Intel 815 Manuel D’Utilisation
Intel® 815 Chipset: Graphics Controller PRM, Rev 1.0
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20.4.
Hardware Cursor
The hardware cursor registers are memory mapped and accessible through 32 bit accesses.
20.4.1. CURCNTR—Cursor Control Register
Memory Offset Address:
70080h
Default: 0000h
Attributes: Read/Write
Attributes: Read/Write
This register is double buffered. The load register is transferred into the active register on the asserting
edge of Vertical Sync.
edge of Vertical Sync.
15
5
4
3
2 0
Reserved
Coord
Origin
Origin
Select
Res Cursor
Mode
Select
Bit Descriptions
15:5
Reserved.
4
Cursor Coordinate System Origin Select.
0 = Selects the outermost upper left-hand corner of the screen border as the origin for the coordinate
system used to position cursor. (default).
1 = Selects the upper left-hand corner of the active display area as the origin for the coordinate system
used to position cursor.
3
Reserved.
2:0
Cursor Mode Select. These three bits select the mode for the cursor as follows:
000 = Cursor is disabled. This is the default after reset.
001 = 32x32 2bpp AND/XOR 2-plane mode
010 = Reserved
011 = Reserved
100 = 64x64 2bpp 3-color and transparency mode
101 = 64x64 2bpp AND/XOR 2-plane mode
110 = 64x64 2bpp 4-color mode
111 = Reserved