Compaq W4000 User Manual

Chapter 4 System Support
T
Not required
Figure 4-3. PCI Configuration Space Mapping
Data required by PCI protocol
he register index (CF8h, bits <7..2>) identifies the 32-bit location within the configuration space
ach 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
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.
31 24 23 16 15 8 7 0
Ex
p
ansion ROM Base Address
Device-Specific Area
Int. Line Int. Pin Brid
g
e Control
Register
Index
FCh
3Ch
38h
34h
40h
24 23 16 15 8 7 0
Reserved
Reserved
Device-Specific Area
Int. Line Int. Pin Min. GNT in. Lat.
I/O Limit
2Ch
30h
Subs
y
stem Vendor ID Subs
y
stem ID
Ex
p
ansion ROM Base Address
Devi
PCI Configuration Space Type 0
E
Configuration
Space
Header
PCI Configuration Space Type 1
Cla
Status
BIST Hd
Sub. Bus # 2
n
d
Lat.Tmr
ondar
y
Status
1Ch
10h
Bas
Status
IST Hdr. T
Class
Base Address Regist s er
ss Code
Command
Revision ID
Vendor ID Device ID
Reserved
Prefetchable Limit U
pp
er 32 Bits
Prefetch. Mem. Limit Prefetch. Mem. Base
Prefetchable Base U
pp
er 32 Bits
Line Size Lat. Timer r. T
yp
e
Pri. Bus # Sec. Bus #
00h
Register
Index
04h
08h
0Ch
2Ch
30h
FCh
18h
28h
3Ch
38h
34h
40h
I/O Base U
pp
er 16 Bits
Upper 16 Bits
24h
20h
Memor
y
Base Memor
y
Limit
I/O Base I/O Limit Sec
e Address Registers
00h
04h
08h
0Ch
10h
28h
Command
31
Revision ID
Vendor ID ce ID
Card Bus CIS Pointer
Line Size Lat. Timer B
yp
e
Code
M
Compaq Evo and Workstation Personal Computers
Featuring the Intel Pentium 4 Processor
Second Edition – January 2003
4-6
PCI Device Vendor ID Device ID
82845 MCH:
Memory Controller
AGP Bridge
8086h
8086h
1A30h
1A31h
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

Compaq W4000 Specifications

General

Brand	Compaq
Model	W4000
Category	Desktop
Language	English