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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 ...
[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 .
This makes providing direct access to the computer hardware difficult, because if the guest OS tried to instruct the hardware to perform a direct memory access (DMA) using guest-physical addresses, it would likely corrupt the memory, as the hardware does not know about the mapping between the guest-physical and host-physical addresses for the ...
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 ...
Direct memory access (DMA) can greatly increase the efficiency of a polling-based system, and hardware interrupts can eliminate the need for polling entirely. Multitasking operating systems can exploit the functionality provided by hardware interrupts, whilst hiding the complexity of interrupt handling from the user.
So DMA channels are ISA-specific, right? In other words they would not be applicable to PCI, since any PCI device can bus-master? Also, what is the "Direct Memory Access Controller" shown with Channel 4 in msinfo32.exe on Windows? -- AzzAz 20:27, 28 February 2008 (UTC) No, DMA is a generic concept. PCI bus-mastering is a type of DMA.