Chapter 2 - System Board
2-9
The onboard PCI-ISA bridge controller offers an interface for 2-mode or 3-mode floppy disk
drive. An LS-120 drive may also be connected to the system via the onboard FDD interface.
2.5
Video Function
The onboard video controller is capable not only of enhancing video display, but supporting 3-
D video applications as well. The video controller features the Accelerated Graphics Port
(AGP) design - the latest bus architecture that is considered to be the best solution for 3-D
applications. AGP offers greater bandwidth; thus, it is capable of speeding up the VGA bus in
order to meet the requirement of 3-D applications.
The board may come with 4-MB video memory. Larger video memory allows you to display
higher resolutions and more colors.
The following table lists the video resolutions supported by the onboard VGA:
Table 2-4
Supported Video Resolutions
Resolution
Refresh Rate
(Hz)
Horizontal
Freq. (KHz)
Pixel Clock
(MHz)
320 x 200
70
31.5
12.6
320 x 240
60
31.5
12.6
400 x 300
60
37.9
20.0
512 x 384
70
31.5
21.2
640 x 350
70
31.5
25.2
640 x 400
70
31.5
25.2
640 x 480
60
31.5
25.2
640 x 480
72
37.4
32.0
640 x 480
75
37.5
31.5
640 x 480
85
43.3
36.0
640 x 480
90
48.0
39.9
640 x 480
100
52.9
44.9
