From 9c9735c095f948967c200c9cf179425520d4fa0f Mon Sep 17 00:00:00 2001
From: Lee Morgan <leemorgan@me.com>
Date: Thu, 25 Jun 2015 19:56:31 -0400
Subject: [PATCH] Removed increment of register I in opcode 0xF055 and 0xF065.
 The original CHIP-8 design incremented I. However, on current implementations
 I is left unchanged. Reference:
 https://en.wikipedia.org/wiki/CHIP-8#cite_note-memi-4

---
 Chip8/Chip8.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/Chip8/Chip8.c b/Chip8/Chip8.c
index 75a7d6f..30a3266 100644
--- a/Chip8/Chip8.c
+++ b/Chip8/Chip8.c
@@ -44,7 +44,7 @@
  The Chip8 system has a HEX based keypad (0x0 - 0xF).
  
  Opcode Table
- • NNN		address
+ • NNN		12-bit address
  • NN		8-bit constant
  • N		4-bit constant
  • X and Y	4-bit register identifier
@@ -562,7 +562,6 @@ void emulateCycle() {
 			for (unsigned char r = 0; r <= X; r++) {
 				memory[I+r] = V[r];
 			}
-			I = I + X + 1;
 			pc += 2;
 		}
 		else if (submaskedOpcode == 0x0065) {
@@ -570,7 +569,6 @@ void emulateCycle() {
 			for (unsigned char r = 0; r <= X; r++) {
 				V[r] = memory[I+r];
 			}
-			I = I + X + 1;
 			pc += 2;
 		}
 		else {