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One of the major improvements the PCI Local Bus had over other I/O architectures was its configuration mechanism. In addition to the normal memory-mapped and I/O port spaces, each device function on the bus has a configuration space, which is 256 bytes long, addressable by knowing the eight-bit PCI bus, five-bit device, and three-bit function numbers for the device (commonly referred to as the ...
Finally, PCI configuration space provides access to 256 bytes of special configuration registers per PCI device. Each PCI slot gets its own configuration space address range. The registers are used to configure devices memory and I/O address ranges they should respond to from transaction initiators.
The distinction can be arbitrary between a computer bus, often closer in space, and larger telecommunications networks. Many device interfaces or protocols (e.g., SATA, USB, SAS , PCIe ) are used both inside many-device boxes, such as a PC, and one-device-boxes, such as a hard drive enclosure .
This allows it to scan the PCI configuration space to find the correct device and BARs it needs to use. To prevent this scan, and in case of two identical cards in the system, the BIOS passes the PFA (bus/device/function) to the initialization routine in AX, and the card select number (CSN) for ISA option ROMs is passed in BX.
PCI Express Mini Card (also known as Mini PCI Express, Mini PCIe, Mini PCI-E, mPCIe, and PEM), based on PCI Express, is a replacement for the Mini PCI form factor. It is developed by the PCI-SIG . The host device supports both PCI Express and USB 2.0 connectivity, and each card may use either standard.
After AST left the Mac market, the rights to both were sold to Orange Micro. Orange Micro's OrangePC series of cards were the spiritual successor to the Mac86 and Mac286. These cards provided support for 386, 486, and Pentium processors, up to a 400 MHz AMD K6-2 processor in the final model. Orange Micro also released the PCfx!, a cut down ...
In computing, a devicetree (also written device tree) is a data structure describing the hardware components of a particular computer so that the operating system's kernel can use and manage those components, including the CPU or CPUs, the memory, the buses and the integrated peripherals.
Configuration space may refer to: . Configuration space (physics) Configuration space (mathematics), the space of arrangements of points on a topological space PCI configuration space, the underlying way that the Conventional PCI, PCI-X and PCI Express perform auto configuration of the cards inserted into their bus