diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..40a2eaf
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,6 @@
+/*
+!/disassembler.pas
+!/emulator.pas
+!/.gitignore
+!/license.md
+!/readme.md
diff --git a/disassembler.pas b/disassembler.pas
index 7e04a70..9b1a76c 100644
--- a/disassembler.pas
+++ b/disassembler.pas
@@ -3,8 +3,8 @@ program Disassembler;
 uses Crt, Sysutils;
 
 var
-    Op, Regs: 0 .. $f; //Opcode
-    X, Y: 0 .. 3; //Register arguments
+    Op, Regs: 0 .. $f; //Opcode, and register arguments in a single variable
+    X, Y: 0 .. 3; //Register arguments in separate variables
     Addr, IP, EP: word; //Address argument and instruction and end pointers
     Opcodes: array [0 .. $f] of string; //Opcodes in human readable form
     Bin: array [0 .. $ffef] of byte; //Program in binary form
@@ -30,7 +30,7 @@ begin
     Opcodes [$e] := 'CLEQ    ';
     Opcodes [$f] := 'CLNEQ   ';
 
-    //Initialise the pointer
+    //Initialise the instruction pointer
     IP := 0;
 
     //Read a program file and check for errors