+ subtype divinteger is unsigned(4 downto 0);
+ -- integer ist 32bit (31bit + sign)
+ subtype cinteger is integer;
+
+ -- 50 zeilen * 71 zeichen * 2 (berechnung + ergebnis) = 7100 bytes
+ constant H_RAM_SIZE : integer := 7100;
+ constant H_RAM_WIDTH : integer := log2c(H_RAM_SIZE);
+ subtype hspalte is std_logic_vector(6 downto 0);
+ subtype hzeile is std_logic_vector(6 downto 0);
+ subtype hbyte is std_logic_vector(7 downto 0);
+ subtype hstring is string(1 to 72);
+ subtype hstr_int is integer range 0 to 72;
+
+ function find_msb(a : std_logic_vector) return std_logic_vector;
+ 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";