Intel S875WP1-E manual Super I/O, Video Memory Interface

Table 3.	Video Modes (continued)
1600x1200		60, 66	Supported	Supported	Supported	Supported
1600x1200		76, 85	Supported	Supported	Supported	–
3D Mode		Refresh Rate (Hz)	S875WP1-E 3D	Video Mode Support with Z Buffer Enabled
640x480		60,72,75,90,100	Supported	Supported	Supported	Supported
800x600		60,70,75,90,100	Supported	Supported	Supported	Supported
1024x768		60,72,75,90,100	Supported	Supported	Supported	Supported
1280x1024		43,60,70,72	Supported	Supported	–	–
1600x1200		60,66,76,85	Supported	–	–	–

Video Memory Interface

The memory controller subsystem of the Rage XL arbitrates requests from direct memory interface, the VGA graphics controller, the drawing coprocessor, the display controller, the video scalar, and hardware cursor. Requests are serviced in a manner that ensures display integrity and maximum CPU/coprocessor drawing performance.

The server board S875WP1-E supports an 8 MB (512Kx32bitx4 Banks) SDRAM device for video memory.

Super I/O

The SMSC LPC47M172 I/O Controller provides the following features:

•Low pin count (LPC) interface

•3.3 V operation

•One serial port and one serial port header

•One parallel port with Extended Capabilities Port (ECP) and Enhanced Parallel Port (EPP) support

•Serial IRQ interface compatible with serialized IRQ support for PCI systems

•PS/2-style mouse and keyboard interfaces

•Interface for one 1.2 MB, 1.44 MB, or 2.88 MB diskette drive

•Intelligent power management, including a programmable wake up event interface

•PCI power management support

The BIOS Setup program provides configuration options for the I/O controller.

Server Board Features 17