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HOW CENTRAL PROCESSING SYSTEM WORKS, WORKING OF CPU
The ALU and the CU of a computer system
are jointly known as the central processing unit. CPU uses
registers to store information temporarily.
For e.g we need to process 6 values with each
other. CPU has instruction decoder which is like a guide to
CPU. Above you can see RAM and ROM. RAM is temporary, read
write, volatile memory whereas the ROM is read only,
permanent and non volatile memory.
Both these memories are primary memories.
Data Bus is 8 bit and Address Bus is 16 bits.
While executing any
instruction CPU performs these steps:
1.CU (Control Unit) gets instruction from
Primary Memory (RAM/ROM). 2.CU
(Control Unit) decides what instruction means and directs
data to ALU (Arithmetic Logic unit).
3. ALU (Arithmetic logic unit) performs
Actual Operation on the Data. 4.The
Result of this above operation is then stored into a
register temporarily.
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