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O que (quem) é memory-mapped - definição
Memory-mapped I/O
I/O METHOD BETWEEN THE CPU AND PERIPHERALS WHICH USES THE SAME ADDRESS SPACE TO ADDRESS BOTH MEMORY AND I/O DEVICES; THE MEMORY AND REGISTERS OF THE I/O DEVICES ARE MAPPED TO ADDRESS VALUES
Port-mapped I/O; Memory-mapped IO; MMIO; I/O methods; I/O address; Memory mapped IO; Port IO; Port I/O; Memory mapped I/O; Port mapped I/O; Port mapped IO; PMIO; I/O Address; Io port; I/O port; IO address; IO port; Memory-mapped io; I/o port; I/O Port; IO Port; I/O ports; Incomplete decoding; Incomplete address decoding; Partial address decoding; Partial decoding; Memory-mapped I/O
Memory-mapped I/O (MMIO) and port-mapped I/O (PMIO) are two complementary methods of performing input/output (I/O) between the central processing unit (CPU) and peripheral devices in a computer. An alternative approach is using dedicated I/O processors, commonly known as channels on mainframe computers, which execute their own instructions.
memory mapped I/O
I/O METHOD BETWEEN THE CPU AND PERIPHERALS WHICH USES THE SAME ADDRESS SPACE TO ADDRESS BOTH MEMORY AND I/O DEVICES; THE MEMORY AND REGISTERS OF THE I/O DEVICES ARE MAPPED TO ADDRESS VALUES
Port-mapped I/O; Memory-mapped IO; MMIO; I/O methods; I/O address; Memory mapped IO; Port IO; Port I/O; Memory mapped I/O; Port mapped I/O; Port mapped IO; PMIO; I/O Address; Io port; I/O port; IO address; IO port; Memory-mapped io; I/o port; I/O Port; IO Port; I/O ports; Incomplete decoding; Incomplete address decoding; Partial address decoding; Partial decoding; Memory-mapped I/O
<architecture> The use of the same instructions and bus to
communicate with both main memory and input/output
devices. This is in contrast to processors that have a
separate I/O bus and special instructions to access it.
The I/O devices are addressed at certain reserved address
ranges on the main memory bus. These addresses cannot
therefore be used for RAM. Motorola and Mostec
architectures, among others, use memory mapped I/O.
Video cards and other cards with on-board memory might be
accessed in this way though the term applies not just to
devices containing memory but to any device connected to the
memory bus. Accessing the devices usually consists of reading
and writing certain built-in registers though sometimes the
mere presence of a particular address can trigger the device.
(1997-04-14)
Memory-mapped file
SEGMENT OF VIRTUAL MEMORY THAT HAS BEEN ASSIGNED A DIRECT BYTE-FOR-BYTE CORRELATION WITH SOME PORTION OF A FILE OR FILE-LIKE RESOURCE
Memory-mapped files; Memory mapped files; Memory Mapped Files; Memory mapped file; Mem-mapped file
A memory-mapped file is a segment of virtual memory that has been assigned a direct byte-for-byte correlation with some portion of a file or file-like resource. This resource is typically a file that is physically present on disk, but can also be a device, shared memory object, or other resource that the operating system can reference through a file descriptor.
