This article at IBM's developerWorks website offers an overview of assembly language programming from a PowerPC perspective, and provides examples for three architectures: IA32 (x86), PowerPC, and PowerPC-64. The article assumes a basic understanding of computer design (for example, you should know that a processor has registers and can access memory) and of operating systems (system calls, exceptions,… process stacks). It contains information that will be useful to PowerPC programmers unfamiliar with assembly as well as programmers who already know IA32 assembly and want to broaden their knowledge.

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