PowerPC

PowerPC is a RISC microprocessor architecture created by the 1991 Apple–IBM–Motorola alliance, known as AIM. Originally intended for personal computers, PowerPC CPUs have since become popular embedded and high-performance processors as well. PowerPC was the cornerstone of AIM's PReP and Common Hardware Reference Platform initiatives in the 1990s, but the architecture found the most success in the personal computer market in Apple's Macintosh lines from 1994 to 2006 (before Apple's transition to Intel).
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<processor, standard> (PPC) A RISC microprocessor designed to meet a standard which was jointly designed by Motorola, IBM, and Apple Computer (the PowerPC Alliance). The PowerPC standard specifies a common instruction set architecture (ISA), allowing anyone to design and fabricate PowerPC processors, which will run the same code. The PowerPC architecture is based on the IBM POWER architecture, used in IBM's RS/6000 workstations. Currently IBM and Motorola are working on PowerPC chips.
The PowerPC standard specifies both 32-bit and 64-bit data paths. Early implementations were 32-bit (e.g. PowerPC 601); later higher-performance implementations were 64-bit (e.g. PowerPC 620). A PowerPC has 32 integer registers (32- or 64 bit) and 32 floating-point (IEEE standard 64 bit) floating-point registers.
The POWER CPU chip and PowerPC have a (large) common core, but both have instructions that the other doesn't. The PowerPC offers the following features that POWER does not:
Support for running in little-endian mode.
Addition of single precision floating-point operations.
Control of branch prediction direction.
A hardware coherency model (not in Book I).
Some other floating-point instructions (some optional).
The real time clock (upper and lower) was replaced with the time base registers (upper and lower), which don't count in sec/ns (the decrementer also changed).
64-bit instruction operands, registers, etc. (in 64 bit processors).
See also PowerOpen, PowerPC Platform (PReP).
IBM PPC info.
gopher://info.hed.apple.com/, "Apple Corporate News/" (press releases), "Apple Technologies/" and "Product Information/". gopher://ike.engr.washington.edu/, "IBM General News/", "IBM Product Announcements/", "IBM Detailed Product Announcements/", "IBM Hardware Catalog/".
Usenet newsgroups: news:comp.sys.powerpc, news:comp.sys.mac.hardware.
["Microprocessor Report", 16 October 1991].
(1994-09-30)

PowerPC

powerpc
Một loại vi xử lý RISC do hãng Motorola chế tạo, đang cạnh tranh với chip Intel Pentium
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PERFORMANCE OPTIMIZATION WITH ENHANCED RISC-PERFORMANCE COMPUTING. POWERPC