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Northbridge or host bridge for PowerPC CPU is an Integrated Circuit (IC) for interfacing PowerPC CPU with memory, and Southbridge IC. Some Northbridge also provide interface for Accelerated Graphics Ports (AGP) bus, Peripheral Component Interconnect (PCI), PCI-X, PCI Express, or Hypertransport bus. Specific Northbridge IC must be used for ...
A common example of a northbridge on a PowerPC platform is in Apple's older PowerPC-based computers like the iMac G5, which utilized an IBM CPC945 Northbridge chip. According to an Apple Developer note, The Power Mac G5's northbridge chip connected to a "Mid Bridge", which then connected to a south bridge. [9]
Pegasos 2nd version (G4), inner view Pegasos II motherboard Version 1.0 (2B3). The Pegasos II uses a Marvell Discovery II MV64361 northbridge, removing the need for the "April" chipset fix on the previous model, and additionally offers integrated Gigabit LAN and DDR support, and the ability to use the Freescale "G4" processor line.
The PowerPC 970, PowerPC 970FX, and PowerPC 970MP are 64-bit PowerPC CPUs from IBM introduced in 2002. Apple branded the 970 as PowerPC G5 for its Power Mac G5 . Having created the PowerPC architecture in the early 1990s via the AIM alliance , the 970 family was created through a further collaboration between IBM and Apple .
IBM PowerPC 604e 200 MHz Custom PowerPC CPU from the Wii video game console The Freescale XPC855T Service Processor of a Sun Fire V20z. The first implementation of the architecture was the PowerPC 601, released in 1992, based on the RSC, implementing a hybrid of the POWER1 and PowerPC instructions. This allowed the chip to be used by IBM in ...
The existing POWER and the upcoming PowerPC ISAs were deemed unsuitable by the AS/400 team so an extension to the 64-bit PowerPC instruction set was developed called PowerPC AS for Advances Series or Amazon Series. Later, additions from the RS/6000 team and AIM Alliance PowerPC were included, and by 2001, with the introduction of POWER4, they ...
The PowerPC 7xx is a family of third generation 32-bit PowerPC microprocessors designed and manufactured by IBM and Motorola (spun off as Freescale Semiconductor bought by NXP Semiconductors). This family is called the PowerPC G3 by Apple Computer (later Apple Inc. ), which introduced it on November 10, 1997.
The PowerPC 7448 "Apollo 8" is an evolution of the PowerPC 7447B announced at the first Freescale Technology Forum in June 2005. Improvements were a larger 1 MB L2 cache, a faster 200 MHz front side bus, and lower power consumption (18 W at 1.7 GHz). It was fabricated in a 90 nm process with copper interconnects and SOI. PowerPC 7448 users were: