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Q. What is System Prompt?
On loading (or Switching to) DOS, the screen displays C :\>, C>, A :\> or a similar message. The message displayed by DOS is called DOS Prompt or System Prompt. This prompt serves two functions:
1. It point towards that DOS is ready to accept a command from the keyboard.
2. It displays the default drive name. For example, C>, C :\>, indicates that drive C: is a default drive. DOS will use the default drive for every file operations if the user does not identify any drive name with commands.
Draw and illustrate the block diagram of DMA controller. Also discuss the various modes in which DMAC works. Direct memory access (DMA) is a process in that an external device
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