Registers in microprocessor 8085 pdf

In small computers the number of registers is small due to the limited size of the chip. The 80858080aprogramming model includes six registers, one accumulator, and one flag register. Registers of 8085 microprocessor a microprocessor is a multipurpose, programmable, clockdriven, registerbased electronic device that reads binary instructions from a storage device called memory, accepts binary data as input and processes data according to those instructions and provide results as output. The 8085 uses a total of 246 bit patterns to form its instruction set. Each instruction is represented by an 8bit binary value. Register a is quite often called as an accumulator. The ivt entry must redirect the microprocessor to the actual service routine. So, as we have seen that any processor, it will have an arithmetic logic unit it will have some register file consisting of a set of registers, and some controller. The basic units or blocks of a microprocessor are alu, an array of registers. The time for the back cycle of the intel 8085 a2 is 200 ns. The 80858080a programming model includes six registers, one accumulator, and one flag register. Data remain in the registers till they are sent to the memory or io devices. The 8085 resets clears instruction register, interrupt mask bits and other registers. Join researchgate to discover and stay uptodate with the latest research from leading experts in microprocessor 8085 and many other scientific topics.

The 8085 includes six registers, one accumulator and one flag register, as shown in fig. To perform the multiplication of two 8 bit numbers using 8085. Intel 8085 8bit microprocessor shrimati indira gandhi. The flag register is a special purpose register and it is completely different from other registers in microprocessor.

Microprocessor consists of an alu, register array, and a control unit. Intel 8085 8bit microprocessor intel 8085 is an 8bit, nmos microprocessor. Instruction set of 8085 an instruction is a binary pattern designed inside a microprocessor to perform a specific function. The entire group of instructions that a microprocessor supports is called instruction set. Tutorial on introduction to 8085 architecture and programming. The 8085 8080aprogramming model includes six registers, one accumulator, and one flag register, as shown in figure. Intel 8085 microprocessor has the following registers. When the microprocessor executes the rst instruction received from the device, it saves the address of the next instruction on the stack and jumps to the appropriate entry in the ivt. Lecture note on microprocessor and microcontroller theory vssut. In a large computer the number of registers is more and hence the program requires less transfer of data to and from the memory. It is a 40 pin c package fabricated on a single lsi chip. These registers are not available for the programmer since 8085microprocessor architecture uses them internally. Mjcroprocessor me idiscovered your microprocessor opcode sheet by chance stumbleupon.