VT8601 Via, VT8601 Datasheet - Page 101

• Manufacturer Part Number: VT8601
• Description: Slot-1 / Socket-370 PCI North Bridge
• Manufacturer: Via

Hardware Cursor Registers
The ProMedia supports a Windows® compatible hardware
cursor. The hardware cursor operates only in extended planar
and packed pixel modes. The cursor size can be selected
between 32x32 and 64x64.
define the cursor shape. The table below shows how these
two bits operate on each pixel. The hardware cursor pattern
is stored in off-screen memory.
CR43-40 – Hardware Cursor Position ............................ RW
CR45-44 – Hardware Cursor Pattern Location ............. RW
CR47-46 – Hardware Cursor Offset................................ RW
CR4F-48 – Hardware Cursor Color ................................ RW
Revision 1.3 September 8, 1999
Plane 0
(AND)
31-28 Reserved
27-16 Hardware Cursor Position Y Dimension
15-12 Reserved
15-12 Reserved
63-56 Reserved
55-32 Hardware Cursor Background Color
31-24 Reserved
11-0 Hardware Cursor Position X Dimension
11-0 Hardware Cursor Map Mask Storage Location
14-8 Hardware Cursor Position Y-Offset
23-0 Hardware Cursor Foreground Color
6-0
15
1
1
0
0
7
Table 11. Hardware Cursor Pixel Operation
7HFKQRORJLHV ,QF
1KB aligned in the frame buffer
Reserved
Reserved
Hardware Cursor Position X-Offset
Plane 1
:H &
(XOR)
:H &R R QQHFW
0
1
1
0
QQHFW
VGA Data Inversion
Cursor BG Color
Pixel Operation
Cursor FG Color
(Windows®)
........................................ always reads 0
........................................ always reads 0
........................................ always reads 0
........................................ always reads 0
........................................ always reads 0
........................................ always reads 0
........................................ always reads 0
Transparent
Two 2-bits-per-pixel images
Cursor BG Color
Cursor FG Color
Pixel Operation
Transparent
Transparent
(X11)
-95
CR50 – Hardware Cursor Control ................................. RW
3-2
1-0
7
6
5
4
Hardware Cursor Enable
Hardware Cursor Mode
Hardware Cursor Color Control 3
Hardware Cursor Color Control 2
Reserved
Hardware Cursor Size
00 128x128 ................................................ default
01 64x64
10 32x32
11 -reserved-
0
1
0
1
0
1
0
1
Disable .................................................. default
Enable
MS Windows™ Compatible ................. default
X11 Compatible
Disable .................................................. default
Enable
Disable................................................... default
Enable
........................................ always reads 0
VT8601 Apollo ProMedia
VGA Extended Registers