Motorola MPC8260 User Manual

Part IV-iv

MOTOROLA

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PowerPC Microprocessor Family: The ProgrammerÕs Reference Guide 
(Motorola order #: MPCPRG/D) is a concise reference that includes the register 
summary, memory control model, exception vectors, and the PowerPC instruction 
set.

For a current list of PowerPC documentation, refer to the world-wide web at 
http://www.mot.com/PowerPC.

This document uses the following notational conventions:

Bold entries in Þgures and tables showing registers and parameter 
RAM should be initialized by the user. 

Instruction mnemonics are shown in lowercase bold. 

Italics indicate variable command parameters, for example, bcctrx.
Book titles in text are set in italics.

0x0

PreÞx to denote hexadecimal number

0b0

PreÞx to denote binary number

rA, rB

Instruction syntax used to identify a source GPR

rD

Instruction syntax used to identify a destination GPR

REG[FIELD]

Abbreviations or acronyms for registers or buffer descriptors are 
shown in uppercase text. SpeciÞc bits, Þelds, or numerical ranges 
appear in brackets. For example, MSR[LE] refers to the little-endian 
mode enable bit in the machine state register.

x

In certain contexts, such as in a signal encoding or a bit Þeld, 
indicates a donÕt care. 

Indicates an undeÞned numerical value

NOT logical operator

&

AND logical operator

|

OR logical operator

Table i contains acronyms and abbreviations used in this document. Note that the meanings
for some acronyms (such as SDR1 and DSISR) are historical, and the words for which an
acronym stands may not be intuitively obvious.