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©2008 Advanced Micro Devices, Inc.
SMBus Module and ACPI Block (Device 20, Function 0)
AMD SB600 Register Reference Manual Proprietary Page 98
Register Name Configuration Offset
IDE_GPIO_In A4h
GPIO_48_47_46_37_Cntrl A6h
GPIO_12_to_4_Cntrl A8h
SATA_Cntrl ACh
SataIntMap AFh
MSI_Mapping_Capability B0h
PcilntGpio BCh
UsbIntMap BEh
IoDrvSth C0h
I2CbusConfig D2h
I2CCommand D3h
I2CShadow1 D4h
I2Cshadow2 D5h
I2CBusRevision D6h
MSI_Weight E0h
AB_REG_BAR F0h
WakeIoAddr F4h
MwaitID F6h
MwaitSts F7h
ExtendedAddrPort F8h
ExtendedDataPort FCh
VendorID - R - 16 bits - [PCI_Reg: 00h]
Field Name Bits Default Description
VendorID 15:0 1002h Vendor ID
Vendor ID register: Vendor Identification
DeviceID - R - 16 bits - [PCI_Reg: 02h]
Field Name Bits Default Description
DeviceID 31:16 4385h Device ID
Device ID register: Device Identification Number
Command- RW - 16 bits - [PCI_Reg: 04h]
Field Name Bits Default Description
I/O Space 0 1b This bit controls a device’s response to IO space accesses. A
value of 1 enables it and a value of 0 disables it. Since this
module does claim certain legacy IO cycles, this bit is default
to 1.
Memory Space 1 1b This bit controls a device’s response to memory space
accesses. A value of 1 enables it and a value of 0 disables it.
Since this module does claim certain memory cycles if BIOS is
strapped to the PCI bus, this bit is default to 1.
Bus Master 2 0b A value of 0 disables the device from generating PCI
accesses. A value of 1 allows it to behave as a bus master.
ACPI/SMBus does not have PCI master and so it is always 0.
[Read-only]
Special Cycle 3 0b A value of 0 causes the devices to ignore all special cycle
operations. A value of 1 allows the device to monitor Special
Cycle operations. This module does not respond to special
cycle and so this is hardcoded to 0
Memory Write &
Invalidate Enable
4 0b This bit is an enable bit for using the Memory Write and
Invalidate command. This module will not generate this
command and so it is always 0. [Read-only]
VGA Palette Snoop 5 0b This bit controls how VGA compatible and graphics devices
handle accesses to VGA pallette registers. This does not
apply to this module and so it is always 0. [Read-only]