[COA] DMA

Question

In cycle stealing mode,the DMA gets control over ?

1. Data and address bus

2.Data and control bus

3.Address and control bus

4. None

Comments

My doubt here is that:-

As far as i know DMA takes control over all the buses,it needs address bus to communicate to memory,data bus for data transfer ,control bus for sending read/write signals to memory/Io.
So please see even if it is a valid question,as i am not sure.Correct me if i am wring anywhere

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it is system bus used in cycle stealing , no option for system bus hence option D

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​​​​​option D because DMA acquire system bus which is combination of all three buses

https://www.techopedia.com/definition/2307/system-bus

Answer 1

In cycle stealing mode,the DMA gets control over System Bus

so option D is correct .

Comments

no for it address and data bus.

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thank you :)

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@Bikram sir, But system bus consists of address lines data lines and control line?