+ 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 hspalte_max : integer := 71;
+ constant hzeile_max : integer := 50;
+ 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;
+
+ procedure icwait(signal clk_i : IN std_logic; cycles: natural);
+
+ function ascii2sc (x : hbyte) return hbyte;
+ function valid_char (x : hbyte) return boolean;
+
+ -- http://www.marjorie.de/ps2/scancode-set2.htm
+ constant SC_KP_0 : hbyte := x"70";
+ constant SC_KP_1 : hbyte := x"69";
+ constant SC_KP_2 : hbyte := x"72";
+ constant SC_KP_3 : hbyte := x"7a";
+ constant SC_KP_4 : hbyte := x"6b";
+ constant SC_KP_5 : hbyte := x"73";
+ constant SC_KP_6 : hbyte := x"74";
+ constant SC_KP_7 : hbyte := x"6c";
+ constant SC_KP_8 : hbyte := x"75";
+ constant SC_KP_9 : hbyte := x"7d";
+
+ constant SC_0 : hbyte := x"45";
+ constant SC_1 : hbyte := x"16";
+ constant SC_2 : hbyte := x"1e";
+ constant SC_3 : hbyte := x"26";
+ constant SC_4 : hbyte := x"25";
+ constant SC_5 : hbyte := x"2e";
+ constant SC_6 : hbyte := x"36";
+ constant SC_7 : hbyte := x"3d";
+ constant SC_8 : hbyte := x"3e";
+ constant SC_9 : hbyte := x"46";
+
+ constant SC_KP_PLUS : hbyte := x"79";
+ constant SC_KP_MINUS : hbyte := x"7b";
+ constant SC_KP_MUL : hbyte := x"7c";
+ constant SC_KP_DIV : hbyte := x"4a"; -- inkl. 0xe0!
+
+ -- fuer deutsches layout, alle anderen zeichen sind unguenstig belegt
+ constant SC_PLUS : hbyte := x"5b";
+
+ constant SC_ENTER : hbyte := x"5a";
+ constant SC_BKSP : hbyte := x"66";
+ constant SC_SPACE : hbyte := x"29";