marked unused instruction opcodes as OpCode_NAx

1 files changed, 4 insertions, 4 deletions

diff --git a/zpu/hdl/zpu4/core/zpupkg.vhd b/zpu/hdl/zpu4/core/zpupkg.vhd
index f3800b0..e8d54a3 100644
--- a/zpu/hdl/zpu4/core/zpupkg.vhd
+++ b/zpu/hdl/zpu4/core/zpupkg.vhd
@@ -114,9 +114,9 @@ package zpupkg is
 	constant	OpCode_Short	: std_logic_vector(7 downto 4) := "0000";

 	

 	constant	OpCode_Break	: std_logic_vector(3 downto 0) := "0000";

-	constant	OpCode_Shiftleft: std_logic_vector(3 downto 0) := "0001";

+	constant	OpCode_NA4      : std_logic_vector(3 downto 0) := "0001";

 	constant	OpCode_PushSP	: std_logic_vector(3 downto 0) := "0010";

-	constant	OpCode_PushInt	: std_logic_vector(3 downto 0) := "0011";

+	constant	OpCode_NA3		: std_logic_vector(3 downto 0) := "0011";

 	

 	constant	OpCode_PopPC	: std_logic_vector(3 downto 0) := "0100";

 	constant	OpCode_Add		: std_logic_vector(3 downto 0) := "0101";

@@ -130,8 +130,8 @@ package zpupkg is
 	

 	constant	OpCode_Store	: std_logic_vector(3 downto 0) := "1100";

 	constant	OpCode_PopSP	: std_logic_vector(3 downto 0) := "1101";

-	constant	OpCode_Compare	: std_logic_vector(3 downto 0) := "1110";

-	constant	OpCode_PopInt	: std_logic_vector(3 downto 0) := "1111";

+	constant	OpCode_NA2		: std_logic_vector(3 downto 0) := "1110";

+	constant	OpCode_NA		: std_logic_vector(3 downto 0) := "1111";

 	

 	constant	OpCode_Lessthan				: std_logic_vector(5 downto 0) := std_logic_vector(to_unsigned(36, 6));

 	constant	OpCode_Lessthanorequal		: std_logic_vector(5 downto 0) := std_logic_vector(to_unsigned(37, 6));