VT8601 Apollo ProMedia
Revision 1.3 September 8, 1999
-80
VGA Extended Registers
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Graphics Video Display Registers
SR82-80 – Window 1 U-Plane FB Start Address............RW
23-20 Reserved
........................................ always reads 0
19-0 W1 U-Plane FB Start Address
When operating in planar mode, this field defines the
frame buffer starting address for the U-plane for the
first live video window
SR85-83 – Window 1 V-Plane FB Start Address............RW
23-20 Reserved
........................................ always reads 0
19-0 W1 V-Plane FB Start Address
When operating in planar mode, this field defines the
frame buffer starting address for the V-plane for the
first live video window
SR88-86 – Window 2 Frame Buffer Start Address ........RW
23-20 Reserved
........................................ always reads 0
19-0 Window 2 Frame Buffer Start Address
Frame buffer starting address for the second live
video window (packed YUV format only)
SR8A-89 – Window 2 Horizontal Scaling Factor ...........RW
15
W2 Horizontal Minify / Zoom Select
0
Zoom .....................................................default
1
Minify
Zoom Selected (Bit-15 = 0)
14
Reserved
13-0 W2 Horizontal Zoom Factor
Same format as for the first live video window as
defined in CR80 and CR81
Minify Selected (Bit-15 = 1)
14-13 W2 Tap
12-10 W2 Horizontal Minify Integer (Inverter)
9-0
W2 Horizontal Minify Factor
SR8C-8B – Window 2 Vertical Scaling Factor .............. RW
15
W2 Vertical Minify / Zoom Select
0
Zoom .................................................... default
1
Minify
14
W2 Vertical Filtering
0
Off
.................................................... default
1On
Zoom Selected (Bit-15 = 0)
13-0 W2 Vertical Zoom Factor
Same format as for the first live video window as
defined in CR82 and CR83
Minify Selected (Bit-15 = 1)
13-10 Reserved
9-0
W2 Vertical Minify Factor
SR90-8D – Window 2 Live Video Start .......................... RW
31-28 Reserved
........................................ always reads 0
27-16 W2 Vertical Starting Point
15-12 Reserved
........................................ always reads 0
11-0 W2 Horizontal Starting Point
SR94-91 – Window 2 Live Video End............................. RW
31-30 W2 Line Buffer Level Bits 8-7 (see SR95)
29-28 Reserved
........................................ always reads 0
27-16 W2 Vertical Ending Point
15-12 Reserved
........................................ always reads 0
11-0 W2 Horizontal Ending Point
SR95 – Window 2 Live Video Line Buffer Level ........... RW
7
Reserved
........................................ always reads 0
6-0
W2 Line Buffer Level Bits 6-0 (see SR91[31-30])
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