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System board options (continued)
Option
Settings
Diskette
1
Not installed
drives A
and B
Embedded
~ hard disk
controller
Hard disk
drives C
and D
360KB (5.25 inch)
1.2MB (5.25 inch)
720KB (3.5 inch)
1.44MB (3.5 inch)
Enabled
Disabled
Not installed
User defined
Type (1 to 64)
I
Description
Set to type of diskette drive(s)
assigned as drives A and B;
BIOS disables the built-in
diskette drive controller if it
detects a conflicting controller
on an option card
Set to the desired setting for
the built-in IDE controller; BIOS
disables the built-in controller if
it detects a conflicting
controller on an option card
Set to the type of hard disk
drives installed as drives C and
D or select User defined (see
“Hard disk drive types” below)
Non-cache areas
Your computer automatically caches all of your memory except
for the six non-cache memory blocks listed in the table below.
You can define up to three additional, 16KB, non-cache
memory blocks by selecting the User defined non-cache area(s)
option and entering the block addresses. For example, if you
install a network or bus-mastering option card, such as a SCSI
controller, you should set the address blocks used by these
boards as non-cache blocks to avoid any memory conflicts.
Default non-cache address blocks
Address range (hex) Function
A0000 through AFFFF EGA or VGA video memory
BOO00 through BFFFF
MDA or CGA video memory
COO00 through C7FFF
VGA BIOS (RAM shadow area)
C8000 through DFFFF
Adapter ROM area
E0000 through EFFFF
Adapter ROM area
F0000 through FFFFF
System BIOS ROM
2-24
Running System Configuration