RAM
so as to infom the processor of what it ought to do
A microprocessor cant work as a stand alone unit.to make it work we have to interface memory and input out devices and so the PCB of microprocessor based system will be larger.Microcontroller consists of processor,memory and peripherals on a single chip and so needs no interfacing.Microcontroller can be programmed for any specific task.
Memory
RAM is an acronym for random access memory. RAM acts as a capacitor memory which holds data briefly as it moves through the processor.
It's commonly called the CPU, Central Processing Unit.
If are using Windows XP, find My Computer and right-click on it. Then click on Properties. This will bring up a window that shows all of your processor information.
The speed of processor is very high in comparison to that of user and input/output device.... So if processor is made to wait and work in the speed to user and I/O devices the system becomes very slow... Hence, in order to make full use of processor's speed MEMORY MANAGEMENT is done
The different resources of operating system are file system,input/output devices,memory unit,processor....
The Type of transfers that must a computer interconnection structure support thats a bus is the following: (1) Memory to Processor (2) Processor to Memory (3) I/O to Processor (4) Processor to I/O (5) I/O to or from Memory
CPU stands for Central Processing Unit. In short it's the processor which is the 'brain' of the computer. Memory is the working area of the computer. Input devices are devices which are used to send/enter data to the computer and output devices are used to show us the results of our work. The secondary storage device is to save our work on to it such as a floppy disk or a memory stick.
processor and main memory
If you have a mix of RAM devices with different speed capabilities on a motherboard, the memory bus will work on speed of the slowest memory. Then it does not matter which slot you put which memory. - Neeraj Sharma