One-page reference for Win32 assembly language programming.

Created by Peter Kankowski
Last changed
Filed under Assembly language and machine code

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Win32 Assembly Cheat Sheet

The cheat sheet is intended for 32-bit Windows programming with FASM. One A4 page contains almost all general-purpose x86 instructions (except FPU, MMX and SSE instructions).

What is included

You will find various kinds of moves (MOV, CMOV, XCHG), arithmetical (ADD, SUB, MUL, DIV) and logical (AND, OR, XOR, NOT) instructions here. Several charts illustrate shifts (SHL/SHR, ROL/ROR, RCL/RCR) and stack frames. Code samples for typical high-level language constructs (if conditions, while and for loops, switches, function calls) are shown. Also included are quick references for RDTSC and CPUID instructions, description of string operations such as REP MOVSB, some code patterns for branchless conditions, a list of registers that should be saved in functions, and a lot of other useful stuff.

The idea is to put all reference information about x86 assembly language on the one page. Some rarely-used instructions such as LDS, BOUNDS or AAA are skipped.


The cheat sheet use common notation for operands: reg means register, [mem] means memory location, and imm is an immediate operand. Also, x, y, and z denote the first, the second, and the third operand. Instruction mnemonics are written in capital letters to make them easier to find when you are skipping through the cheat sheet.


A chunk of cheat sheet showing multiplication and division reference

For example, let's look at multiplication and division section. There are instructions for signed (IMUL) and unsigned (MUL) multiplication. Both instructions take one operand, which may be register (reg) or memory ([mem]). There are three possible cases:

  • If operand size is one byte, MUL or IMUL multiplies it by al and stores the result in ax
  • If operand size is a word, MUL or IMUL multiplies it by ax and stores the high-order word of the result in dx and the low-order word in ax.
  • If operand size is a double word, MUL or IMUL multiplies it by eax and stores the high-order dword in edx and the low-order dword in eax.

There are also two-operand and three-operand forms of IMUL shown on the figure above.

Other features of assembly language are described in a similar way.


The cheat sheet is designed for A4 page size; if you print it on US Letter paper, you will get large margins. You can print the cheat sheet and put it on your table to look for some instructions when you forget them.

Download Win32 Assembly Cheat Sheet (PNG picture, 713 Kb)

Serbo-Croatian translation of this article by WHG Team.

Peter Kankowski
Peter Kankowski

About the author

Peter is the developer of Aba Search and Replace, a tool for replacing text in multiple files. He likes to program in C with a bit of C++, also in x86 assembly language, Python, and PHP.

Created by Peter Kankowski
Last changed


Ten recent comments are shown below. Show all comments

excellent cheat sheet. thank you very much!
Hello. All is A4 format:

x86 registers:

x86 instructions:

Peter Kankowski,
Thank you! I cannot read Slovak, but your charts seem to be good for learning assembly language.

Hi, I'd like to learn "assembly"at home.

I can program in java but I don't know anything about "assembly". I say ANYTHING.

Where do I start?

Peter Kankowski,
Please start by googling for "assembly tutorial" (try also in your native language). Paul Carter's tutorial looks good at the first glance. You can also download FASM and read its docs.

Thank You Mr Peter.

It helped me a lot.

Mater Liu,

great Peter, thank you.




Thank you, by this very helpful site :)

Kind regards,


(from Portugal)
<p>thank you</p>

student: example count cube in assembler tasm x86


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