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).
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
VGA Sequencer Index
0xh
Page 358
--
R/W
VGA Sequencer Data
xxh
Page 358
00h
R/W
VGA Reset
00h
Page 358
01h
R/W
VGA Clocking Mode
02h
Page 359
02h
R/W
VGA Map Mask
00h
Page 359
03h
R/W
VGA Character Map Select
xxh
Page 360
04h
R/W
VGA Memory Mode
02h
Page 360
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.
Summary of Contents for Geode LX 600
Page 14: ...14 AMD Geode LX Processors Data Book Overview 33234H...
Page 20: ...20 AMD Geode LX Processors Data Book Architecture Overview 33234H...
Page 44: ...44 AMD Geode LX Processors Data Book Signal Definitions 33234H...
Page 88: ...88 AMD Geode LX Processors Data Book GLIU Register Descriptions 33234H...
Page 618: ...618 AMD Geode LX Processors Data Book Electrical Specifications 33234H...