Addressing Modes in 8085

There are five addressing modes in 8085.

1. Immediate Addressing Mode: - An immediate is transferred directly to the register.

Eg: - MVI A, 30H (30H is copied into the register A)

          MVI B,40H(40H is copied into the register B).





2. Register Addressing Mode: - Data is copied from one register to another register.

Eg: - MOV B, A (the content of A is copied into the register B)

          MOV A, C (the content of C is copied into the register A).





3. Direct Addressing Mode: - Data is directly copied from the given address to the register.

Eg: - LDA 3000H (The content at the location 3000H is copied to the register A).





4. Indirect Addressing Mode: - The data is transferred from the address pointed by the data in a register to other register.

Eg: - MOV A, M (data is transferred from the memory location pointed by the regiser to the accumulator).





5.Implied Addressing Mode: - This mode doesn't require any operand. The data is specified by opcode itself.

Eg: - RAL
          CMP

36 comments:

  1. Unknown5 December 2012 at 01:24

    thanks ^_^

    ReplyDelete
    Replies
    1. Queen Delz24 November 2013 at 07:33

      Hey sujal u look cute n resemble my lecturer his name is sudakhar

      Delete
  2. Unknown11 February 2013 at 03:25

    implicit not implied

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    Replies
    1. Androsoul17 April 2013 at 07:52

      Try venture out of limited books.
      Implicit, is also knows as Implied Addressing Mode.
      Both are used synonymously.

      Delete
    2. Ankit Sharma Tutorials28 August 2014 at 19:55

      implied or implicit, we can call it by either name.

      Delete
  3. Unknown22 April 2013 at 04:31

    Can u tell me what is the best book available in markate for 8085.

    ReplyDelete
    Replies
    1. Unknown26 April 2013 at 15:04

      Ramesh Gaonkar is best book for 8085 microprocessor. There are some reference that u can refer like microprocessor by U S Shah.

      Delete
    2. Unknown13 May 2013 at 23:03

      mazidi-mazidi is the bes one for it..

      Delete
    3. Unknown9 June 2013 at 01:19

      dear all pls help
      for the programme given, determine the range of the bytes(output) that will be displayed at PORT2
      MVI A, BYTE 1
      MOV B,A
      SUI 50H
      JC DELETE
      MOV A,B
      SUI 80H
      JC DISPLAY
      DELETE: XRA A
      OUT PORT1
      HLT
      DSPLAY: MOV A,B
      OUT PORT2
      HLT

      Delete
    4. Unknown6 January 2014 at 08:23

      B.RAM is best for 8085.

      Delete
    5. Unknown18 December 2014 at 17:01

      http://books.google.com.np/books?id=Gky_Gjk4De0C&printsec=frontcover&dq=microprocessor&hl=en&sa=X&ei=4BlwVNGPOdS58gXWmIHQBQ&redir_esc=y#v=onepage&q=microprocessor&f=false

      Delete
  4. An-WAR27 June 2013 at 01:40

    thanKs BRo

    ReplyDelete
  5. Unknown20 September 2014 at 02:37

    easy to understand

    ReplyDelete
  6. Sumit1 December 2014 at 01:33

    u.s Shah (rtu) is the best book for intel 8085

    ReplyDelete
  7. Arindam16 November 2015 at 05:04

    to the point::good...

    ReplyDelete
  8. Unknown6 December 2015 at 22:25

    Is that any difference between MVI & MOV instrusction???
    And what's the meanning of i in MVI instruction, is that all immediate addressing mode instructions have latter 'i' at the end of the instruction? Like LXI,MVI ..... Etc

    ReplyDelete
    Replies
    1. vikas kumar23 October 2016 at 07:56

      operand in MVI is an 8 bit data and the register in which we are moving data but in case of MOV we are data from one register to other operands are 2 registers

      Delete
  9. abhishek4 January 2016 at 13:40

    thank you for collecting these information

    ReplyDelete
  10. Unknown14 January 2016 at 06:53

    Mv stans fr move i sands fr immediately.....dats all

    ReplyDelete
  11. Anurag18 February 2016 at 10:53

    5th addressing mode is not implied its implicit adderssing mode

    ReplyDelete
    Replies
    1. Unknown6 May 2016 at 08:12

      no..implicit and implied are both valid addressing mode . they are synonymous . I teach Implied to my student

      Delete
    2. Unknown6 May 2016 at 08:12

      no..implicit and implied are both valid addressing mode . they are synonymous . I teach Implied to my student

      Delete
  12. Unknown24 May 2016 at 04:08

    If you are a begginer. Then,
    V.J. Vibhute & P.B. Borole is the best book for Microprocessor 8085.

    ReplyDelete
  13. Calvin Mwareri13 July 2016 at 00:48

    thankyou all

    ReplyDelete
  14. Afzal Ahmad30 August 2016 at 12:21

    are bas semester pass karna hai(i just have to pass my semester exams,i dont want to do phd in mp.)

    ReplyDelete
  15. Unknown3 September 2016 at 05:29

    Microprocessor Architecture, Programming, and Application with the 8085 by Ramesh Gaonkar is the best book.....

    ReplyDelete
  16. Unknown6 September 2016 at 19:49

    What is the importance of addressing modes in 8085 and 8086?

    ReplyDelete
  17. Mannan19 September 2016 at 18:58

    Thanks pa

    ReplyDelete
  18. Mannan19 September 2016 at 18:59

    Thanks pa

    ReplyDelete
  19. vpraveenkumar20 September 2016 at 00:23

    LX1H F0F0 isn't immediate instruction or not?

    ReplyDelete
  20. Gojiraaa23 November 2016 at 20:24

    In register addressing, it will result an error if the source and the adress are not on the same size. So how can you know the source and the address are the same size?

    ReplyDelete
  21. Raymond Wachaga4 December 2016 at 18:14

    Thanks bro! Assignment complete. Beer time :)

    ReplyDelete
  22. Unknown20 May 2017 at 09:43

    thanks

    ReplyDelete
  23. Darshan2 November 2017 at 17:17

    Thanks Buddy

    ReplyDelete
  24. Unknown15 November 2017 at 07:26

    Thank you if some more data is present it will be very fine

    ReplyDelete
  25. Unknown6 March 2018 at 23:02

    Introduction to Non-monotonic Reasoning
    Features of Real Time Operating System
    Implementation of Readers Writer Problem using Semaphore
    Quality Standards ISO 9000 and 9001 and CMM
    Quality Function Deployment
    Public Key Infrastructure
    Various Propagation Modes
    Production System in Details
    Process Model in Operating System

    ReplyDelete