Справочник Пользователя для AMD LX 800@0.9W
358
AMD Geode™ LX Processors Data Book
Display Controller Register Descriptions
33234H
6.6.18
VGA Sequencer Registers
The Sequencer registers are accessed by writing an index value to the Sequencer Index register (3C4h) and reading or
writing the register using the Sequencer Data register (3C5h).
writing the register using the Sequencer Data register (3C5h).
6.6.18.1 VGA Sequencer Index
6.6.18.2 VGA Sequencer Data
6.6.18.3 VGA Reset
Table 6-51. VGA Sequencer Registers Summary
Index
Type
Register
Reset Value
Reference
--
R/W
0xh
--
R/W
xxh
R/W
00h
R/W
02h
R/W
00h
R/W
xxh
R/W
02h
Index Address
3C4h
Type
R/W
Reset Value
0xh
VGA Sequencer Index Register Bit Descriptions
Bit
Name
Description
7:3
RSVD
Reserved.
2:0
INDEX
Index.
Data Address
3C5h
Type
R/W
Reset Value
xxh
VGA Sequencer Data Register Bit Descriptions
Bit
Name
Description
7:0
DATA
Data.
Index
00h
Type
R/W
Reset Value
00h
VGA Reset Register Bit Descriptions
Bit
Name
Description
7:2
RSVD
Reserved.
1:0
DIS_EN
Enable Display. Both these bits should be set to 1 (value = 11) to enable display of the
VGA screen image. If either of these bits are 0, the display is blanked. The VGA contin-
ues to respond to I/O and memory accesses.
VGA screen image. If either of these bits are 0, the display is blanked. The VGA contin-
ues to respond to I/O and memory accesses.