diff --git a/.gitignore b/.gitignore
index 1915eb6..8173e9b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,3 +4,5 @@
 *.sym
 *.o
 *.lst
+.piolibdeps
+.vscode
\ No newline at end of file
diff --git a/README.md b/README.md
index b82a1c5..4d79bb4 100644
--- a/README.md
+++ b/README.md
@@ -87,7 +87,9 @@ Inside ASM folder you can find the woz_monitor_masm.asm source listing. This is
 
 The other sources you find there may be useful to debug the 6502 basic operations as you wire it.
 
-If you are under OSX - you can install MASM via HomeBrew and use it to compile any asm source included the one above.
+If you are under OSX - you can install MASM via HomeBrew and use it to compile any asm source included the one above:
+
+    brew install masm
 
 ## Apple 1 Address Space
           $0000-$0FFF ------------- 4KB Standard RAM
@@ -102,4 +104,4 @@ If you are under OSX - you can install MASM via HomeBrew and use it to compile a
 - https://coronax.wordpress.com/projects/project65/
 - http://archive.computerhistory.org/resources/text/Apple/Apple.AppleI.1976.102646518.pdf (apple 1 official manual)
 - https://en.wikipedia.org/wiki/WDC_65C02
-- http://www.westerndesigncenter.com/wdc/w65c21-chip.cfm
+- http://www.westerndesigncenter.com/wdc/w65c21-chip.cfm
\ No newline at end of file
diff --git a/src/main.cpp b/src/main.cpp
index 9b18dd8..e3419a3 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -17,6 +17,36 @@ const int RW_PIN      = 53; // TO 6502 R/W
 const int ADDRESS_PINS[]  = {44,45,2,3,4,5,6,7,8,9,10,11,12,13,46,47}; // TO ADDRESS PIN 1-15 6502
 const int DATA_PINS[]     = {33, 34, 35, 36, 37,38, 39, 40}; // TO DATA BUS PIN 0-7 6502
 
+/*
+                        W65C02S <--->  Arduino Due
+
+        3.3v      GND                          10uf ---- GND
+         |        |       +------\/------+      |
+         |        +----  1| VPB     /RES |40 ---+------- +RST BTN- ---- GND
+         +--- 3k3 -----  2| RDY    PHI2O |39
+         |               3| PHI1O    SOB |38
+         +--- 3k3 -----  4| IRQ     PHI2 |37 -------- 52
+         |               5| MLB       BE |36---3k3--------3.3v
+         +--- 3k3 -----  6| /NMI      NC |35
+         |               7| SYNC     R/W |34 -------- 53
+         +-------------  8| VDD       D0 |33 -------- 33
+           44 ---------  9| A0        D1 |32 -------- 34
+           45 --------- 10| A1        D2 |31 -------- 35
+            2 --------- 11| A2        D3 |30 -------- 36
+            3 --------- 12| A3        D4 |29 -------- 37
+            4 --------- 13| A4        D5 |28 -------- 38
+            5 --------- 14| A5        D6 |27 -------- 39
+            6 --------- 15| A6        D7 |26 -------- 40
+            7 --------- 16| A7       A15 |25 -------- 47
+            8 --------- 17| A8       A14 |24 -------- 46
+            9 --------- 18| A9       A13 |23 -------- 13
+           10 --------- 19| A10      A12 |22 -------- 12
+           11 --------- 20| A11      VSS |21 ---+
+                          +--------------+      |
+                                               GND
+*/
+
+
 const unsigned int ROM_ADDR       = 0xFF00; // ROM
 const unsigned int RAM_BANK1_ADDR = 0x0000; // RAM
 const unsigned int RAM_BANK2_ADDR = 0xE000; // EXTENDED RAM
@@ -336,4 +366,4 @@ void step() {
 
 void loop () {
     step();
-}
+}
\ No newline at end of file
diff --git a/src/rom.h b/src/rom.h
index 3097b23..4b5e3cd 100644
--- a/src/rom.h
+++ b/src/rom.h
@@ -1,5 +1,5 @@
 
-// WAZ MONITOR (Original Apple 1 ROM)
+// WOZ MONITOR (Original Apple 1 ROM)
 const uint8_t ROM[] = {0xD8, 0x58, 0xA0, 0x7F, 0x8C, 0x12, 0xD0, 0xA9,
 0xA7, 0x8D, 0x11, 0xD0, 0x8D, 0x13, 0xD0, 0xC9,
 0xDF, 0xF0, 0x13, 0xC9, 0x9B, 0xF0, 0x03, 0xC8,
@@ -31,4 +31,4 @@ const uint8_t ROM[] = {0xD8, 0x58, 0xA0, 0x7F, 0x8C, 0x12, 0xD0, 0xA9,
 0x4A, 0x20, 0xE5, 0xFF, 0x68, 0x29, 0x0F, 0x09,
 0xB0, 0xC9, 0xBA, 0x90, 0x02, 0x69, 0x06, 0x2C,
 0x12, 0xD0, 0x30, 0xFB, 0x8D, 0x12, 0xD0, 0x60,
-0x00, 0x00, 0x00, 0x0F, 0x00, 0xFF, 0x00, 0x00};
+0x00, 0x00, 0x00, 0x0F, 0x00, 0xFF, 0x00, 0x00};
\ No newline at end of file