VT8601 Via, VT8601 Datasheet - Page 75

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

Port 228B-2288 – MC Y-Reference Address .................. RW
Port 228F-228C – MC U-Reference Address .................. RW
Port 2293-2290 – MC V-Reference Address ................... RW
Port 2297-2294 – MC Display Y-Address Offset ............ RW
Port 229B-2298 – MC Display U-Address Offset ........... RW
Port 229F-229C – MC Display V-Address Offset ........... RW
Port 22A0 – MC H Macroblock Count ........................... RW
Port 22A2 – MC V Macroblock Count............................ RW
Port 22A5-22A4 – MC Frame Buffer Y Length ............. RW
Revision 1.3 September 8, 1999
31-20 Reserved
31-20 Reserved
31-20 Reserved
31-20 Reserved
31-20 Reserved
31-20 Reserved
19-0 Y-Reference Start Address (quadword aligned)
19-0 U-Reference Start Address (quadword aligned)
19-0 V-Reference Start Address (quadword aligned)
19-0 Y Address Offset
19-0 U Address Offset
19-0 V Address Offset
15-0 Number of Pixels in a Y Frame
7-0
7-0
7HFKQRORJLHV ,QF
Y address offset (quadword aligned) of first display
pixel relative to the first pixel (top left hand corner)
of the picture.
U address offset (quadword aligned) of first display
pixel relative to the first pixel (top left hand corner)
of the picture.
V address offset (quadword aligned) of first display
pixel relative to the first pixel (top left hand corner)
of the picture.
Number of Horizontal Macroblocks
Number of Vertical Macroblocks
:H &
:H &R R QQHFW
QQHFW
........................................ always reads 0
........................................ always reads 0
........................................ always reads 0
........................................ always reads 0
........................................ always reads 0
........................................ always reads 0
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Port 22AB-22A8 – Color Palette Entries ........................ RW
Port 22B3-22B0 – SP BUF0 Pixel Start Address ........... RW
Port 22B7-22B4 – SP BUF1 Pixel Start Address ........... RW
Port 22BB-22B8 – SP BUF0 Command Start Address . RW
Port 22BF-22BC – SP BUF1 Command Start Address . RW
Port 22C1-22C0 – SP Y Display Offset ........................... RW
Port 22D0 – Digital TV Encoder Control ....................... RW
Port 22D3-22D1 – Digital TV Encoder CFC .................. RW
Graphics Accelerator PCI Bus Master Registers
VT8601 Apollo ProMedia