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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 137
GpmPort - RW – 8 bits - [IO_Reg: C52h]
Field Name Bits Default Description
GpmPort register
Isa_Misc - RW – 8 bits - [IO_Reg: C6Fh]
Field Name Bits Default Description
Reserved 5:0 00h
FlashRomEn 6 0b Flash program enable. This only applies if the chip is
strapped to have the ROM on the PCI bus . Set to 1 to enable
programming of the Flash ROM. During write cycles to the
system ROM space, ROMCS# is only asserted if this bit is
set 1.
Reserved 7 0b
Isa_Misc register: FlashRom Enable. This only applies if the chip is strapped to have the ROM on the secondary
PCI bus.
BIOSRAM_Index - RW – 8 bits - [IO_Reg: CD4h]
Field Name Bits Default Description
BiosRamIndex 7:0 00h BIOS RAM index register. This register selects one of the
256 bytes of BIOS RAM. Data in this RAM is preserved until
RSMRST# is asserted, or S5 power is lost.)
BiosRamIndex register
BIOSRAM_Data - RW – 8 bits - [IO_Reg: CD5h]
Field Name Bits Default Description
BiosRamData 7:0 00h Power management data register. This register provides the
read/write access to the indexed register.
BiosRamData register
PM_Index - RW – 8 bits - [IO_Reg: CD6h]
Field Name Bits Default Description
PM_Index 7:0 00h Power management index register. This register selects one
of the Power Management registers. (See section 2.3.3.2 for
more information.)
PM_Index register
PM_Data - RW – 8 bits - [IO_Reg: CD7h]
Field Name Bits Default Description
PM_Data 7:0 00h Power management data register. This register provides the
read/write access to the indexed register. (See section
2.3.3.2 for more information.)
PM_Data register
2.3.3.1.2 Client Management Registers (Accessed through C50h and C51h)
Register Name Offset Address
IdRegister 00h
TempStatus 02h
TempInterrupt 03h
I2Ccontrol 12h
Index13 13h