Copy Buffer1 to Buffer2 in Intel 586 ASM: Beginner's Guide

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SUMMARY

This discussion focuses on copying string contents from one buffer to another in assembly language on Intel 586 architecture without utilizing string functions. The conversation highlights the differences between real mode and protected mode assembly, noting that real mode is limited to 1MB while protected mode can access up to 4GB of memory. Beginners are encouraged to understand these modes to effectively navigate assembly programming on different operating systems, such as DOS in Windows XP versus Windows 95.

PREREQUISITES
  • Basic understanding of assembly language programming
  • Familiarity with Intel 586 architecture
  • Knowledge of real mode and protected mode concepts
  • Experience with memory management in assembly
NEXT STEPS
  • Research how to implement memory copying in Intel 586 assembly without string functions
  • Study the differences between real mode and protected mode in assembly programming
  • Learn about memory addressing in protected mode assembly
  • Explore practical examples of buffer manipulation in assembly language
USEFUL FOR

Beginner assembly language programmers, computer architecture students, and anyone interested in low-level programming on Intel 586 systems.

liahow
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In assembly language (on at least an Intel 586 arch) how would I copy the string contents of one buffer to another without using any string functions for copying? I want to copy the contents from buffer1 to buffer2. I'm just beginning to learn how to code in assembly language, so I'm completely lost!
 
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Are you doing real or protected mode assembly?
 
I was wondering, is it the real mode and protected mode difference that makes the current DOS in windows XP seem different to the DOS in windows 95? I know that real mode is limited to 1mb and protected is something like 4gb.
 

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