VT8601 Apollo ProMedia
Revision 1.3 September 8, 1999
-83
VGA Extended Registers
7HFKQRORJLHV ,QF
:H&
:H&RRQQHFW
QQHFW
SRAF-AE – Capture Row Byte Offset ............................RW
15
Reserved
........................................ always reads 0
14
Capture Address Initial Control
13-0 Capture Row Byte
SRB1-B0 – Window 1 HSB Control ................................RW
15-10 Brightness
9-5
Sin(Hue) * Saturation * 8 (bit-9 is the sign bit)
4-0
Cos(Hue) * Saturation * 8 (bit-4 is the sign bit)
Hue range is 0-360 degrees (default = 0)
Saturation range is 0-1.875 (default = 1)
SRB3-B2 – Window 2 HSB Control ................................RW
15-10 Brightness
9-5
Sin(Hue) * Saturation * 8 (bit-9 is the sign bit)
4-0
Cos(Hue) * Saturation * 8 (bit-4 is the sign bit)
Hue range is 0-360 degrees (default = 0)
Saturation range is 0-1.875 (default = 1)
SRB6-B4 – Second Display Address Select .....................RW
23-20 Reserved
........................................ always reads 0
19-0 Second Display Address for Double Buffering
Second display address for double buffering instead
of capture address
SRB7 – Video Sharpness...................................................RW
7-0
Video Sharpness Factor
SRBA-B8 – Second Capture Address Select ...................RW
23-20 Reserved
........................................ always reads 0
19-0 Second Capture Address for Double Buffering
Second capture address for double buffering instead
of display address
SRBC – Contrast Control.................................................RW
7-4
Window 2 Contrast
3-0
Window 1 Contrast
SRBD – Dual View Mux Control .................................... RW
7-3
Reserved
........................................ always reads 0
2-0
CRT / TV View Multiplexing Control
00x Color key 1 determines top window (1=W1)def
010 Video window 1 overlay
011 Video window 2 overlay
10x Window key defines window 1 on top
11x Window key defines window 2 on top
SRBE – Miscellaneous Control Bits................................ RW
7
Planar Capture
0
Off
.................................................... default
1On
6-5
Capture Start Address W/R Control (CR98[19-
0])
0x W/R Y address....................................... default
10 W/R U address
11 W/R V address
4
Video Engine Power Saving Mode
0
On
.................................................... default
1On
3
Reserved
........................................ always reads 0
2
Interpolation Bypass
0
Interpolation .......................................... default
1Bypass
1
Window 2 HSCB Enable
0
Bypass ................................................... default
1Enable
0
Window 1 HSCB Enable
0
Bypass ................................................... default
1Enable
SRCE – Window 2 Live Video Control .......................... RW
7
Reserved
........................................ always reads 0
6
W2 Vertical Interpolation
0
Disable................................................... default
1Enable
5
Planar Mode X (Horizontal) Y/UV Ratio
0
2x
.................................................... default
14x
4-3
Planar Mode Y (Vertical) Y/UV Ratio
00 2x (Yp420) ............................................ default
01 4x (Yp410)
1x 1x (Yp422)
2-0
Window Mode .................................... default = 000b
Format
Interpolation
Line Buffers
000 YUV422
H-V
(96+48) x 64
001 Planar
H-V
(96+48) x 64
01x YUV
FIFO H
96 x 64
100 MPEG2 YUV422
H-V
2x(96+48)x64
101 MPEG2 Planar
H-V
2x(96+48)x64
11x YUV422
H-V (V-YUV) 2x(96+48)x64
For 1xx, only one h/w overlay window is supported
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