TYAN Trinity 100AT S1590 User Manual page 46

Chapter 4
BIOS Configuration
C7FFFh, resulting in better video performance. However, if any program writes
to this memory area, a memory access error may result in a system error.
System BIOS Cacheable
If Enabled, results in better system performance by permitting caching of the
system BIOS ROM at F0000h-FFFFFh. Any program which tries to write to this
memory area, however, may cause a system error.
Memory Hole at 15Mb Addr.
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.
AGP Aperture Size
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. See www.agpforum.org for AGP information.
SDRAM RAS to CAS Delay
This field lets you insert a timing delay between the CAS and RAS strobe
signals, used when DRAM is written to, read from, or refreshed. Fast gives
faster performance; and Slow gives more stable performance. This field applies
only when synchronous DRAM is installed in the system.
OnChip USB
The chipset contains an integrated USB controller. Select Enabled if you have
USB peripherals.
USB Keyboard Support
Select Enabled if you have a USB keyboard.
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