diff --git a/include/aeb_fate_opcodes.hrl b/include/aeb_fate_opcodes.hrl
index b2c5da0..fbe0b27 100644
--- a/include/aeb_fate_opcodes.hrl
+++ b/include/aeb_fate_opcodes.hrl
@@ -111,6 +111,7 @@
 -define('BITS_ALLA'      , 16#70).
 -define('INCA'           , 16#71).
 -define('DECA'           , 16#72).
+-define('POPA'           , 16#73).
 
 -define('FUNCTION'       , 16#fe).
 -define('EXTEND'         , 16#ff).
diff --git a/src/aeb_fate_asm.erl b/src/aeb_fate_asm.erl
index da2b02d..40d235a 100644
--- a/src/aeb_fate_asm.erl
+++ b/src/aeb_fate_asm.erl
@@ -83,7 +83,7 @@ to_args(Tokens) ->
         {Arg, [{')', _} |  Rest]} ->
             {[Arg], Rest}
     end.
-    
+
 to_data([{int,_line, Int}|Rest]) ->
     {Int, Rest};
 to_data([{boolean,_line, Bool}|Rest]) ->
diff --git a/src/aeb_fate_asm_scan.xrl b/src/aeb_fate_asm_scan.xrl
index 889ac2d..fce9f27 100644
--- a/src/aeb_fate_asm_scan.xrl
+++ b/src/aeb_fate_asm_scan.xrl
@@ -31,7 +31,6 @@ false          : {token, {boolean, TokenLine, false}}.
 RETURN         : {token, {mnemonic, TokenLine, 'RETURN'}}.
 RETURNR        : {token, {mnemonic, TokenLine, 'RETURNR'}}.
 CALL           : {token, {mnemonic, TokenLine, 'CALL'}}.
-FUNCTION       : {token, {function, TokenLine, 'FUNCTION' }}.
 NOP            : {token, {mnemonic, TokenLine, 'NOP'}}.
 
 CALL_R         : {token, {mnemonic, TokenLine, 'CALL_R'}}.
@@ -46,6 +45,7 @@ SWITCH_V5      : {token, {mnemonic, TokenLine, 'SWITCH_V5'}}.
 
 PUSH           : {token, {mnemonic, TokenLine, 'PUSH'}}.
 DUP            : {token, {mnemonic, TokenLine, 'DUP'}}.
+DUPA           : {token, {mnemonic, TokenLine, 'DUPA'}}.
 POP            : {token, {mnemonic, TokenLine, 'POP'}}.
 
 STORE          : {token, {mnemonic, TokenLine, 'STORE'}}.
@@ -138,6 +138,9 @@ ABORT          : {token, {mnemonic, TokenLine, 'ABORT'}}.
 EXIT           : {token, {mnemonic, TokenLine, 'EXIT'}}.
 DEACTIVATE     : {token, {mnemonic, TokenLine, 'DEACTIVATE'}}.
 COMMENT        : {token, {mnemonic, TokenLine, 'COMMENT'}}.
+
+FUNCTION       : {token, {function, TokenLine, 'FUNCTION' }}.
+
 {ID} :
  {token, {id, TokenLine, TokenChars}}.
 {HEX} :
diff --git a/src/aeb_fate_code.erl b/src/aeb_fate_code.erl
index 75e28b0..e6ad225 100644
--- a/src/aeb_fate_code.erl
+++ b/src/aeb_fate_code.erl
@@ -219,7 +219,10 @@ bits_diff(To, Bits, Bit) ->
     {'BITS_DIFF', To, Bits, Bit}.
 
 dup() ->
-    'DUP'.
+    'DUPA'.
+
+dup(N) when is_integer(N) ->
+    {'DUP', ?i(N)}.
 
 pop() ->
     'POP'.
diff --git a/src/aeb_fate_opcodes.erl b/src/aeb_fate_opcodes.erl
index 584616e..9240793 100644
--- a/src/aeb_fate_opcodes.erl
+++ b/src/aeb_fate_opcodes.erl
@@ -34,6 +34,7 @@ mnemonic(?JUMP)        ->    'JUMP' ;
 mnemonic(?JUMPIF)      ->    'JUMPIF' ;
 mnemonic(?PUSH)        ->    'PUSH' ;
 mnemonic(?DUP)         ->    'DUP' ;
+mnemonic(?DUPA)        ->    'DUPA' ;
 mnemonic(?POP)         ->    'POP' ;
 mnemonic(?STORE)       ->    'STORE' ;
 mnemonic(?ADD)         ->    'ADD' ;
@@ -148,6 +149,7 @@ m_to_op('JUMP')        ->    ?JUMP ;
 m_to_op('JUMPIF')      ->    ?JUMPIF ;
 m_to_op('PUSH')        ->    ?PUSH ;
 m_to_op('DUP')         ->    ?DUP ;
+m_to_op('DUPA')        ->    ?DUPA ;
 m_to_op('POP')         ->    ?POP ;
 m_to_op('STORE')       ->    ?STORE ;
 m_to_op('ADD')         ->    ?ADD ;
@@ -256,6 +258,7 @@ args(?NOP)        -> 0;
 args(?RETURN)     -> 0;
 args(?INCA)       -> 0;
 args(?DECA)       -> 0;
+args(?DUPA)       -> 0;
 args(?BITS_NONEA) -> 0;
 args(?BITS_ALLA)  -> 0;