AMD Geode LX 800@0.9W - Manual (Page 363)

AMD Geode™ LX Processors Data Book 363
Display Controller Register Descriptions 33234H
6.6.19.2 CRTC Data
6.6.19.3 Horizontal Total
6.6.19.4 Horizontal Display Enable End
6.6.19.5 Horizontal Blank Start
Data Address 3B5h or 3D5h
Type R/W
Reset Value 00h
CRTC Data Register Bit Descriptions
Bit Name Description
7 RSVD Reserved.
6:0 DATA Data.
Index 00h
Type R/W
Reset Value 00h
Horizontal Total Register Bit Descriptions
Bit Name Description
7:0 H_TOTAL Horizontal Total. This value specifies the number of character clocks per horizontal
scan line minus 5. It determines the horizontal line rate/period.
Index 01h
Type R/W
Reset Value 00h
Horizontal Display Enable End Register Bit Descriptions
Bit Name Description
7:0 H_DISP_END Horizontal Display Enable End. This value specifies the number of displayed charac-
ters minus 1. It determines the width of the horizontal display enable signal.
Index 02h
Type R/W
Reset Value 00h
Horizontal Blank Start Register Bit Descriptions
Bit Name Description
7:0 H_BLANK_ST Horizontal Blank Start. This value specifies the character position on the line where the
horizontal blanking signal goes active.