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Q: How does dma increase system concurrency?
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Which parallel port uses a dma channel?

ECP was designed to increase speed over EPP by using a DMA channel; therefore, when using ECP mode, you are using a DMA channel.


How would you define concurrency and recovery?

Concurrency is when computer science and the system works together. Recovery is taking the time to heal.


Which parallel port standard uses a DMA channel?

Extended Capabilities Port (ECP) as designed to increase speed over EPP by using a DMA channel; therefore, when using ECP mode, you are using a DMA channel.


Is it possible to use a dma controller if the system does not supports the interrupts?

You'd have to use DMA with polling, and thats usually not supported


What is concurrency in Unix?

the unix is a form of group in operating system


While looking around in the bios settings kaitlin set the pio and the dma settings to auto will this affect the system in any way explain?

pio and dma settings will not affect the system in any way.


Differentiate Optimistic concurrency control and pessimistic concurrency control?

concurrency control algorithm


What is busmastering?

bus mastering is a feature supported by many bus architectures that enables a device connected to the bus to initiate transactions. Also called "First-party DMA", to contrast it with Third-party DMA, the situation where the system DMA controller is actually doing the transfer.


What is the advantage of DMA transfer?

DMA allows devices to communicate with each other directly, instead of relying on the CPU to manage the transfers. This frees the CPU up to do other tasks, and increases system performance.


Are DMA channels part of a system resource?

Formally no, since 'resource' refers to something consumable, like RAM or CPU time. Rather, DMA channels are encountered to be a part of hardware infrastructure.


Name one system resource that a video card most likely will not need?

DMA channel


What is the main difficulty that a programmer must overcome an operating system for a real-time environment?

Understanding concurrency.