Dual Core Processors and Core 2 Duo Processors are CPUs whose job is to process data as per request. A dual-core processor comes with two cores while a core 2 duo processor is a series of dual-core processors. In this article, we will see the difference between Dual-Core and Core 2 Duo Processors. What is a Dual Core Processor? The main aim of making a computer was to solve different types of mathematical problems. The data processing speed of the first computers was very slow. Another disadvantage was that they could run only one process at a time so other ... Read More

Distributed and parallel computing consists of multiple processors or autonomous computers where either memory is shared or a computer is used as a single system. In this article, we will discuss the difference between distributed and parallel computing. What is Parallel Computing? Parallel computing is a system in which multiple processors are used to perform different types of tasks. This is a system in which memory can be shared or distributed between the processors. Parallel computing is a system which can be used to save money and time. Parallel computing is also known as parallel processing in which each processor ... Read More

Both multiprocessors and multicomputers are the types of parallel computing systems. The basic difference between a multiprocessor and a multicomputer is that a multiprocessor is a single computer system containing multiple processors interconnected with the common I/O and memory devices, whereas a multicomputer is a system consists of several autonomous computers connected in a network and each computer has its own I/O and memory devices, and other computing resources. Read through this article to find out more about multiprocessors and multicomputers and how they are different from each other. What is Multiprocessor? A multiprocessor is a data processing system that ... Read More

A microprocessor can be defined as an electronic component of a computer system that executes the instructions to perform tasks involved in computer processing. It is the most fundamental unit of computer that executes all the functions of a CPU. Till date, several types of microprocessors have been developed. But in this article, we will learn about the two earliest microprocessors, namely, 8086 and 8088 microprocessors. Both 8086 and 8088 microprocessors are widely used in embedded systems due to their various important and unique features. This articles is primarily meant for explaining the major differences between 8086 and 8088 microprocessors. ... Read More

Here we will see the data memory structures of 8051 microcontroller. The internal data memory of 8051 is divided into two groups. These are a set of eight registers, and a scratch pad memory. These eight registers are R0 to R7. The address range 00H to 07H is used to access the registers, and the rest are scratch pad memory.8051 Provides four register bank, but only one register bank can be used at any point of time. To select the register bank, two bits of PSW (Program Status Word) are used.So the following addressing can be used to select register ... Read More

Here we will see the address registers of 8257 chip.Every DMA channel consists an address register and a count register. These registers are 16-bits wide in length. In each 16 bits there are four ARs marked as AR3-0. Apart from four CRs there are control and status registers also. They are separate 8-bit registers, but have the same address. Here the processor can only write in the control register but we can read in the status register.We can select any one of the above registers by the address of the four pins marked as A3-0 of 8257. The processor used here ... Read More

In this section we will see how external RAM memories can be addressed by the Intel 8051 microcontroller. There are different methods for addressing the RAMs. Now at first we will discuss about some different types of RAM memories in short.The RAM (Random Access Memory) is volatile memory. So when the power is cutting off to the RAM chip, it losses the data. RAMs are also known as RAWM (Read and Write Memory). There are basically three kinds of RAMs. These are SRAM (Static RAM), NV-RAM (Non-Volatile RAM) and DRAM (Dynamic RAM).Static RAMThe storage cell in Static RAM are made ... Read More

Here we will see the division operation. This operation will be used to divide two 8-bit numbers using this 8051 microcontroller. The register A and B will be used in this operation. No other registers can be used for division. The result of the division has two parts. The quotient part and the remainder part. Register A will hold Quotient, and register B will hold Remainder.We are taking two number 0EH and 03H at location 20H and 21H, After dividing the result will be stored at location 30H and 31H.AddressValue …20H0EH21H03H …30H00H31H00H …Program      MOV R0, #20H ; set source address 20H ... Read More

Here we will see how to multiply two 8-bit numbers using this 8051 microcontroller. The register A and B will be used for multiplication. No other registers can be used for multiplication. The result of the multiplication may exceed the 8-bit size. So the higher order byte is stored at register B, and lower order byte will be in the Accumulator A after multiplication.We are taking two number FFH and FFH at location 20H and 21H, After multiplying the result will be stored at location 30H and 31H.AddressValue …20HFFH21HFFH …30H00H31H00H …Program      MOV R0, #20H ; set source address 20H to R0 ... Read More

Now, in this section we will see how to subtract two 8-bit numbers using 8051 microcontroller. The register A (Accumulator) is used as one operand in the operations. There are seven registers R0 – R7 in different register banks. We can use any of them as second operand.We are taking two number 73H and BDH at location 20H and 21H, After subtracting the result will be stored at location 30H and 31H.AddressValue …20H73H21HBDH …30H00H31H00H …Program      MOV R0, #20H ; set source address 20H to R0       MOV R1, #30H ; set destination address 30H to R1       ... Read More