- Assembly Arithmetic Algorithms
- Preface
- Introduction
- Required Knowledge
- Low Level
- Why DOS?
- Online Example Programs
- Chapter 1: The First Program
- Assemble with FASM
- Assemble with NASM
- Disassembling the Program
- The General Purpose Registers
- Interrupt Information
- Chapter 2: The putstring Function
- Chapter 3: The intstr and putint functions
- Chapter 4: Chastity’s Intel Assembly Reference
- mov
- add
- sub
- mul
- div
- cmp
- jmp
- To be written:
- Chapter Z: More Documentation
Assembly Arithmetic Algorithms-DOS
16-bit DOS Edition
Low level is a term that confuses people. People think something high level is better than low level. In simple terms, humans consider themselves superior to machines and therefore think themselves higher or more important because of their abstract though.
A computer thinks only in terms of numbers. A computer may not understand "high level" abstractions such as love, religion, philosophy, etc, but that is not its job. A computer must add, subtract, multiply, and divide. These are the four arithmetic functions which many human struggle to do.
I wrote this book because I think like a machine and I hope to help others think this way because it is the best way to learn programming and control your computer by writing Assembly Language programs or to go back to your favorite programming language with a greater understanding of why things work as they do.
The author is letting you choose the price you pay for this book!
Low level is a term that confuses people. People think something high level is better than low level. In simple terms, humans consider themselves superior to machines and therefore think themselves higher or more important because of their abstract though.
A computer thinks only in terms of numbers. A computer may not understand "high level" abstractions such as love, religion, philosophy, etc, but that is not its job. A computer must add, subtract, multiply, and divide. These are the four arithmetic functions which many human struggle to do.
I wrote this book because I think like a machine and I hope to help others think this way because it is the best way to learn programming and control your computer by writing Assembly Language programs or to go back to your favorite programming language with a greater understanding of why things work as they do.
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About
About the Book
You might be surprised to find a book in the 21st century about programming in Assembly Language on DOS.
First, let me introduce this book by telling you what I will teach you. By the end of this book, you will have enough information to write any text based console program in the form of a 16-bit DOS (Disk Operating System) ".com" file.
The ".com" file was a format used by all version of MS-DOS, and even supported on Windows up to XP. It has no header information and is limited to 64 kilobytes of memory. Rather than viewing the limitation as a weakness, I view it as a strength because it forces me to be a better programmer and squeeze the most out of every byte.
To get the most out of this book, some background on the Binary and Hexadecimal numeral systems is going to be helpful, but this is not strictly required because I will be providing functions you can use in your code that will convert between decimal (base ten), binary (base two), and hexadecimal (base 16).
However, I would say that experience in at least one programming language is necessary for an understanding of terminology like "arrays", "pointers", "addresses", "integers", "floating point", etc. I recommend the C Programming Language as a start. C++ is also a good starting language but tends to abstract details away that directly apply to Assembly Language, which is the lowest level a human can go for understanding a computer.
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About the Author
Chastity White Rose
Chastity White Rose is an author of over twelve books and two WordPress blogs. She writes humorous and educational content about philosophical and religious topics. She also uses her writing and graphic design skills to teach people about the game of Chess. She is earning an associate’s degree in creative writing at Full Sail University. As a transgender Christian woman, she writes books and blog posts to help others like her process the seeming disconnect between religious faith and an LGBTQIA+ identity. She measures the success of her writing by its emotional impact rather than its sales. For this reason, most of her writing is available free of charge.
Contents
Table of Contents
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