Abit SL6 User Manual page 53

BIOS Setup 3-23
caching of the video BIOS, resulting in better system performance. However, if any program
writes to this memory area, a system error may result.
Memory Hole At 15M-16M:
Two options are available: Enabled and Disabled. The default setting is Disabled. This
option is used to reserve the memory block 15M-16M for ISA adapter ROM. Some special
peripherals need to use a memory block located between 15M and 16M, and this memory
block has a size of 1M. We recommend that you disable this option.
Delayed Transaction:
Two options are available: Enabled and Disabled. The default setting is Enabled. Set the
option to enabled or disabled PCI 2.1 features including passive release and delayed
transaction for the chipset. This function is used to meet the latency of PCI cycles to or from
the ISA bus. This option must be enabled to provide PCI 2.1 compliance. If you have an ISA
card compatibility problem, you can try to enable or disable this option for optimal results.
On-Chip Video Window Size:
Three options are available: 64MB ) 32MB ) Disabled. The default setting is 64MB.
This option specifies the amount of system memory that can be used by the AGP graphic
data.
AGP Graphics Aperture Size:
Two options are available: 32M ) 64M. The default setting is 64M. This option specifies
the amount of system memory that can be used by the AGP device. 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. See
www.agpforum.org for AGP information.
Display Cache Frequency
Two options are available: 100 Mhz and 133 Mhz. The default setting is 100 Mhz. You can
choose the running speed for local memory, but if your memory module does not support the
speed you choose, it may cause a system boot failure or data loss problem.
User's Manual