Teknor Industrial Computers VIPer 821, Техническое справочное руководство

Страница: 53 / 106

BIOS Setup Program
4-5
Option BIOS
Default
Setup
Default
Possible
Settings
Description
Security Option Setup Setup Setup, System If you have set a password, select whether the password is
required every time the system boots (“System” option), or only
when you enter Setup (“Setup” option).
OS Select For DRAM
>
64MB
Non-
OS2
Non-
OS2
Non-OS/2,
OS/2
Select OS2 only if you are running an OS/2 operating system with
greater than 64MB of RAM.
Save CMOS in Flash Dis. Dis. En., Dis. When this option is set to “Enabled”, the CMOS RAM Setup will
be restored from the Flash BIOS at each power up. If the battery
fails, only the date and time could be lost.
Video BIOS Shadow Dis. En. En., Dis.
CC000-CFFFF Dis. Dis. En., Dis.
D0000-D3FFF Dis. Dis. En., Dis.
D4000-D7FFF Dis. Dis. En., Dis.
D8000-DBFFF Dis. Dis. En., Dis.
DC000-DFFFF Dis. Dis. En., Dis.
Software that resides in a read-only memory (ROM) chip on a
device is called firmware. The Award BIOS allows shadowing of
firmware such as the system BIOS, the video BIOS, and similar
operating instructions that come with some expansion peripherals
(for example, a SCSI adaptor).
Shadowing copies firmware from ROM into system RAM, where
the CPU can read it through the 16-bit or 32-bit DRAM bus.
Firmware not shadowed must be read by the system through the
8-bit X-bus. Shadowing improves the performance of the system
BIOS and similar firmware for expansion peripherals.
Video BIOS shadows into memory area C0000-CBFFF. The
remaining areas shown on the BIOS Features Setup screen may
be occupied by other expansion card firmware. If an expansion
peripheral in your system contains ROM-based firmware, you
need to know the address range the ROM occupies to shadow it
into the correct area of RAM.