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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 ...
Linux has run on IBM POWER systems since 2001, when a team created a new, 64-bit port for the Linux kernel to allow the OS to run on PowerPC processors. [3] The first system to fully support the 64-bit Linux kernel was IBM's POWER5, created in 2004. It was followed by POWER6 in 2007 and the current POWER7-based systems in 2010.
The northbridge was replaced by the system agent introduced by the Intel Sandy Bridge microarchitecture in 2011, which essentially handles all previous Northbridge functions. [10] Intel's Sandy Bridge processors feature full integration of northbridge functions onto the CPU chip, along with processor cores, memory controller, high speed PCI ...
This provides a convenient development environment for PowerPC-based real-time, embedded systems. Power.org has a Power Architecture Platform Reference (PAPR) that provides the foundation for development of Power ISA-based computers running the Linux operating system. PAPR was released in the fourth quarter of 2006.
When the first PowerPC products reached the market, they were met with enthusiasm. In addition to Apple, both IBM and the Motorola Computer Group offered systems built around the processors. Microsoft released Windows NT 3.51 for the architecture, which was used in Motorola's PowerPC servers, and Sun Microsystems offered a version of its ...
PearPC is a PowerPC platform emulator capable of running many PowerPC operating systems, including pre-Intel versions of Mac OS X, Darwin, and Linux on x86 hardware. [1] It is released under the GNU General Public License (GPL). It can be used on Windows, Linux, FreeBSD and other systems based on POSIX-X11.
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The first memory location the CPU tries to execute is known as the reset vector. In the case of a hard reboot, the northbridge will direct a code fetch request to the BIOS located on the system flash memory. For a warm boot, the BIOS will be located in the proper place in RAM and the northbridge will direct the reset vector call to the RAM. In ...