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362 AMD Geode™ LX Processors Data Book
Display Controller Register Descriptions
33234H
6.6.19.1 CRTC Index
Table 6-54. CRTC Registers Summary
Index Type Register Reset Value Reference
-- R/W CRTC Index 00h Page 362
-- R/W CRTC Data 00h Page 363
00h R/W Horizontal Total 00h Page 363
01h R/W Horizontal Display Enable End 00h Page 363
02h R/W Horizontal Blank Start 00h Page 363
03h R/W Horizontal Blank End 00h Page 364
04h R/W Horizontal Sync Start 00h Page 364
05h R/W Horizontal Sync End 00h Page 364
06h R/W Vertical Total 00h Page 365
07h R/W Overflow xxh Page 365
08h R/W Preset Row Scan 00h Page 365
09h R/W Maximum Scan Line 00h Page 366
0Ah R/W Cursor Start 00h Page 366
0Bh R/W Cursor End 00h Page 367
0Ch R/W Start Address High 00h Page 367
0Dh R/W Start Address Low 00h Page 367
0Eh R/W Cursor Location High 00h Page 367
0Fh R/W Cursor Location Low 00h Page 368
10h R/W Vertical Sync Start 00h Page 368
11h R/W Vertical Sync End 00h Page 368
12h R/W Vertical Display Enable End 00h Page 369
13h R/W Offset 00h Page 369
14h R/W Underline Location 00h Page 369
15h R/W Vertical Blank Start 00h Page 370
16h R/W Vertical Blank End 00h Page 370
17h R/W CRTC Mode Control 00h Page 370
18h R/W Line Compare 00h Page 372
22h R/W CPU Data Latch State 00h Page 372
24h R/W Attribute Index/Data FF State 00h Page 372
26h R/W Attribute Index State xxh Page 373
Index Address 3B4h or 3D4h
Typ e R /W
Reset Value 00h
CRTC Index Register Bit Descriptions
Bit Name Description
7 RSVD Reserved.
6:0 INDEX Index.