AMD Geode LX 600@0.7W Data Book page 368

33234H
6.6.19.18 Cursor Location Low
Index 0Fh
Type R/W
Reset Value 00h
Bit Name
7:0 CURS_LOW
6.6.19.19 Vertical Sync Start
Index 10h
Type R/W
Reset Value 00h
Bit Name
7:0 VERT_SYNC_ST
6.6.19.20 Vertical Sync End
Index 11h
Type R/W
Reset Value 00h
Bit Name
7 WR_PROT
6 RSVD
5 RSVD
4 RSVD
3:0 V_SYNC_END
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Cursor Location Low Register Bit Descriptions
Description
Cursor Location Register Bits [7:0]. Together with the register (CURS_HI, Index
0Eh[7:0]), this value specifies the frame buffer address where the cursor is displayed in
text mode. The cursor will appear at the character whose memory address corresponds
to this value.
Vertical Sync Start Register Bit Descriptions
Description
Vertical Sync Start Register Bits [7:0]. This value specifies the scan line number
where the vertical sync signal will go active. This is a 10-bit value. Bits 9 and 8 are in the
Overflow register (Index 07h[7,2]).
Vertical Sync End Register Bit Descriptions
Description
Write-Protect Registers. This bit is used to prevent old EGA programs from writing
invalid values to the VGA horizontal timing registers. The LINE_COMP8 (Index 07h[4])
is not protected by this bit.
Not Implemented. (Refresh Cycle Select)
Not Implemented. (Enable Vertical Interrupt)
Not Implemented.(Clear Vertical Interrupt)
Vertical Sync End Register Bits [3:0]. This field represents the low four bits of a com-
pare value that specifies which scan line that the vertical sync signal goes inactive.
Display Controller Register Descriptions
AMD Geode™ LX Processors Data Book