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BRANCH-E & TC ENGG

SUBJECT-MICROPROCESSOR & MICROCONTROLLER

CHAPTER-2- INSTRUCTION SET AND ASSEMBLY LANGUAGE PROGRAMMING

TOPIC-ARCHITECTURE OF 8086 MICROCONTROLLER

SEM-4TH

FACULTY-ER. ARADHANA DAS(LECT. E & TC ENGG DEPARTMENT)

AY-2021-2022, SUMMER-2022

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8085 INSTRUCTION

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PROGRAMMING LANGUAGES

  • High level languages
  • Assembly languages
  • Machine languages

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COMPILATION PROCESS

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ASSEMBLY PROCESS

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JAVA APPLETS

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ASSEMBLY LANGUAGE ATTRIBUTES

  • Instruction types
  • Data types
  • Addressing modes
  • Instruction formats

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INSTRUCTION TYPES

  • Data transfer
  • Data operation
  • Program control

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DATA TYPES

  • Numeric (integer, floating point)
  • Boolean (true, false)
  • Character (ASCII, Unicode)

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ADDRESSING MODES - DIRECT

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ADDRESSING MODES - INDIRECT

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ADDRESSING MODES - REGISTER DIRECT

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ADDRESSING MODES - REGISTER INDIRECT

@ R

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ADDRESSING MODES - IMMEDIATE

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ADDRESSING MODES - IMPLICIT

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ADDRESSING MODES - RELATIVE

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ADDRESSING MODES - INDEXED

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INSTRUCTION FORMATS

  • More operands = less instructions
  • More operands = larger words

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3-OPERAND INSTRUCTIONS

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2-OPERAND INSTRUCTIONS

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1-OPERAND INSTRUCTIONS

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0-OPERAND INSTRUCTIONS

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INSTRUCTION SET ARCHITECTURE

  • Instruction set
  • Register set
  • Memory access information

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ISA ATTRIBUTES

  • Completeness
  • Orthogonality
  • Register set design

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ISA REQUIREMENTS

  • Backward compatibility?
  • Data types/sizes
  • Interrupts?
  • Conditional instructions?

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A RELATIVELY SIMPLE ISA - REGISTERS

  • Accumulator AC
  • General purpose register R
  • Flag Z

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A RELATIVELY SIMPLE ISA - INSTRUCTION SET

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A Relatively Simple ISA - Instruction Set (continued)

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A RELATIVELY SIMPLE ISA - INSTRUCTION FORMATS

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THE 8085 ISA - REGISTERS

  • Accumulator A
  • General purpose registers B, C, D, E, H, L
  • Stack pointer SP
  • Flags S, Z, P, CY, AC

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THE 8085 ISA - INSTRUCTION SET

  • Data movement instructions

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THE 8085 ISA - INSTRUCTION SET

  • Data operation instructions

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THE 8085 ISA - INSTRUCTION SET

  • Program control instructions

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THE 8085 ISA - INSTRUCTION FORMATS

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EXAMPLE 8085 PROGRAM CODE

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EXAMPLE 8085 PROGRAM TRACE

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THE 8085 ISA - ANALYSIS

  • Completeness
  • Orthogonality
  • Register set design

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SUMMARY

  • Programming Languages
  • ISA Design

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THANK YOU

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