In computing how does the C.P.U write to a memory location ?

Question

My son has started using computers at his school andcame home and asked me but i;ve not got a clue

Answer 1

Nice Question! well first u have to know each cell of memory have its own unique address. CPU just have to get the address and order the writer device to write the given data(this data is given by processor by processing).
Lets take an imaginary example for ur child, assume there are thousands of elecric bulbs or candles. I give u order "Turn Off D5C3 number bulb. Here D is column name and C is Row name and the number after them are the number of column like ms excel.
On Hard Disk::
Hard disk is a circular platter that contains megnatic cells on it, when processor goes to write data on some location, The Head of Hard searches for that address or cell, and stands on it and waits for incoming data that have to write. When data comes it makes poles of megnate on Hard Disk plate. (this is technical, Hard disk platter contains megnatic platter, this platter charged with either North pole or South Pole(just like megnate). North Pole is treated as 0 and south pole is 1. To write data on head makes eletric charge on cell and makes it to charge it with N or S pole which required.

In RAM:: RAM is cellular representation of memory same like MS Excel. In RAM everytime electric current flows. If the electric power in a cell is less than 50% it treated as '0' and if more than 50% than it treated as '1'. When cpu goes to write data, it charges the Row of Required address in above ex this is C5. After that it charges the Column D4. with this combination a cell emerges in memory. Then processor decides the charge for that cell either 50% or more than 50%.

Give ur child example of MS excel. First select a row then a Column and the cell that emerges is the destination address to give electric charge or Megnatic pole (S or N).


Hope this helps u!
Good Bye n Have
a nice day!

Answer 2

If my son asks the same question, I will answer that CPU did not write anything to a memory.
Imagine this: The writer writes letter, end give it to postman to deliver. CPU acts only a postman who deliver the mail to its address. And the writer was the software.

Answer 3

Tell him to look in his textbook; it's probably a test queston that he should be looking up himself.

Answer 4

ask an expert