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DMA is included in a number of connections, because it lets a connected device (such as a camcorder, network card, storage device or other useful accessory or internal PC card) to transfer data between itself and the computer at the maximum speed possible, by using direct hardware access to read or write directly to main memory without any ...
Direct memory access (DMA) is a feature of computer systems that allows certain hardware subsystems to access main system memory independently of the central processing unit (CPU). [ 1 ] Without DMA, when the CPU is using programmed input/output , it is typically fully occupied for the entire duration of the read or write operation, and is thus ...
In computing, an input–output memory management unit (IOMMU) is a memory management unit (MMU) connecting a direct-memory-access–capable (DMA-capable) I/O bus to the main memory. Like a traditional MMU, which translates CPU -visible virtual addresses to physical addresses , the IOMMU maps device-visible virtual addresses (also called device ...
[58] [59] "Kernel Direct Memory access (DMA) Protection" only protects against attacks through Thunderbolt. Direct Memory Access is also possible through PCI Express. In this type of attack an attacker would connect a malicious PCI Express Device, [60] which can in turn write directly to the memory and bypass the Windows login. To protect again ...
In computing, remote direct memory access (RDMA) is a direct memory access from the memory of one computer into that of another without involving either one's operating system. This permits high-throughput, low- latency networking, which is especially useful in massively parallel computer clusters .
Since the channel normally has direct access to the main memory, it is also often referred to as a direct memory access (DMA) controller. In the most recent implementations, the channel program is initiated and the channel processor performs all required processing until either an ending condition or a program controlled interrupt (PCI). This ...
The Word DMA (WDMA) interface was the fastest method used to transfer data between the computer (through the Advanced Technology Attachment (ATA) controller) and an ATA device until Ultra Direct Memory Access (UDMA) was implemented.
Another classic development in computing systems is direct memory access (DMA), in which a device can access main memory directly while the CPU is free to perform other tasks. In a network with "remote direct memory access" ( RDMA ), the sending NIC uses DMA to read data in the user-specified buffer and transmit it as a self-contained message ...