MSI K7N420 Pro User Manual page 54

Chapter 3
APIC Mode
This item is used to enable or disable the APIC (Advanced Programmable
Interrupt Controller). Due to compliance to PC2001 design guide, the system
is able to run in APIC mode. Enabling APIC mode will expand available IRQs
resources for the syst em. Available options are [En abled] and [Di sabled].
MPS Version Control For OS
This i tem allows y ou to select which MPS (Multi-Processor Specification)
version t o be used for th e operating syst em. You need to select the MPS
version supported by y our operating system. To fin d out which version to
use, consult the vendor of your operat ing system. Available op tions are [1.
4] and [1.1].
OS Select For DRAM > 64MB
®
This i tem is set for the users running OS/2 operating system. When set to
®
[No n-OS2], you can no t run the OS/2 op erati ng sy stem when DRAM in-
stal led is l arger t han 64 M B. When set to [OS2], it is p ossible. Avail able
options are [Non-OS2] an d [OS2].
Video BIOS Shadow
This item allows you to increase the video performance by caching the data
from v ideo ROM to Shadow RAM . When set to [Enabled ], the syst em ob-
tai ns better video perfo rmance but , at this time, any p rogram att empts to
writ e to thi s memory area will cau se a sy stem error. Av ailable options are
[Disabled] an d [Enabled].
C8 000 -CB FFF/CC000 -CFFFF/D0 00 0-D3FFF/D400 0-D7FFF/D800 0-
DBFFF/DC000-DFFFF Shadow
These items specify whether the cont ents of the adapter ROM named in the
items will be copied into RAM to improve the performance of ROM firmware
for adapt ers. You need to know the address o f each adapter ROM occupies
to shad ow (copy) it into the correct area o f RAM. Avail able opti ons are
[Disabled] an d [Enabled].
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