Started to mess around with setting up the figure for the layout of the registers and main memory.

chapter 1.tex

@@ -8,22 +8,25 @@ Eight 32-bit general purpose registers are available for holding operands and me
 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
-	\begin{tikzpicture}
-		\node at (1 ,0) {31};
-		%\node [Rect] at (0, 2) {test};
-		%\node at (0, )
+\def\minY{-5} \def\maxY{5}
+\def\minX{-5} \def\maxX{5}
+\begin{figure}[h]
+	\centering
+	\begin{tikzpicture}[node distance=0cm]
+		\node [draw, fit={(\minX, 0) (0, 0.5)}, label=center:Status Register (Flags)] (flags) {};
+		%\draw (\minX,0.5) node[above=1em] {31} rectangle (0, 1) node[midway] {Status Register (Flags)} node[above] (lsb) {0};
+		\draw (flags);
+		\node[above left=of flags] {31};
+		\node[above right=of flags] {0};
+		
+		%\draw (\minX,-\pos / 2 - 0.5) rectangle (0, -\pos / 2) node[midway] (register1) {r1};
+		
 		\foreach \pos in {1,...,8} {
-			%\node at (0, \pos + 1) [blockRow] (\pos) {\pos};
-			\node at (0, \pos - 1) [blockRow] {r\pos};
-		;}
-		%\node [blockRow] (start) {r1};
-		%\node (r2) [blockRow] [below=of start] {r2};
+			\draw (\minX,-\pos / 2 - 0.5) rectangle (0, -\pos / 2) node[midway] (register\pos) {r\pos};
+		}
+		%\draw node[above=of register1] {General Purpose Registers};
+		
+		\draw (\maxX / 2, 1) rectangle (\maxX, \minY) node[midway] {Memory};
 	\end{tikzpicture}
 	\caption{Register Bit Layout}
 \end{figure}