constant CBITS : integer := 32;
subtype csigned is signed((CBITS-1) downto 0);
- subtype divinteger is integer range -33 to 33;
+ subtype divinteger is unsigned(4 downto 0);
-- integer ist 32bit (31bit + sign)
subtype cinteger is integer;
- -- vorerst: 1 * 71
- constant H_RAM_SIZE : integer := 71;
- -- danach: 50 * 71 * 2 = 7100
- -- constant H_RAM_SIZE : integer := 7100;
+ -- 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(4 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 : csigned) return divinteger;
procedure icwait(signal clk_i : IN std_logic; cycles: natural);
-- http://www.marjorie.de/ps2/scancode-set2.htm
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_0 : std_logic_vector(7 downto 0) := x"45";
+ constant SC_1 : std_logic_vector(7 downto 0) := x"16";
+ constant SC_2 : std_logic_vector(7 downto 0) := x"1e";
+ constant SC_3 : std_logic_vector(7 downto 0) := x"26";
+ constant SC_4 : std_logic_vector(7 downto 0) := x"25";
+ constant SC_5 : std_logic_vector(7 downto 0) := x"2e";
+ constant SC_6 : std_logic_vector(7 downto 0) := x"36";
+ constant SC_7 : std_logic_vector(7 downto 0) := x"3d";
+ constant SC_8 : std_logic_vector(7 downto 0) := x"3e";
+ constant SC_9 : std_logic_vector(7 downto 0) := x"46";
+
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!
+ -- fuer deutsches layout, alle anderen zeichen sind unguenstig belegt
+ constant SC_PLUS : std_logic_vector(7 downto 0) := x"5b";
+
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
- function find_msb(a : csigned) return divinteger is
- variable r : divinteger := 0;
- begin
- for i in (CBITS-1) downto 0 loop
- exit when a(i) = '1';
- r := r+1;
- end loop;
- return (CBITS - r);
- end function find_msb;
-
procedure icwait(signal clk_i : IN std_logic; cycles: Natural) is
begin
for i in 1 to cycles loop
end loop;
end;
end package body gen_pkg;
-