1. ADD R R ⇒ A, B, C, D, E, H, L, and M Instruction word size ⇒ 1 Byte Operation ⇒ When this instruction will execute the content of Register R will get added to the accumulator (A) and the final result will store in the accumulator [A]. [A] ← [A] + [R] Addressing Mode ⇒ If R ≠ M … Read more
1. NOP no operand Instruction word size ⇒ 1 Byte Operation ⇒ When this instruction will execute microprocessor will not perform any task. It is used for the creation of delay. Addressing Mode ⇒ Implicit Addressing Mode 2. HLT no operand Instruction word size ⇒ 1 Byte Operation ⇒ When this instruction will execute further increment of the program counter … Read more
Rd = Destination register Rs = Source register 1. MOV Rd , Rs Rd & Rs ⇒ A, B, C, D, E, H, L, and M Instruction word size ⇒ 1 Byte Operation ⇒ When this instruction will execute the content of source register (Rs) will pass in the destination register (Rd). [Rd ] ← [Rs ] Addressing Mode ⇒ Register Addressing Mode For … Read more
An interrupt is a signal to the processor, generated by hardware or software indicating an immediate attention needed by an event. In this article, we will learn about hardware interrupts. In 8085 microprocessor, there is 5 hardware interrupts. S.No. Name of Interrupt Priority Vector address Masking type Types of trigger 1 TRAP Highest (1) 0024 … Read more
An interrupt is a signal that alerts the processor to an urgent condition, either originating from hardware or triggered by software, necessitating immediate attention. This mechanism allows the processor to temporarily halt its current operations and address the event requiring attention. In this article, we will focus on software interrupts. The 8085 microprocessor has eight … Read more
Flags Flags are flip-flops that store bit 0 or 1 based on the arithmetic or logical operation performed by an arithmetic and logical unit (ALU). In most of the operations, the result is stored in the accumulator. There are five flags present in 8085 microprocessor. All the flags are present in an 8-bit register called as status … Read more
A flowchart is a program designing tool which is designed to show the processing logic of any program. It is a pictorial representation so it can be drawn on the paper only. It is free from any particular programming language. The processing logic shown by flowchart can be implemented in any programming language. The symbols … Read more
Microprocessor Definition A microprocessor is a multi-purpose, Programmable, clock driven, register-based 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. OR It is an electronic device that fetches instructions from memory, execute them and provide … Read more
In this article, we will discuss the Difference between 8085 and 8086 Microprocessor. 8085 Microprocessor 8086 Microprocessor Size 8085 is an 8-bit microprocessor. 16-bit microprocessor Address Bus 8085 has 16-bit address bus 8086 has 20-bit address bus Memory 8085 can access upto 216 = 64 Kb of memory. 8086 can access upto 220 = 1 MB of … Read more
Q. Write an 8085 program and draw a flowchart to Transfer block of N-bytes in reverse order from source to destination.(8085 Microprocessor Program) Flowchart/Algorithm Program Address Mnemonics Operand Opcode Comments 2000 MVI C, 05H 0E Initialize reg. C to 05H, i.e. number of bytes. 2001 05 2002 LXI H, 3000H 21 Initialize H-L pair … Read more