Programming; Upgrading Igp-Based Graphics; Table 6-2. 815E-Based Graphics - HP Compaq D315 Technical Reference Manual

6.4

PROGRAMMING

The IGP's integrated graphics processing unit is configured using PCI configuration registers
listed in Table 6-2.
Table 6-2. 815E-Based Graphics Controller PCI Configuration Registers
Graphics Processing Unit PCI Configuration Registers (Device 0, Function 0, Bus 1)
PCI
Config.
Addr. Register
00, 01h Vendor ID
02, 03h Device ID
04, 05h Command
06, 07h Status
08h Revision ID
09-0Bh Class Code
0Eh Header Type
0Fh BIST
10-13h Memory Range Addr.
14-17h Mem. Map Range Addr.
2C, 2Dh Subsys. Vendor ID
NOTE:
[1] D315, = 01A0h; d325, = 01F0h
[2] Refer to NVidia documentation for detailed register descriptions and values.
The GPU is controlled through memory-mapped registers by the appropriate software driver.
6.5

UPGRADING IGP-BASED GRAPHICS

The IGP-based graphics subsystem of these systems is upgradeable by installing an AGP graphics
card into the AGP slot. The upgrade procedure is as follows:
1. Shut down the system through the operating system.
2. Unplug the power cord from the rear of the system unit.
3. Remove the chassis cover.
4. Install the AGP card into the AGP slot.
5. Replace the chassis cover.
6. Reconnect the power cord to the system unit.
7. Power up the system unit.
The BIOS will detect the presence of the AGP card and disable the GPU of the IGP.
Table 6-2.
PCI
Reset Config.
Value Addr.
10DEh 2E, 2Fh
[1] 30-33h
[2] 34h
[2] 3Ch
[2] 3Dh
[2] 3Eh
[2] 3Fh
[2] DC, DDh
[2] DE, DFh
[2] E0, E1h
[2] E2-FFh
Compaq D315 and hp d325 Personal Computers
Featuring the AMD Athlon XP Processor
Second Edition - April 2003
Technical Reference Guide
Register
Subsystem ID
Vid. BIOS Base Addr.
Capabilities Pointer
Interrupt Line
Interrupt Pin
Min. Grant
Max. Latency
Pwr. Mgmt. Capabilities
Pwr. Mgmt. Capabilites
Pwr. Mgmt. Control
Reserved
Reset
Value
[2]
[2]
[2]
[2]
[2]
[2]
[2]
[2]
[2]
[2]
[2]
6-5