sc3200 Advanced Micro Devices, sc3200 Datasheet - Page 358
sc3200
Manufacturer Part Number
sc3200
Description
Geode-tm Sc3200 Processor
Manufacturer
Advanced Micro Devices
Datasheet
1.SC3200.pdf
(447 pages)
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358
Offset 60h-63h
Note:
Offset 64h-67h
Note:
Offset 68h-6Bh
Offset 6Ch-6Fh
31:27
26:16
15:11
31:27
26:16
15:11
31:25
31:18
10:0
10:0
23:0
15:8
Bit
7:0
24
17
16
Table 7-7. F4BAR0+Memory Offset: Video Processor Configuration Registers (Continued)
H_TOTAL and H_SYNC_END are values programmed in the GX1 module’s Display Controller Timing registers
(GX_BASE+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 AMD Geode™ GX1 Processor Data Book.
Desired screen position should not be outside a video window (F4BAR0+Memory Offset 08h and 0Ch).
V_TOTAL and V_SYNC_END are values programmed in the GX1 module’s Display Controller Timing registers
(GX_BASE+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 AMD Geode™ GX1 Processor Data Book.
Desired screen position should not be outside a video window (F4BAR0+Memory Offset 08h and 0Ch).
Description
Reserved.
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 position + (H_TOTAL – H_SYNC_END) – 1.
Reserved.
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 position + (H_TOTAL – H_SYNC_END) – 2.
Reserved.
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 position + (V_TOTAL – V_SYNC_END) + 2.
Reserved.
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 position + (V_TOTAL – V_SYNC_END) + 1.
Reserved.
ALPHA1_COLOR_REG_EN (Alpha Window 1 Color Register Enable). Enable bit for the color key matching in Alpha
Window 1.
1: Enable. If this bit is enabled and the alpha window is enabled, then where there is a color key match. The color value (in
0: Disable. Where there is a color key match, no blending is performed.
ALPHA1_COLOR_REG (Alpha Window 1 Color Register). Specifies the color to be displayed inside Alpha Window 1
when there is a color key match in the alpha window. 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 color is only displayed if the alpha window is enabled and bit 24 (ALPHA1_COLOR_REG_EN) is enabled.
Reserved.
LOAD_ALPHA (Load Alpha Value). (Write Only) When set to 1, this bit causes the Video Processor to load the alpha
value (in bits [7:0], ALPHA_VAL) at the start of the next frame.
ALPHA1_WIN_EN (Alpha Window 1 Enable). Enable bit for Alpha Window 1.
1: Enable Alpha Window 1.
0: Disable Alpha Window 1.
Note:
ALPHA1_INC (Alpha Window 1 Increment). Specifies the alpha value increment/decrement. This is a signed 8-bit value
that is added to the alpha value for each frame. The MSB (bit 15) indicates the sign (i.e., increment or decrement). When
this value reaches either the maximum or the minimum alpha value (255 or 0) it keeps that value (i.e., it is not incremented/
decremented) until it is reloaded via bit 17 (LOAD_ALPHA).
ALPHA1_VAL (Alpha Window 1 Value). Specifies the alpha value to be used for this window.
bits [23:0], ALPHA1_COLOR_REG) is displayed.
Valid only if video window is enabled (F4BAR0+Memory Offset 00h[0] = 1).
Revision 5.1
Alpha Window 1 X Position Register (R/W)
Alpha Window 1 Y Position Register (R/W)
Alpha Window 1 Control Register (R/W)
Alpha Window 1 Color Register (R/W)
Video Processor Module - Video Processor Registers - Function 4
AMD Geode™ SC3200 Processor Data Book
Reset Value: 00000000h
Reset Value: 00000000h
Reset Value: 00000000h
Reset Value: 00000000h
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