Intel 815 Manuel D’Utilisation
Intel® 815 Chipset: Graphics Controller PRM, Rev 1.0
R
336
17.4.
VTOTAL—Vertical Total Register
Address Offset:
6000Ch
Default Value:
00000000h
Access: Read/Write
Size: 32
Size: 32
bits
31
28 27
16
Reserved
Vertical Total Display Pixels
15
11
10
0
Reserved
Vertical Active Display Pixels
Bit Description
31:28
Reserved.
27:16
Vertical Total Display Pixels. Total vertical display lines. This 12-bit field provides a vertical total up to
4096 lines encompassing 2048 active display lines, top/bottom border lines and vertical retrace period.
4096 lines encompassing 2048 active display lines, top/bottom border lines and vertical retrace period.
15:11
Reserved.
10:0
Vertical Active Display Pixels. Active vertical display lines. This 11-bit field provides vertical active
display resolution up to 2048 lines. Note that the first vertical active display line always starts at 0.
display resolution up to 2048 lines. Note that the first vertical active display line always starts at 0.