protech ProX-1215, User Manual, Page: 58 / 95

Chapter 4 Award BIOS Setup
Prox-1215 USER
′
S MANUAL
Page: 4-13
It also coordinates communications between conventional ISA bus and the
PCI bus. It must be stated that these items should never need to be altered.
The default settings have been chosen because they provide the best opera-
ting conditions for the system. The only time you might consider making
any changes would be if you discovered that data was being lost while
using your system.
DRAM CLOCK:
This item allows you to control the DRAM speed.
SDRAM CYCLE LENGTH:
When synchronous DRAM is installed, the number of clock cycles of CAS
latency depends on the DRAM timing. Do not reset this field from the
default value specified by the system designer.
MEMORY HOLE:
In order to improve performance, certain space in memory is reserved for ISA
cards. This memory must be mapped into the memory space below 16MB.
P2C/C2P CONCURRENCY:
This item allows you to enable/disable the PCI to CPU, CPU to PCI
concurrency.
SYSTEM BIOS CACHEABLE:
This item allows you to enable 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.
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.
ONCHIP USB:
This should be enabled if your system has a USB installed on the system
board and you want to use it. Even when so equipped, if you add a higher
performance controller, you will need to disable this feature.