diff --git a/Bally - Astrocade_MiST/ReadMe.md b/Bally - Astrocade_MiST/ReadMe.md
index 1e96aa27..2c65d71b 100644
--- a/Bally - Astrocade_MiST/ReadMe.md	
+++ b/Bally - Astrocade_MiST/ReadMe.md	
@@ -1,2 +1,21 @@
 Untestet need Feedback
 
+
+Copy from bally_ps2_if.vhd will be changed
+
+  -- port 7  6  5  4  3  2  1  0
+  -- x10           tg rt lt dn up | player 1
+  -- x11           tg rt lt dn up | player 2
+  -- x12           tg rt lt dn up | player 3
+  -- x13           tg rt lt dn up | player 4
+
+
+  -- bit x17 x16 x15 x14    maps to pc key
+  --
+  -- 0    c   ^   v  %      z  a  q  1
+  -- 1    mr  ms  ch /      x  s  w  2
+  -- 2    7   8   9  x      c  d  e  3
+  -- 3    4   5   6  -      v  f  r  4
+  -- 4    1   2   3  +      b  g  t  5
+  -- 5    ce  0   .  =      n  h  y  6
+