.
Read Around Write
DRAM optimization feature: If a memory read is addressed to a location whose latest write is being held in
a buffer before being written to memory, the read is satisfied through the buffer contents, and the read is
not sent to the DRAM
The choice: Enabled, Disabled.
Concurrent PCI/Host
When disable, CPU bus will be occupied during the entire PCI operation period.
The choice: Enabled, Disabled.
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.
Enabled Video RAM access cached
Disabled Video RAM access not cached
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. Host cycles that hit the aperture
range are forwarded to the AGP without any translation.
The choice: 4, 8, 16, 32, 64, 128, 256
OnChip USB
This should be enabled if your system has a USB installed on the system board and you wish to use it. Even
when so equipped, if you add a higher performance controller, you will need to disable this feature.
The choice: Enabled, Disabled.
USB Keyboard Support
Select Enabled if your system contains a Universal Serial Bus (USB) controller and you have a USB
keyboard.
The choice: Enabled, Disabled.
Page 29
Mainboard Installation