
AMD Geode™ SC2200 Processor Data Book
351
Video Processor Module - Video Processor Registers - Function 4
32580B
23:0
CUR_COLOR_KEY (Cursor Color Key).
Specifies the 24-bit RGB value of the cursor color key. The incoming graphics
stream is compared with this value. If a match is detected, the pixel is replaced by a 24-bit value from one of the Cursor
Color registers.
Offset 54h-57h
Cursor Color Mask Register (R/W)
Reset Value: 00000000h
31:24
Reserved.
23:0
CUR_COLOR_MASK (Cursor Color Mask).
This mask is a 24-bit value. Zeroes in the mask cause the corresponding bits
in the incoming graphics stream to be ignored.
Offset 58h-5Bh
Cursor Color Register 1 (R/W)
Reset Value: 00000000h
31:24
Reserved.
23:0
CUR_COLOR_REG1 (Cursor Color Register 1).
Specifies a 24-bit cursor color value. This is an RGB value (for RGB
blending) or a YUV value (for YUV blending). In interlaced YUV blending mode, Y/2 value should be used.
This is one of two possible cursor color values. The COLOR_REG_OFFSET bits (Memory Offset 50h[28:24])
determine a bit of the graphics data that if even, selects this color to be used.
Offset 5Ch-5Fh
Cursor Color Register 2 (R/W)
Reset Value: 00000000h
31:24
Reserved
.
23:0
CUR_COLOR_REG2 (Cursor Color Register 2).
Specifies a 24-bit cursor color value. This is an RGB value (for RGB
blending) or a YUV value (for YUV blending). In interlaced YUV blending mode, Y/2 value should be used.
This is one of two possible cursor color values. The COLOR_REG_OFFSET bits (Memory Offset 50h[28:24])
determine a bit of the graphics data that if even, selects this color to be used.
Offset 60h-63h
Alpha Window 1 X Position Register (R/W)
Reset Value: 00000000h
Note:
H_TOTAL and H_SYNC_END are values programmed in the GX1 module’s Display Controller Timing registers
(Memory Offset 8330h[26:19] and 8338h[10:3], respectively). The value of (H_TOTAL – H_SYNC_END) is some-
times referred to as “horizontal back porch”. For more information, see the
GX1 Processor Series Data Book
.
Desired screen position should not be outside a video window (Memory Offset 08h and 0Ch).
31:27
Reserved.
26:16
ALPHA1_X_END (Alpha Window 1 Horizontal End).
Determines the horizontal end position of Alpha Window 1 (not inclu-
sive). This value is calculated according to the following formula:
Value = Desired screen po (H_TOTAL – H_SYNC_END) – 1.
15:11
Reserved.
10:0
ALPHA1_X_START (Alpha Window 1 Horizontal Start).
Determines the horizontal start position of Alpha Window 1. This
value is calculated according to the following formula:
Value = Desired screen po (H_TOTAL – H_SYNC_END) – 2.
Offset 64h-67h
Alpha Window 1 Y Position Register (R/W)
Reset Value: 00000000h
Note:
V_TOTAL and V_SYNC_END are values programmed in the GX1 module’s Display Controller Timing registers
(Memory Offset 8340h[26:16] and 8348h[26:16], respectively). The value of (V_TOTAL – V_SYNC_END) is some-
times referred to as “vertical back porch”. For more information, see the
GX1 Processor Series Data Book
.
Desired screen position should not be outside a video window (Memory Offset 08h and 0Ch).
31:27
Reserved.
26:16
ALPHA1_Y_END (Alpha Window 1 Vertical End).
Determines the vertical end position of Alpha Window 1 (not inclusive).
This value is calculated according to the following formula:
Value = Desired screen po (V_TOTAL – V_SYNC_END) + 2.
15:11
Reserved.
10:0
ALPHA1_Y_START (Alpha Window 1 Vertical Start).
Determines the vertical start position of Alpha Window 1. This value
is calculated according to the following formula:
Value = Desired screen po (V_TOTAL – V_SYNC_END) + 1.
Offset 68h-6Bh
Alpha Window 1 Color Register (R/W)
Reset Value: 00000000h
31:25
Reserved.
Table 7-7. Memory Offset: Video Processor Configuration Registers (Continued)
Bit
Description
Содержание Geode SC2200
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