Add OPCodes package with sprite operation constants

libs/OPCodes.vhd

@@ -0,0 +1,21 @@
+library ieee;
+use ieee.std_logic_1164.all;
+
+package OPCodes is
+
+    --@ No operation OP-Code
+    constant K_OP_NOP : std_logic_vector(3 downto 0) := "0000";
+    --@ OP-Code for new line
+    constant K_OP_NEWLINE : std_logic_vector(3 downto 0) := "0001";
+    --@ OP-Code for set sprite ID
+    constant K_OP_SET_ID : std_logic_vector(3 downto 0) := "0010";
+    --@ OP-Code for set X position
+    constant K_OP_SET_X : std_logic_vector(3 downto 0) := "0011";
+    --@ OP-Code for set Y position
+    constant K_OP_SET_Y : std_logic_vector(3 downto 0) := "0100";
+    --@ OP-Code for request sprite data for row
+    constant K_OP_REQ_ROW_DATA : std_logic_vector(3 downto 0) := "0101";
+    --@ OP-Code for clear all
+    constant K_OP_CLEAR_ALL : std_logic_vector(3 downto 0) := "1111";
+
+end package OPCodes;