1. start from the command from the device information (input) connected to the computer. Those commands are sent, stored in main memory, or RAM (RAM) called the hotel to advise, arrange the commands in the order in which commands and by priority. By a duty to enter the commands each command with the CPU (CPU)2. when the CPU receives the command stored in main memory, then individually processing the incoming commands respectively. After processing is finished, it will send the results completion processing to the RAM again.3. RAM (RAM) will receive the output from the CPU processing in the format command, the hotel will send a command to the device address in the command processor. After the command is working to complete hotel information will be sent to notify the CPU that the command sent is already operating.
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