What is the meaning of addressing mode?

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Discussion Overview

The discussion revolves around the concept of addressing mode in computer architecture, specifically focusing on the interpretation of certain assembly language statements and hexadecimal values. Participants explore the meaning of defined byte and word values, as well as the implications of using hexadecimal notation in instructions.

Discussion Character

  • Technical explanation, Conceptual clarification

Main Points Raised

  • One participant asks for clarification on what addressing mode is and the meaning of specific assembly language statements.
  • Another participant explains that 45h is a hexadecimal value, not an address, and notes that hexadecimal is commonly used in computing for easier interpretation of binary values.
  • This participant also claims that the commands MOV AX, 45H and MOV AX, 69 are identical from the computer's perspective.
  • A later reply thanks the previous participant for their explanation.

Areas of Agreement / Disagreement

There appears to be a general agreement on the interpretation of 45h as a hexadecimal value and the equivalence of the two MOV commands, but the initial question about addressing mode remains unresolved.

Contextual Notes

The discussion does not address the broader implications of addressing modes or how they relate to the provided assembly language examples.

shantanu135
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what is addressing mode? and what is the meaning of these following statements
BYTE_VALUE DB 150; A byte value is defined
WORD_VALUE DW 300; A word value is defined
ADD BYTE_VALUE,65;An immediate operand 65is added
MOV AX,45H
what is 45h?
 
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It's not an address, it's just a hexidecimal value. We use base 16 in computers a lot because it makes thinking about numbers in terms of bits easier. 45h = 69

These commands are exactly identical as far as the computer is concerned.
MOV AX, 45H
MOV AX, 69
 
newjerseyrunner said:
It's not an address, it's just a hexidecimal value. We use base 16 in computers a lot because it makes thinking about numbers in terms of bits easier. 45h = 69

These commands are exactly identical as far as the computer is concerned.
MOV AX, 45H
MOV AX, 69
 
thanks man
 

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