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AMD-761 bảng dữ liệu(PDF) 36 Page - Advanced Micro Devices |
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AMD-761 bảng dữ liệu(HTML) 36 Page - Advanced Micro Devices |
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36 / 264 page ![]() 24 AMD-761™ System Controller Programmer’s Interface Chapter 2 AMD-761™ System Controller Software/BIOS Design Guide 24081D—February 2002 Preliminary Information Programming Notes Bit Definitions Configuration Address Register Type 1 (I/O:0CF8) Bit Name Function 31 Config_En Configuration Enable 0 = PCI configuration cycles are not generated. 1 = Accesses to the Configuration Data and Address registers are converted to configuration cycles on the PCI. 30–24 Reserved Reserved 23—16 PCI_Bus_Num PCI Bus Number This bit field defines which PCI bus in the system is referenced with this address. The AMD-761™ system controller logically implements two PCI buses. The main PCI bus normally enumerates as bus 0 and the AGP bus enumerates as bus 1. 15—11 Dev_Num Device Number This bit field defines which device is accessed in the system on the target PCI bus. This field is passed on directly to the AD wires undecoded. 10—8 Func_Num Function Number This bit field defines which function is accessed in a given device. This field is passed on directly to the AD wires undecoded. 7—2 Reg_Num Register Number This bit field defines which specific PCI register is accessed in the device and function specified above. 1—0 Reserved Reserved |
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