Make your own free website on Tripod.com
Up ] Docs Home ]

Format of PCI Configuration for Intel 82371FB/82371SB Function 0 (ISA Bridge)

Back ] Next ]

Offset Size Description

00h

64 BYTEs

header (see #00878
(vendor ID 8086h, device ID 122Eh/7000h) 
(revision ID 00h = 82371SB step A-1) 
(revision ID 01h = 82371SB step B-0)

40h

12 BYTEs

reserved

4Ch

BYTE

ISA I/O Controller Recovery Timer (see #01087)

4Dh

BYTE

reserved

4Eh

BYTE

X-Bus Chip Select Enable (see #01089)

4Fh

BYTE

(82371SB) X-Bus Chip Select Enable High (see #01102)
bit 0 : I/O APIC enabled

4Fh

BYTE

(82371FB) reserved

50h

16 BYTEs

reserved

60h

4 BYTEs

PCI IRQ Route Control (see #01076)

64h

5 BYTEs

reserved

69h

BYTE

top of memory (see #01216)

6Ah

WORD

miscellaneous status (see #01217)

6Ch

4 BYTEs

reserved

70h

BYTE

motherboard IRQ Route Control 0 (see #01218)

71h

BYTE

(82371FB) motherboard IRQ Route Control 1 (see #01218)

72h

4 BYTEs

reserved

76h

2 BYTEs

motherboard DMA control (see #01219)

78h

WORD

programmable chip select control (see #01220)

7Ah

6 BYTEs

reserved

80h

BYTE

(82371SB) APIC Base Address Relocation (see #01078)

81h

BYTE

reserved

82h

BYTE

(82371SB) Deterministic Latency Control (see #01221)

83h

29 BYTEs

reserved

A0h

BYTE

SMI Control (see #01222)

A1h

BYTE

reserved

A2h

WORD

SMI Enable (see #01080)

A4h

DWORD

System Event Enable (SEE) (see #01081)

A8h

BYTE

Fast-Off Timer (in minutes, PCICLKs, or milliseconds)
value is count less one; timer must be stopped before changing its value

A9h

BYTE

reserved

AAh

WORD

SMI Request (see #01082)

ACh

BYTE

Clock Scale STPCLK# Low Timer
STPCLK# stays low for 1+1056*(value+1) PCICLKs

ADh

BYTE

reserved

AEh

BYTE

Clock Scale STPCLK# High Timer
STPCLK# stays high for 1+1056*(value+1) PCICLKs

AFh

81 BYTEs

reserved

See Also:

#00873,#01214,#01215,#01064,#01083,#01108,#01098