VT8601 Via, VT8601 Datasheet - Page 88

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

SR9F – VBI Control ......................................................... RW
SRA3-A0 - VBI Frame Buffer Address ........................... RW
SRA7-A4 – VBI Capture Start ......................................... RW
SRAB-A8 – VBI Capture End .......................................... RW
Revision 1.3 September 8, 1999
31-20 VBI Row Byte Offset
31-27 Reserved
26-16 VBI Vertical Start
15-11 Reserved
31-27 Reserved
26-16 VBI Vertical End
15-11 Reserved
19-0 VBI Start Address
10-0 VBI Horizontal Start
10-0 VBI Horizontal End
1-0
7
6
5
4
3
2
7HFKQRORJLHV ,QF
VBI Interrupt Status............................................RO
Reserved
VBI Bit-8
VBI IV Bit-8
VBI Interrupt
VBI Enable
VBI Data Format in Frame Buffer
:H &
:H &R R QQHFW
00 Every field data overwrite ......................default
01 Data in even/odd format
10 Every two field data write contiguous
11 -reserved-
0
1
0
1
QQHFW
Disable ...................................................default
Enable
Disable ...................................................default
Enable
........................................ always reads 0
........................................ always reads 0
........................................ always reads 0
........................................ always reads 0
........................................ always reads 0
-82
SRAD-AC – VBI Vertical Interrupt Position ................. RW
14-12 Dithering Mode
10-0 VINST[10-0]
15
11
Reserved
Capture CSC
000 Bypass dithering .................................... default
001 -reserved-
010 24 bpp dither to 16 bpp
011 24 bpp chop to 16 bpp
100 24 bpp dither to 15 bpp
101 24 bpp chop to 15 bpp
110 24 bpp dither to RGB8
111 24 bpp chop to RGB8
0
1
Disable................................................... default
Enable
........................................ always reads 0
VT8601 Apollo ProMedia
VGA Extended Registers