Table 10. Pci Bus Configuration Ids; Bit, 33-Mhz Pci Subsystem; Video Controller - Intel S875WP1LX Specification

S875WP1-E TPS
3.8.1

32-bit, 33-MHz PCI Subsystem

All 32-bit, 33-MHz PCI I/O for the Intel Server Board S875WP1-E is directed through the Intel
82801ER I/O Controller Hub (ICH5-R). The PCI bus supports the following embedded devices
and connectors:
34 2D/3D Graphics Accelerator: ATI Rage XL Video Controller
35 SATA controller: Promise Technology PDC20319
•
Three PCI Slots
Each of the embedded devices listed above will be allocated a GPIO to disable the device.
3.8.1.1 Device IDs (IDSEL)
Each device under the PCI hub bridge has its IDSEL signal connected to one bit of AD[31:16],
which acts as a chip select on the PCI bus segment in configuration cycles. This determines a
unique PCI device ID value for use in configuration cycles. The following table shows each IDSEL
value for the PCI bus devices and the corresponding device description.
IDSEL Value
16
17
18
22
23
3.8.2

Video Controller

The Intel Server Board S875WP1-E provides an ATI Rage XL PCI graphics accelerator, along
with 8 MB of video SDRAM and support circuitry for an embedded SVGA video subsystem. The
ATI Rage XL chip contains a SVGA video controller, clock generator, 2D and 3D engine, and
RAMDAC in a 272-pin PBGA.
The SVGA subsystem supports a variety of modes, up to 1600 x 1200 resolution in 8/16/24/32
bpp modes under 2D, and up to 1024 x 768 resolution in 8/16/24/32 bpp modes under 3D. It
also supports both CRT and LCD monitors up to 100 Hz vertical refresh rate.
The server board provides a standard 15-pin VGA connector and supports disabling of the on-
board video through the BIOS Setup menu or when a plug-in video card is installed in the AGP
slot or any of the PCI slots.
3.8.2.1 Video Modes
The Rage XL chip supports all standard IBM VGA modes. The following table shows the 2D/3D
modes supported for both CRT and LCD, as well as various display resolution, refresh rates,
and color depths.
Revision 4.0

Table 10. PCI Bus Configuration IDs

Device
PCI slot 1 (closest to AGP connector)
PCI slot 2 (middle slot)
PCI slot 3 (closest to left edge of board)
ATI Rage XL Video Controller
ATA-100 controller Promise Technology PDC20319
Functional Architecture
31