history/display: backspace logic

[hwmod.git] / src / gen_pkg.vhd

diff --git a/src/gen_pkg.vhd b/src/gen_pkg.vhd
index 0121290ea83713e69ca9dcf0598ed72ec171e775..b4ed94d53f72888d826e14829477631ebb2bc28e 100644 (file)
--- a/src/gen_pkg.vhd
+++ b/src/gen_pkg.vhd
@@ -1,6 +1,7 @@
 library ieee;
 use ieee.std_logic_1164.all;
 use ieee.numeric_std.all;
+use work.math_pkg.all;
 
 package gen_pkg is
        subtype alu_ops is std_logic_vector(2 downto 0);
@@ -17,14 +18,38 @@ package gen_pkg is
        -- integer ist 32bit (31bit + sign)
        subtype cinteger is integer;
 
+       -- TODO: 50 * 71 * 2 = 7100
+       constant H_RAM_SIZE : integer := 71;
+       constant H_RAM_WIDTH : integer := log2c(H_RAM_SIZE);
        subtype hspalte is std_logic_vector(6 downto 0);
        subtype hzeile is std_logic_vector(4 downto 0);
        subtype hbyte is std_logic_vector(7 downto 0);
-       subtype hstring is string(1 to 71);
+       subtype hstring is string(1 to 72);
        subtype hstr_int is integer range 0 to 72;
 
        function find_msb(a : csigned) return divinteger;
        procedure icwait(signal clk_i : IN std_logic; cycles: natural);
+
+       -- http://www.marjorie.de/ps2/scancode-set2.htm
+       constant SC_KP_0 : std_logic_vector(7 downto 0) := x"70";
+       constant SC_KP_1 : std_logic_vector(7 downto 0) := x"69";
+       constant SC_KP_2 : std_logic_vector(7 downto 0) := x"72";
+       constant SC_KP_3 : std_logic_vector(7 downto 0) := x"7a";
+       constant SC_KP_4 : std_logic_vector(7 downto 0) := x"6b";
+       constant SC_KP_5 : std_logic_vector(7 downto 0) := x"73";
+       constant SC_KP_6 : std_logic_vector(7 downto 0) := x"74";
+       constant SC_KP_7 : std_logic_vector(7 downto 0) := x"6c";
+       constant SC_KP_8 : std_logic_vector(7 downto 0) := x"75";
+       constant SC_KP_9 : std_logic_vector(7 downto 0) := x"7d";
+
+       constant SC_KP_PLUS : std_logic_vector(7 downto 0) := x"79";
+       constant SC_KP_MINUS : std_logic_vector(7 downto 0) := x"7b";
+       constant SC_KP_MUL : std_logic_vector(7 downto 0) := x"7c";
+       constant SC_KP_DIV : std_logic_vector(7 downto 0) := x"4a"; -- inkl. 0xe0!
+
+       constant SC_ENTER : std_logic_vector(7 downto 0) := x"5a";
+       constant SC_BKSP : std_logic_vector(7 downto 0) := x"66";
+       constant SC_SPACE : std_logic_vector(7 downto 0) := x"29";
 end package gen_pkg;
 
 package body gen_pkg is