AMD 4.4.5 user manual Differences from Real Hardware

	AMD Confidential
User Manual	November 21st, 2008

The data value, e, is always one byte (two hex digits) in width. The device will log multiple messages for PCI configuration accesses that are greater than one byte in width. For example, a dword read of 0x11223344 from PCI configuration register 0x40 of device 7, function 1 on bus 0 would produce the following log messages:

PCI CONFIG READ Bus 0, Device 7, Function 1, Register 40, Data 44 PCI CONFIG READ Bus 0, Device 7, Function 1, Register 41, Data 33 PCI CONFIG READ Bus 0, Device 7, Function 1, Register 42, Data 22 PCI CONFIG READ Bus 0, Device 7, Function 1, Register 43, Data 11

Differences from Real Hardware

The Northbridge device differs from the real hardware in that the simulator does not support the debug hardware registers. The device also does not support memory- interleaving by node, though this will change in the near future. The device will differ in those things that are of a timing-related nature, such as setting of bus speeds. Full probe transactions are not modeled. Registers that deal with items outside of the testing of transfer protocols at the register level are not functional (buffer count registers, etc.). They are present and read/write able, but do not effect the simulation.

Chapter 7: Device Configuration 89