AMD Sempron 10 Specifications download pdf (Page 8)

8 Conventions

41322 Rev. 3.84 August 2011

Revision Guide for AMD Family 10h Processors

Conventions

Numbering

• Binary numbers. Binary numbers are indicated by appending a “b” at the end, e.g., 0110b.

• Decimal numbers. Unless specified otherwise, all numbers are decimal. This rule does not apply

to the register mnemonics.

• Hexadecimal numbers. Hexadecimal numbers are indicated by appending an “h” to the end, e.g.,

45F8h.

• Underscores in numbers. Underscores are used to break up numbers to make them more

readable. They do not imply any operation. e.g., 0110_1100b.

• Undefined digit. An undefined digit, in any radix, is notated as a lower case “x”.

In order to define errata workarounds it is sometimes necessary to reference processor registers.

References to registers in this document use a mnemonic notation consistent with that defined in the

BIOS and Kernel Developer’s Guide (BKDG) for AMD Family 10h Processors, order# 31116. Each

mnemonic is a concatenation of the register-space indicator and the offset of the register. The

mnemonics for the various register spaces are as follows:

• IOXXX: x86-defined input and output address space registers; XXX specifies the byte address of

the I/O register in hex (this may be 2 or 3 digits). This space includes the I/O-Space Configuration

Address Register (IOCF8) and the I/O-Space Configuration Data Port (IOCFC) to access

configuration registers.

• FYxXXX: PCI-defined configuration space; XXX specifies the byte address of the configuration

specifies the register at function 3, address 40h. Each processor node includes five functions, 0

through 4.

• FYxXXX_xZZZZZ: Port access through the PCI-defined configuration space; XXX specifies the

byte address of the data port configuration register (this may be 2 or 3 digits) in hex; Y specifies

the function number; ZZZZZ specifies the port address (this may be 2 to 7 digits) in hex. For

example, F2x9C_x1C specifies the port 1Ch register accessed using the data port register at

function 2, address 9Ch. Refer to the BIOS and Kernel Developer’s Guide (BKDG) for

AMD Family 10h Processors, order# 31116 for access properties.

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AMD Sempron 10 Specifications Page 8