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Hardware interrupts:
Hardware interrupts-from I/O devices, processor, memory Software interrupts-produced by a program.
Direct Memory Access (DMA)
Interrupt or Polling driven I/O incurs considerable overhead
Transfer high amounts of data at high speed without continuous intervention by the processor
DMA controller keeps track of memory locations, directly transfers to memory (using the bus)
independent of the processor
Special control circuit needed in the I/O device interface which is called a DMA controller
When will the current screen processing terminates? A current screen processing terminates when control reaches either a Leave-screen or the end of PAI.
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Design a serial 2’s complementer with a shift register and a flip-flop
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#what is nicol prism.its construction and working
Discuss the mount and unmount system calls. The privileged mount system call is used to join a file system to a directory of another file system; the unmount system call detach
Now add layout cells into which you will add text about travel locations. 1. In Objects panel, click the Draw Layout Cell icon and move the pointer to layout table you just dre
Determine the block diagram of bcd adder To add 0110 to binary sum, we use a second 4-bit binary adder. The two decimal digits, together with input-carry, are first added in to
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