Format of PCI Configuration for Intel 82371FB/82371SB Function 0 (ISA Bridge): 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 SeeAlso: #00873,#01214,#01215,#01064,#01083,#01108,#01098