82443LX Datasheet, PDF (33/144 Pages) Intel Corporation – INTEL 440LX AGPSET: 82443LX PCI A.G.P. CONTROLLER (PAC)

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INTEL 82443LX (PAC)
Table 8 shows the configuration space for Device 0. Shows PAC configuration space for Device #1.
Corresponding configuration registers for both devices are mapped as devices residing at the Primary PCI
bus (bus #0). The configuration registers layout and functionality for the Device 0 is implemented with a high
level of compatibility with a previous generation of PCIsets (i.e., 440FX). Configuration registers of PAC
Device 1 are based on the standard configuration space template of a PCI-to-PCI Bridge.
Address
Offset
00−01h
02−03h
04−05h
06−07h
08
0Ah
0Bh
0Dh
0Eh
10−13h
34h
50−51h
53h
55−56h
57h
58h
59−5Fh
60−67h
68h
6A-6Bh
6C-6Fh
70h
72h
90h
91h
92h
93h
A0−A3h
A4−A7h
Table 8. PCI Configuration Space—Device 0 (Host-to-PCI Bridge)
Register
Symbol
Register Name
Power Down Access
Default Value
VID
Vendor Identification
8086h
RO
DID
Device Identification
7180h
RO
PCICMD PCI Command Register
0006h
R/W
PCISTS PCI Status Register
0290h
RO,
R/WC
RID
Revision Identification
00h
RO
SUBC Sub-Class Code
00h
RO
BCC Base Class Code
06h
RO
MLT Master Latency Timer
00h
R/W
HDR Header Type
00h
RO
APBASE Aperture Base Address
00000008h
R/W
CAPPTR Capabilities Pointer
A0h
RO
PACCFG PAC Configuration
0s00_s000_00 R/W
00_0s00b
DBC Data Buffering Control
83h
R/W
DRT DRAM Row Type
0000h
R/W
DRAMC DRAM Control
01h
R/W
DRAMT DRAM Timing
00h
R/W
PAM[6:0] Programmable Attribute Map (7 registers)
00h
R/W
DRB[7:0] DRAM Row Boundary (8 registers)
01h
R/W
FDHC Fixed DRAM Hole Control
00h
R/W
DRAMXC DRAM Extended Mode Select
0000h
R/W
MBSC Memory Buffer Strength Control Register
55555555h
R/W
MTT Multi-Transaction Timer
00h
R/W
SMRAM System Management RAM Control
02h
R/W
ERRCMD Error Command Register
00h
R/W
ERRSTS0 Error Status Register 0
00h
R/WC
ERRSTS1 Error Status Register 1
00h
R/WC
RSTCTRL Reset Control Register
00h
R/W
ACAPID A.G.P. Capability Identifier
00100002h
RO
AGPSTAT A.G.P. Status Register
1F000203h
R/W
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