When we pass any data to memory, microprocessor and Operating System how interact?

Question

How data pass through keyboard to memory, in memory which proccess are going on till display it .

Answer 1

The each key or combination of keys on the keyboard produces a code of 8 bits (This is called ASCII code), which the operating system or other software recognizes. If you are using the command prompt, strings of characters can be used to issue instructions directly to the operating system. Within software such as Word, two things happen.

1. The characters and commands (Space, Tab, etc.) that you type are stored in RAM according to the software instructions passing through the CPU. Depending on what you're doing, sets of instructions are constantly being uploaded from the hard drive to memory to the processor. The content is then saved to a temporary file on the hard drive when you click "Save". Word also auto-saves periodically. When you close the document, it is erased from memory (although the path back to it remains in one of Window's many Most Recently Used lists) and the temporary file becomes 'permanent' (it can still be deleted or erased).

2. The code for what you're typing is also sent to the graphics / video chip which displays it on your monitor.

Answer 2

Well thats not a simple answer. With software, programs are the computer's instructions to move and manipulate the data. The processor completes the instructions and all active software is stored in RAM until the program is closed or the file is saved then the data as sent to the hard drive for storage. Think of it as a human brain. The stuff you thinking about is in your short term memory (ram) and the things you remember from the past are in your long term memory (hard drive)