Compaq Deskpro Workstation AP230 - Table 4-2. System Board Pci D

Technical Reference Guide
Compaq Deskpro Personal Computers
Third Edition - April 2001
4-5
Not required
The register index (CF8h, bits <7..2>) identifies the 32-bit location within the configuration space
of the PCI device to be accessed. All PCI devices can contain up to 256 bytes of configuration
data (Figure 4-3), of which the first 64 bytes comprise the configuration space header.
Figure 4-3. PCI Configuration Space Mapping
Each PCI device is identified with a vendor ID (assigned to the vendor by the PCI Special Interest
Group) and a device ID (assigned by the vendor). The device and vendor IDs for the devices on
the system board are listed in Table 4-2.
Table 4-2. System Board PCI Device Identification
Table 4-2.
System Board PCI Device Identification
PCI Device Vendor ID Device ID
82815 GMCH:
Memory Controller
AGP Bridge
Direct AGP Controller
8086h
8086h
8086h
1130h
1131h
1132h
82801 ICH2:
PCI Bridge
LPC Bridge
EIDE Controller
USB I/F #2
SMBus Controller
AC97 Audio Controller
Network Interface Controller
8086h
8086h
8086h
8086h
8086h
8086h
8086h
244Eh
2440h
244Bh
2444h
(Hidden)
2445h
2449h
Data required by PCI protocol
Configuration
Space
Header
PCI Configuration Space Type 1
Class Code
Command
31 24 23 16 15 8 7 0
Revision ID
Vendor ID
Status
Device ID
Ex
p
ansion ROM Base Address
R
eserved
Prefetchable Limit Upper 32 Bits
Prefetch. Mem. Limit Prefetch. Mem. Base
Prefetchable Base U
pp
er 32 Bits
Device-Specific Area
Line Size
Lat. Timer
Int. Line
Int. Pin
BIST
Hdr. Ty
p
e
P
ri. Bus #
Sec. Bus #
Sub. Bus #
2
nd
Lat.Tmr
00h
Register
Index
04h
08h
0Ch
2Ch
30h
FCh
18h
28h
3Ch
38h
34h
40h
Bridge Control
I/O Base U
pp
er 16 Bits
I/O Limit U
pp
er 16 Bits
24h
20h
Memor
y
Base Memor
y
Limit
I
/O Base
I/O Limit
Secondary Status
1Ch
10h
Base Address Registers
00h
Register
Index
04h
08h
0Ch
2Ch
30h
FCh
10h
28h
3Ch
38h
34h
40h
Command
31 24 23 16 15 8 7 0
Revision ID
Vendor ID
Status
Device ID
Reserved
Reserved
Ex
p
ansion ROM Base Address
Subs
y
stem Vendor ID Subs
y
stem ID
Card Bus CIS Pointer
Device-Specific Area
Line Size
Lat. Timer
Int. Line
Int. Pin
Min. GNT
Min. Lat.
BIST
Hdr. Ty
p
e
Class Code
Base Address Registers
PCI Configuration Space Type 0