It is related to computer and specially operating system
2007-09-17 08:07:28 · 4 answers · asked by Anonymous in Computers & Internet ➔ Hardware ➔ Other - Hardware
CPU usually has priority, you don;t want to make it wait for a slow I/O device. All I/O devices are slow compared to the CPU.
2007-09-17 08:18:33 · answer #1 · answered by Computer Guy 7 · 0⤊ 0⤋
One will be processed first, then the other. That is why the interrupts were developed. DMA, means the device sends data across the bus, without waiting for the CPU to recognize it.
2007-09-17 10:40:09 · answer #2 · answered by ? 7 · 0⤊ 0⤋
the I/O devices send their requests to the DMA controller that shares the bus with the CPU by the means of channels and flag indicated line, once the bus line is occupied the other parties waits their turn to upload data, pipe lining and channeling also apply in most nodern technologies
2007-09-17 08:37:08 · answer #3 · answered by ThunderCyclon 3 · 0⤊ 0⤋
one of them gets "a busy signal".
You cant have more than one signal on the bus at a time.
2007-09-17 08:55:34 · answer #4 · answered by Anonymous · 0⤊ 0⤋