Microinstruction Format Notes | Study Computer Architecture & Organisation (CAO) - Computer Science Engineering (CSE)

Document Description: Microinstruction Format for Computer Science Engineering (CSE) 2022 is part of Computer Architecture & Organisation (CAO) preparation. The notes and questions for Microinstruction Format have been prepared according to the Computer Science Engineering (CSE) exam syllabus. Information about Microinstruction Format covers topics like and Microinstruction Format Example, for Computer Science Engineering (CSE) 2022 Exam. Find important definitions, questions, notes, meanings, examples, exercises and tests below for Microinstruction Format.

Introduction of Microinstruction Format in English is available as part of our Computer Architecture & Organisation (CAO) for Computer Science Engineering (CSE) & Microinstruction Format in Hindi for Computer Architecture & Organisation (CAO) course. Download more important topics related with notes, lectures and mock test series for Computer Science Engineering (CSE) Exam by signing up for free. Computer Science Engineering (CSE): Microinstruction Format Notes | Study Computer Architecture & Organisation (CAO) - Computer Science Engineering (CSE)
1 Crore+ students have signed up on EduRev. Have you?

Microinstruction Format
Computer Instruction Format 

  • The computer instruction format is depicted in Fig. 3-5(a).
  • It consists of three fields:
    • A 1-bit field for indirect addressing symbolized by I
    • A 4-bit operation code (opcode)
    • An 11-bit address field
  • Fig. 3-5(b) lists four of the 16 possible memory-reference instructions.

Microinstruction Format Notes | Study Computer Architecture & Organisation (CAO) - Computer Science Engineering (CSE)

Microinstruction Format Notes | Study Computer Architecture & Organisation (CAO) - Computer Science Engineering (CSE)

Microinstruction Format

  • The microinstruction format for the control memory is shown in Fig. 3-6.
  • The 20 bits of the microinstruction are divided into four functional parts.
    •  The three fields  F1, F2, and F3 specify microoperations for the computer.
    • The CD field selects status bit conditions.
    • The BR field specifies the type of branch.
    • The AD field contains a branch address.

Microinstruction Format Notes | Study Computer Architecture & Organisation (CAO) - Computer Science Engineering (CSE)

Microoperations

  • The three bits in each field are encoded to specify seven distinct microoperations as listed in Table 3-1.
    • No more than three microoperations can be chosen for a microinstruction, one from each field.
    • If fewer than three microoperations are used, one or more of the fields will use the binary code 000 for no operation.
  • It is important to realize that two or more conflicting microoperations cannot be specified simultaneously. e.g. 010 001 000
  • Each microoperation in Table 3-1 is defined with a register transfer statement and is assigned a symbol for use in a symbolic microprogram.

Microinstruction Format Notes | Study Computer Architecture & Organisation (CAO) - Computer Science Engineering (CSE)

Microinstruction Format Notes | Study Computer Architecture & Organisation (CAO) - Computer Science Engineering (CSE)

Microinstruction Format Notes | Study Computer Architecture & Organisation (CAO) - Computer Science Engineering (CSE)

Microinstruction Format Notes | Study Computer Architecture & Organisation (CAO) - Computer Science Engineering (CSE)

Microinstruction Format Notes | Study Computer Architecture & Organisation (CAO) - Computer Science Engineering (CSE)

Condition and Branch Field

  • The CD field consists of two bits which are encoded to specify four status bit conditions as listed in Table 3-1.
  • The BR field consists of two bits. It is used, in conjunction with the address field AD, to choose the address of the next microinstruction.
    • The jump and call operations depend on the value of the CD field.
    • The two operations are identical except that a call microinstruction stores the return address in the subroutine register SBR.
    • Note that the last two conditions in the BR field are independent of the values in the CD and AD fields.
The document Microinstruction Format Notes | Study Computer Architecture & Organisation (CAO) - Computer Science Engineering (CSE) is a part of the Computer Science Engineering (CSE) Course Computer Architecture & Organisation (CAO).
All you need of Computer Science Engineering (CSE) at this link: Computer Science Engineering (CSE)

Related Searches

Microinstruction Format Notes | Study Computer Architecture & Organisation (CAO) - Computer Science Engineering (CSE)

,

pdf

,

shortcuts and tricks

,

Exam

,

video lectures

,

practice quizzes

,

MCQs

,

Microinstruction Format Notes | Study Computer Architecture & Organisation (CAO) - Computer Science Engineering (CSE)

,

Sample Paper

,

Important questions

,

mock tests for examination

,

past year papers

,

ppt

,

study material

,

Previous Year Questions with Solutions

,

Semester Notes

,

Free

,

Objective type Questions

,

Microinstruction Format Notes | Study Computer Architecture & Organisation (CAO) - Computer Science Engineering (CSE)

,

Summary

,

Viva Questions

,

Extra Questions

;