Intel E3815 FH8065301567411 Data Sheet
Product codes
FH8065301567411
Intel
®
Atom™ Processor E3800 Product Family
1034
Datasheet
Default: 00h
Type:
Memory Mapped I/O Register
(Size: 8 bits)
Offset:
GTTMMADR_LSB Type:
PCI Configuration Register (Size: 32
bits)
GTTMMADR_LSB Reference:
GTTMMADR_LSB Reference:
[B:0, D:2, F:0] + 10h
7
4
0
0
0
0
0
0
0
0
0
CR
T_
VS
YN
C_
PO
LA
R
ITY
CR
T_H
S
Y
N
C_
POLA
_RITY
PA
G
E
_
S
E
LE
C
T
RE
SE
RVED
CLO
C
K
_
SE
LEC
T
A0000_BFFFFH_M
E
M
OR
Y_A
C
CE
S
S
_E
NABLE
I_O_A
DDRE
S
S_S
E
LE
CT
Bit
Range
Default &
Access
Field Name (ID): Description
7
0b
RW
CRT_VSYNC_POLARITY:
This is a legacy function that is used in native VGA modes.
For most cases, sync polarity will be controlled by the port control bits. The VGA settings
can be optionally selected for compatibility with the original VGA when used in the VGA
native mode. Sync polarity was used in VGA to signal the monitor how many lines of
active display are being generated.
0 = Positive Polarity (default).
1 = Negative Polarity.
6
0b
RW
CRT_HSYNC_POLA_RITY:
This is a legacy function that is used in native VGA modes.
For most cases, sync polarity will be controlled by the port control bits. The VGA settings
can be optionally selected for compatibility with the original VGA when used in the VGA
native mode.
0 = Positive Polarity (default).
1 = Negative Polarity
5
0b
RW
PAGE_SELECT:
In Odd/Even Memory Map Mode 1 (GR6), this bit selects the upper or
lower 64 KB page in dis play mem ory for CPU access:
0 = Upper page (default)
1 = Lower page.
Selects between two 64KB pages of frame buffer memory during standard VGA odd/
even modes (modes 0h through 5h). Bit 1 of register GR06 can also program this bit in
other modes. Note that this bit is would normally set to 1 by the software.
4
0b
RW
RESERVED:
Read as 0.