\documentclass[10pt,a4paper]{article}

% Packages
\usepackage{fancyhdr}           % For header and footer
\usepackage{multicol}           % Allows multicols in tables
\usepackage{tabularx}           % Intelligent column widths
\usepackage{tabulary}           % Used in header and footer
\usepackage{hhline}             % Border under tables
\usepackage{graphicx}           % For images
\usepackage{xcolor}             % For hex colours
%\usepackage[utf8x]{inputenc}    % For unicode character support
\usepackage[T1]{fontenc}        % Without this we get weird character replacements
\usepackage{colortbl}           % For coloured tables
\usepackage{setspace}           % For line height
\usepackage{lastpage}           % Needed for total page number
\usepackage{seqsplit}           % Splits long words.
%\usepackage{opensans}          % Can't make this work so far. Shame. Would be lovely.
\usepackage[normalem]{ulem}     % For underlining links
% Most of the following are not required for the majority
% of cheat sheets but are needed for some symbol support.
\usepackage{amsmath}            % Symbols
\usepackage{MnSymbol}           % Symbols
\usepackage{wasysym}            % Symbols
%\usepackage[english,german,french,spanish,italian]{babel}              % Languages

% Document Info
\author{joshfedo94}
\pdfinfo{
  /Title (assembler-final.pdf)
  /Creator (Cheatography)
  /Author (joshfedo94)
  /Subject (Assembler Final Cheat Sheet)
}

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% This two commands together give roughly
% the right line height in the tables
\renewcommand{\arraystretch}{1.3}
\onehalfspacing

% Commands
\newcommand{\SetRowColor}[1]{\noalign{\gdef\RowColorName{#1}}\rowcolor{\RowColorName}} % Shortcut for row colour
\newcommand{\mymulticolumn}[3]{\multicolumn{#1}{>{\columncolor{\RowColorName}}#2}{#3}} % For coloured multi-cols
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\newcommand{\tn}{\tabularnewline} % Required as custom column type in use

% Font and Colours
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\definecolor{FootBackground}{HTML}{666666}
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\definecolor{DarkBackground}{HTML}{333333}
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\renewcommand{\familydefault}{\sfdefault}
\color{TextColor}

% Header and Footer
\pagestyle{fancy}
\fancyhead{} % Set header to blank
\fancyfoot{} % Set footer to blank
\fancyhead[L]{
\noindent
\begin{multicols}{3}
\begin{tabulary}{5.8cm}{C}
    \SetRowColor{DarkBackground}
    \vspace{-7pt}
    {\parbox{\dimexpr\textwidth-2\fboxsep\relax}{\noindent
        \hspace*{-6pt}\includegraphics[width=5.8cm]{/web/www.cheatography.com/public/images/cheatography_logo.pdf}}
    }
\end{tabulary}
\columnbreak
\begin{tabulary}{11cm}{L}
    \vspace{-2pt}\large{\bf{\textcolor{DarkBackground}{\textrm{Assembler Final Cheat Sheet}}}} \\
    \normalsize{by \textcolor{DarkBackground}{joshfedo94} via \textcolor{DarkBackground}{\uline{cheatography.com/37022/cs/11664/}}}
\end{tabulary}
\end{multicols}}

\fancyfoot[L]{ \footnotesize
\noindent
\begin{multicols}{3}
\begin{tabulary}{5.8cm}{LL}
  \SetRowColor{FootBackground}
  \mymulticolumn{2}{p{5.377cm}}{\bf\textcolor{white}{Cheatographer}}  \\
  \vspace{-2pt}joshfedo94 \\
  \uline{cheatography.com/joshfedo94} \\
  \end{tabulary}
\vfill
\columnbreak
\begin{tabulary}{5.8cm}{L}
  \SetRowColor{FootBackground}
  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Cheat Sheet}}  \\
   \vspace{-2pt}Not Yet Published.\\
   Updated 2nd May, 2017.\\
   Page {\thepage} of \pageref{LastPage}.
\end{tabulary}
\vfill
\columnbreak
\begin{tabulary}{5.8cm}{L}
  \SetRowColor{FootBackground}
  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Sponsor}}  \\
  \SetRowColor{white}
  \vspace{-5pt}
  %\includegraphics[width=48px,height=48px]{dave.jpeg}
  Measure your website readability!\\
  www.readability-score.com
\end{tabulary}
\end{multicols}}




\begin{document}
\raggedright
\raggedcolumns

% Set font size to small. Switch to any value
% from this page to resize cheat sheet text:
% www.emerson.emory.edu/services/latex/latex_169.html
\footnotesize % Small font.

\begin{multicols*}{4}

\begin{tabularx}{3.833cm}{p{0.3433 cm} x{3.0897 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{3.833cm}}{\bf\textcolor{white}{maths}}  \tn
% Row 0
\SetRowColor{LightBackground}
IMUL & Multiply ax by what ever is specified (for 32 bit store in DX:AX) \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
DIV & (16 bit) takes the operand and divides it by AX and stores it in AL with remainder in AH. for 32 bit it used DX:AX pair and leaves awn is AX and remainder in DX \tn 
% Row Count 7 (+ 5)
% Row 2
\SetRowColor{LightBackground}
MUL & Multiply ax by what ever is specified (all unsigned) \tn 
% Row Count 9 (+ 2)
% Row 3
\SetRowColor{white}
CWD & convers the word in AX to a double word in DX:AX \tn 
% Row Count 11 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{3.833cm}{x{1.0299 cm} x{2.4031 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{3.833cm}}{\bf\textcolor{white}{Convert num to bytes}}  \tn
% Row 0
\SetRowColor{LightBackground}
ASCII & 1 byte per char \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
unsigned & 2 bytes for 5 chars \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
bcd & 2 bytes for 5 chars \tn 
% Row Count 3 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{3.833cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{3.833cm}}{\bf\textcolor{white}{code examples}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{3.833cm}}{{\bf{Write code that would find the sum 6+12+18...+300 and store it in var tot}} \newline MOV TOT, 0; MOV AX,6; LOOP: ADD TOT, AX; ADD AX, 6 CMP AX,300; JLE LOOP\{\{nl\}\} \newline {\bf{write code that is assembler equiv: if(x\textless{}y)\{x++;\}esle\{y+= 2\}}} \newline MOV AX, X; CMP AX,Y; JGW ELSE; ADD AX,1 JMP END; ELSE: ASS Y,2; END: \newline  \newline {\bf{move 500 bytes of data TABLE1 to TABLE 2 using MOVSB}} \newline LEA SI, TABLE1; LEA DI, TABLE2; MOV CX, 500; CLD; LPTOP: MOVSB; LOOP LPTOP \newline  \newline {\bf{MOVE 500 WORDS OF DATA FROM TABLE1 TO TABLE 2 USING INDEXING}} \newline MOV CX,500; MOV BX,0; LPTOP: MOV AX, TABLE1{[}BX{]}; MOV TABLE2{[}BX{]},AX; ADD BX, 2; LOOP LPTOP \newline  \newline {\bf{count the number of blanks in the 1000 byte string of chars referanced by table 1 using scasb}} \newline MOV AX, SEG TABLE1; MOV ES, AX; MOV AL, ' '; LEA DI, TABLE1; COV CNT,0; CLD; LPTOP: SC ASB; JNE: SKIP; INC CNT; SKIP: LOOP LPTOP} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{3.833cm}{x{0.99557 cm} x{2.43743 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{3.833cm}}{\bf\textcolor{white}{binary}}  \tn
% Row 0
\SetRowColor{LightBackground}
signed magnitude & Very left bit is 0 for + num and 1 for -num \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
twos compliment & flip the bits and add 1 \tn 
% Row Count 4 (+ 2)
% Row 2
\SetRowColor{LightBackground}
27 excises & add the num to 128 then convert to binary \tn 
% Row Count 6 (+ 2)
% Row 3
\SetRowColor{white}
ones compliment & flip all bits \tn 
% Row Count 8 (+ 2)
% Row 4
\SetRowColor{LightBackground}
unsigned & all bits count but its a positive num \tn 
% Row Count 10 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{3.833cm}{p{0.3433 cm} x{3.0897 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{3.833cm}}{\bf\textcolor{white}{Bit shifting}}  \tn
% Row 0
\SetRowColor{LightBackground}
RCR & rotate right last bite gets stored in carry and carry gets pushed to the first bite \tn 
% Row Count 3 (+ 3)
% Row 1
\SetRowColor{white}
SHL & Shift left into cf \tn 
% Row Count 4 (+ 1)
% Row 2
\SetRowColor{LightBackground}
TEST & The TEST operation sets the flags CF and OF to zero. The SF is set to the most significant bit of the result of the AND. If the result is 0, the ZF is set to 1, otherwise set to 0. The parity flag is set to the bitwise XNOR of the least significant byte of the result, 1 if the number of ones in that byte is even, 0 otherwise. The value of AF is undefined. \tn 
% Row Count 14 (+ 10)
% Row 3
\SetRowColor{white}
SAR & shift right into carry but keep the signed bit the same \tn 
% Row Count 16 (+ 2)
% Row 4
\SetRowColor{LightBackground}
CMC & invert CF \tn 
% Row Count 17 (+ 1)
% Row 5
\SetRowColor{white}
ROL & roatate left into the last bit and the carry flag \tn 
% Row Count 19 (+ 2)
% Row 6
\SetRowColor{LightBackground}
CLC & CF = 0 \tn 
% Row Count 20 (+ 1)
% Row 7
\SetRowColor{white}
STC & CF = 1 \tn 
% Row Count 21 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{3.833cm}{p{0.58361 cm} x{2.84939 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{3.833cm}}{\bf\textcolor{white}{adressing}}  \tn
% Row 0
\SetRowColor{LightBackground}
tab{[}di{]} & indexed adressing {[}offset + ds *10 + DI{]} \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
{[}bx{]}{[}di{]} & base indexing{[}reg 1 + reg 2 + ds * 10{]} \tn 
% Row Count 4 (+ 2)
% Row 2
\SetRowColor{LightBackground}
{[}si{]} & register indirect{[}ds*10 + reg1{]} \tn 
% Row Count 5 (+ 1)
% Row 3
\SetRowColor{white}
{[}bp{]} & base addressing{[}ss*10 + reg1{]} \tn 
% Row Count 6 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{3.833cm}{p{0.37763 cm} x{3.05537 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{3.833cm}}{\bf\textcolor{white}{Loads}}  \tn
% Row 0
\SetRowColor{LightBackground}
LODSB & loads al wiht copy of DS:SI. IF DF = 0 then si++ \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
LODSW & loads ax wiht copy of DS:SI. IF DF = 0 then si ++ \tn 
% Row Count 4 (+ 2)
% Row 2
\SetRowColor{LightBackground}
STOSB & replace byte pointed to by  ES:DI with a copy of AL and incs DI \tn 
% Row Count 6 (+ 2)
% Row 3
\SetRowColor{white}
STOSW & replace byte pointed to by  ES:DI with a copy of AX and incs DI \tn 
% Row Count 8 (+ 2)
% Row 4
\SetRowColor{LightBackground}
CLD & clears DF \tn 
% Row Count 9 (+ 1)
% Row 5
\SetRowColor{white}
STD & set DF \tn 
% Row Count 10 (+ 1)
% Row 6
\SetRowColor{LightBackground}
MOVSW & replaces byte pointed to by ES:DI with word at DS:SI. Moves SI:DI by 2 \tn 
% Row Count 12 (+ 2)
% Row 7
\SetRowColor{white}
MOVSB & copies the byte at {[}DS:SI{]} or {[}DS:ESI{]} to {[}ES:DI{]} or {[}ES:EDI{]}. It then increments or decrements (depending on the direction flag: increments if the flag is clear, decrements if it is set) SI and DI (or ESI and EDI). \tn 
% Row Count 19 (+ 7)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}


% That's all folks
\end{multicols*}

\end{document}