http://www.tyan.com
48
Chapter 4
BIOS Configuration
settings are Yes or No.
Internal Cache
This option sets the type of caching algorithm used by the L1 internal
cache memory on the CPU. The settings are Disabled, WriteThru, or
WriteBack.
System BIOS Cacheable
When set to Enabled, the contents of the F0000h system memory
segment can be read from or written to cache memory. The contents
of this memory segment are always copied from the BIOS ROM to
system RAM for faster execution. The settings are Enabled or Dis-
abled.
Cache Bus ECC
When Enabled, this option permits ECC error checking on the L2
cache bus. This ensures that cached data is not improperly altered. The
settings are Enabled or Disabled. The Optimal and Fail-safe default
settings are Enabled.
Default Primary Video
For systems which have both AGP and PCI VGA cards, you may
select one as the primary video card. The settings are AGP or PCI.
C000,16K Shadow and C400,16K Shadow
These options specify how the 32 KB of video ROM at C0000h is
treated. The settings are:
g
n
i
t
t
e
S
n
o
i
t
p
i
r
c
s
e
D
d
e
l
b
a
s
i
D
.
M
A
R
o
t
d
e
i
p
o
c
t
o
n
e
r
a
M
O
R
o
e
d
i
v
e
h
t
f
o
s
t
n
e
t
n
o
c
e
h
T
d
e
l
b
a
n
E
o
t
M
O
R
m
o
r
f
)
d
e
w
o
d
a
h
s
(
d
e
i
p
o
c
e
r
a
h
F
F
F
7
C
-
h
0
0
0
C
m
o
r
f
a
e
r
a
M
O
R
o
e
d
i
v
e
h
t
f
o
s
t
n
e
t
n
o
c
e
h
T
.
n
o
i
t
u
c
e
x
e
r
e
t
s
a
f
r
o
f
M
A
R
d
e
h
c
a
C
n
a
c
d
n
a
M
A
R
o
t
M
O
R
m
o
r
f
d
e
i
p
o
c
e
r
a
h
F
F
F
7
C
-
h
0
0
0
C
m
o
r
f
a
e
r
a
M
O
R
o
e
d
i
v
e
h
t
f
o
s
t
n
e
t
n
o
c
e
h
T
.
y
r
o
m
e
m
e
h
c
a
c
m
o
r
f
d
a
e
r
r
o
o
t
n
e
t
t
i
r
w
e
b
