[PDF] 8086 microprocessor architecture notes

The 8086 microprocessor has two main execution units: the execution unit (EU) and the bus interface unit (BIU). The BIU is responsible for fetching instructions from memory and decoding them, while the EU executes the instructions. The BIU also manages data transfer between the microprocessor and memory or I/O devices.
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  • What are the 14 registers of 8086 architecture?

    The 8086 has 14 16 bits registers. AX, BX, CX, DX, SI, DI, BP, SP, CS, DS, SS, ES, IP and the flags register. The last two are only accessed indirectly.

  • What is 8086 programming model?

    The programming model of the 8086 through the Core2 microprocessor contains 8-, 16-, and 32- bit registers. The 8-bit registers are AH, AL, BH, BL, CH, CL, DH, and DL and are referred to when an instruction is formed using these two-letter designations. For example, ADD AL, AH. adds the 8-bit contents of AH to AL. (

  • What are the 8 different types of instruction in 8086?

    Microprocessor - 8086 Instruction Sets

    Data Transfer Instructions.Arithmetic Instructions.Bit Manipulation Instructions.String Instructions.Program Execution Transfer Instructions (Branch & Loop Instructions)Processor Control Instructions.Iteration Control Instructions.Interrupt Instructions.
  • 8086 microprocessor made up of 29,000 MOS transistors and could work at a clock speed of 5-10 MHz. It has a 16-bit ALU with 16-bit data bus and 20-bit address bus. It can address up to 1MB of address space. The pipelining concept was used for the first time to improve the speed of the processor.
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