Basics of 8086
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This document summarizes the architecture and instruction set of the 8086 microprocessor. It describes the execution unit containing the control unit, ALU, registers, and flags. It also details the bus interface unit and its instruction stream and segment registers. The document outlines the 8086's addressing modes including implied, register, immediate, and based indexed modes. It provides overviews of the 8086's data transfer, arithmetic, logical, string, program transfer, and processor control instructions.
Basics of 8086
- 1. STUDY OF 8086 8086 Architecture PIN Diagram Addressing Modes Instruction Set Prepared By pdfshare
- 2. 8086 Architecture Diagram Prepared By pdfshare
- 3. Execution Unit The Execution Unit (EU) has Control unit Instruction decoder Arithmetic and Logical Unit (ALU) General registers Flag register Pointers Index registers Prepared By pdfshare
- 4. Execution Unit - Registers Prepared By pdfshare
- 5. Execution Unit - Flags Prepared By pdfshare
- 6. Execution Unit - Pointers Prepared By pdfshare
- 7. Bus Interface Unit The BIU has Instruction stream byte queue A set of segment registers Instruction pointer Prepared By pdfshare
- 8. Pin Diagram Prepared By pdfshare
- 9. Addressing Modes Implied Addressing – The data value/data address is implicitly associated with the instruction Register Addressing – The data is specified by referring the register or the register pair in which the data is present Immediate Addressing – The data itself is provided in the instruction Direct Addressing – The instruction operand specifies the memory address where data is located Prepared By pdfshare
- 10. Addressing Modes Register indirect addressing – The instruction specifies a register containing an address, where data is located Based - 8-bit or 16-bit instruction operand is added to the contents of a base register (BX or BP), the resulting value is a pointer to location where data resides Indexed - 8-bit or 16-bit instruction operand is added to the contents of an index register (SI or DI), the resulting value is a pointer to location where data resides Prepared By pdfshare
- 11. Addressing Modes Based Indexed - the contents of a base register (BX or BP) is added to the contents of an index register (SI or DI), the resulting value is a pointer to location where data resides Based Indexed with displacement - 8-bit or 16-bit instruction operand is added to the contents of a base register (BX or BP) and index register (SI or DI), the resulting value is a pointer to location where data resides Prepared By pdfshare
- 12. Data Transfer Instructions Prepared By pdfshare
- 13. Data Transfer Instructions Prepared By pdfshare
- 14. Arithmetic Instructions Prepared By pdfshare
- 15. Arithmetic Instructions Prepared By pdfshare
- 16. Logical Instructions Prepared By pdfshare
- 17. String Instructions Prepared By pdfshare
- 18. Program Transfer Instructions Prepared By pdfshare
- 19. Program Transfer Instructions Prepared By pdfshare
- 20. Processor Control Instructions Prepared By pdfshare
- 21. Prepared By PDFSHARE Prepared By PDFSHARE