Types of Memory
a) Primary Memory
Memory,also called primary storage,is where data and instructions are stored during processing by the microprocessor.the memory or the storage section o the computer consists of the devices used to store the information that would be used to hold both intermediate and final results as the computer proceeds through the program. memory devices are constructed so that it is possible for the control unit to obtain any information from the memory. the time required to obtain information may vary somewhat,and is determined by the type of device used to store the information. common storage devices are integrated circuit memories, magnetic tapes and magnetic disks.
further, the memory unit is an essential component in any digital computer since it is needed for storing the programs that are executed by the CPU. the memory unit that communicates directly with the CPU is called the main memory and devices that provide backup storage are called the auxiliary memory. only programs and data currently used by the processor reside in main memory . there are two types of memories,read only memory (ROM) and random access memory(RAM)
1) Read only memory (ROM)
A read only memory (ROM), as the name implies, is a memory unit that performs the read operation only;it does not have a write capability .this implies that the binary information stored in a ROM is made permanent during the hardware production of the unit and cannot be altered by writting different words in
Memory,also called primary storage,is where data and instructions are stored during processing by the microprocessor.the memory or the storage section o the computer consists of the devices used to store the information that would be used to hold both intermediate and final results as the computer proceeds through the program. memory devices are constructed so that it is possible for the control unit to obtain any information from the memory. the time required to obtain information may vary somewhat,and is determined by the type of device used to store the information. common storage devices are integrated circuit memories, magnetic tapes and magnetic disks.
further, the memory unit is an essential component in any digital computer since it is needed for storing the programs that are executed by the CPU. the memory unit that communicates directly with the CPU is called the main memory and devices that provide backup storage are called the auxiliary memory. only programs and data currently used by the processor reside in main memory . there are two types of memories,read only memory (ROM) and random access memory(RAM)
1) Read only memory (ROM)
A read only memory (ROM), as the name implies, is a memory unit that performs the read operation only;it does not have a write capability .this implies that the binary information stored in a ROM is made permanent during the hardware production of the unit and cannot be altered by writting different words in
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