diff --git a/src/cpu.ts b/src/cpu.ts
index 53d827c..9141d1f 100644
--- a/src/cpu.ts
+++ b/src/cpu.ts
@@ -11,15 +11,15 @@ const STACK_SIZE = 16;
 const REGISTERS = 16;
 
 class CPU {
-	pc: number; // 16b
-	indexReg: number; // 16b
+	pc: number; 			// 16b
+	indexReg: number; 		// 16b
 	regs: Uint8Array;
 
-	delayTimer: number; // 8b
-	soundTimer: number; // 8b
+	delayTimer: number; 	// 8b
+	soundTimer: number; 	// 8b
 
-	stackPointer: number; // 16b
-	stack: Uint16Array;
+	stackPointer: number; 	// 16b
+	stack: Uint16Array;		// 16b
 
 	memory: Uint8Array;
 	displayMemory: Uint8Array;
@@ -27,9 +27,7 @@ class CPU {
 	keyboard: Keyboard;
 	audio: Chip8Audio;
 
-
-	rng: RNG;
-	
+	rng: RNG;	
 
 	constructor(keyboard: Keyboard, audio: Chip8Audio) {
 		this.memory = new Uint8Array(MEMORY_SIZE);
@@ -77,7 +75,7 @@ class CPU {
 
 
 	private setupFont() {
-		// Using address from 050 - 09F ??
+		// Using address from 050 - 09F
 		let addressFont = 0x050;
 		
 		// Every character has 5 Bytes
@@ -104,7 +102,7 @@ class CPU {
 	}
 
 	public loadRom(rom: Uint8Array) {
-		// Loads a ROM into starting PC addres??
+		// Loads a ROM into starting PC address
 		console.log(rom);
 		for(let i = 0; i < rom.length; i++) {
 			this.memory[this.pc+i] = rom[i];
@@ -283,8 +281,8 @@ class CPU {
 					// Vx <<= 1
 					// Set VF to 1 if the most significant bit of VX.
 					// Then shift to the left Vx
-					this.regs[0xF] = (this.regs[nib2]) >> 7;
-					this.regs[nib2] = (this.regs[nib2] << 1);
+					this.regs[0xF] = (this.regs[nib2]) >> 7; // Get msb
+					this.regs[nib2] = (this.regs[nib2] << 1) & 0xFF;
 					this.incrementPC();
 				}
 
@@ -391,7 +389,7 @@ class CPU {
 					}
 
 					if(!keyPressed)
-						return; // NOT INCREMENT PC SO WE ARE STUCK IN THIS WAITING
+						return; // NOT INCREMENT PC SO WE ARE STUCK IN THIS WAITING (also don't decrement timers???)
 
 					this.incrementPC();
 				}else if(secondOpcode == 0x15) {