Added the start of a second chapter for the ISA itself.

chapter 1.tex

@@ -1,17 +1,26 @@
 \chapter{Overview}
 This is an attempt to distill what I know about how computers work into some kind of emulator / simulator. I'm curious to see if what I know at the moment is enough to allow me to emulate a general purpose computer. A computer that will be big-endian, using 8-bit bytes for its char type. The memory is a 32 bit linear address space allowing for a maximum of 2\textsuperscript{32} bytes to be addressable.
 \section{Registers}
-Eight 32-bit general purpose registers are available for holding operands and memory addresses along with a Flags Register. The Flags Register is a 32-bit register allowing for 32 flags. Currently there are only arithmetic flags which are Overflow (OF), Underflow (UF), and a Zero Flag (ZF). The overflow flag is set if there is a carry. A base pointer register contains a 32 bit address that points to the start of the current stack frame, which is the first opcode of the stack frame. Therefore the first argument would be addressed as such: mov r1, bp - sizeof(void *). Finally we have the Program Counter which contains a 32 bit address that contains the next instruction to execute.
+Eight 32-bit general purpose registers are available for holding operands and memory addresses along with a Flags Register. The Flags Register is a 32-bit register allowing for 32 flags. Currently there are only arithmetic flags which are Overflow (OF), Underflow (UF), and a Zero Flag (ZF). The overflow flag is set if there is a carry. A base pointer register contains a 32 bit address that points to the start of the current stack frame, which is the first opcode of the stack frame. Therefore the first argument would be addressed as such:
+\begin{verbatim} 
+	mov r1, bp - sizeof(void *) 
+\end{verbatim}
+Finally we have the Program Counter which contains a 32 bit address that points to the next instruction to execute.
 \tikzstyle{blockRow} = [rectangle, minimum width=10cm, minimum height=0.5cm, text centered, draw=black]
+
 %Note: tikzset might be better to use instead of tikzstyle.
+\tikzset{
+	Rect/.style = {rectangle, fill=red!10!white}
+}
 \begin{figure}[!htb]
-	\centering
+	%\centering
 	\begin{tikzpicture}
-		\node at (0, 0) {31};
+		\node at (1 ,0) {31};
+		%\node [Rect] at (0, 2) {test};
 		%\node at (0, )
 		\foreach \pos in {1,...,8} {
 			%\node at (0, \pos + 1) [blockRow] (\pos) {\pos};
-			\node at (0, \pos) [blockRow] {r\pos};
+			\node at (0, \pos - 1) [blockRow] {r\pos};
 		;}
 		%\node [blockRow] (start) {r1};
 		%\node (r2) [blockRow] [below=of start] {r2};

chapter 2.tex

@@ -0,0 +1,10 @@
+\chapter{Instruction Set Architecture}
+\section{Encoding}
+\def\minY{0} \def\maxY{0.5}
+\def\minX{-7} \def\maxX{7}
+
+\begin{tikzpicture}
+	\draw (\minX, \minY) -- (\maxX, \minY);
+	\draw (\minX, \minY) -- (\minX, \maxY) node[above] {31}; %{$y$}; Note the $'s, those make something math stylized.
+	\draw (\maxX, \minY) -- (\maxX, \maxY) node[above]{0};
+\end{tikzpicture}

document.tex

@@ -13,6 +13,7 @@
 	
 	\tableofcontents
 	\include{chapter 1}
+	\include{chapter 2}
 	
 \end{document}