Subversion Repositories yavga

--      Package File Template

--

--      Purpose: This package defines supplemental types, subtypes, 

--               constants, and functions 

library IEEE;

use IEEE.STD_LOGIC_1164.all;

package yavga_pkg is

-- Declare constants

  -- chars address and data bus size

  constant c_CHR_ADDR_BUS_W : integer := 11;

  constant c_CHR_DATA_BUS_W : integer := 32;

  constant c_CHR_WE_BUS_W   : integer := 4;

  -- internal used chars address and data bus size 

  constant c_INTCHR_ADDR_BUS_W : integer := 13;

  constant c_INTCHR_DATA_BUS_W : integer := 8;

  -- internal ROM chmaps address and data bus

  constant c_INTCHMAP_ADDR_BUS_W : integer := 11;

  constant c_INTCHMAP_DATA_BUS_W : integer := 8;

  -- waveform address and data bus size

  constant c_WAVFRM_ADDR_BUS_W : integer := 10;

  constant c_WAVFRM_DATA_BUS_W : integer := 16;

  constant c_GRID_SIZE : std_logic_vector(6 downto 0) := "1111111";

  constant c_GRID_BIT  : integer                      := 6;

  --

  -- horizontal timing signals (in pixels count )

  constant c_H_DISPLAYpx    : integer := 800;

  constant c_H_BACKPORCHpx  : integer := 63;  -- also 60;

  constant c_H_SYNCTIMEpx   : integer := 120;

  constant c_H_FRONTPORCHpx : integer := 56;  --also 60;

  constant c_H_PERIODpx     : integer := c_H_DISPLAYpx +

                                         c_H_BACKPORCHpx +

                                         c_H_SYNCTIMEpx +

                                         c_H_FRONTPORCHpx;

  constant c_H_COUNT_W : integer := 11;       -- = ceil(ln2(c_H_PERIODpx))

  --

  -- vertical timing signals (in lines count)

  constant c_V_DISPLAYln    : integer := 600;

  constant c_V_BACKPORCHln  : integer := 23;

  constant c_V_SYNCTIMEln   : integer := 6;

  constant c_V_FRONTPORCHln : integer := 37;

  constant c_V_PERIODln     : integer := c_V_DISPLAYln +

                                         c_V_BACKPORCHln +

                                         c_V_SYNCTIMEln +

                                         c_V_FRONTPORCHln;

  constant c_V_COUNT_W : integer := 10;  -- = ceil(ln2(c_V_PERIODln))

  constant c_X_W : integer := c_H_COUNT_W;

  constant c_Y_W : integer := c_V_COUNT_W;

--  constant c_CHARS_WIDTH: std_logic_vector(2 downto 0) := "111";

--  constant c_CHARS_HEIGHT: std_logic_vector(3 downto 0) := "1111";

--  constant c_CHARS_COLS: std_logic_vector(6 downto 0) := "1100011";

--  constant c_CHARS_ROWS: std_logic_vector(5 downto 0) := "100100";

  -- to manage the background and cursor colors

  constant c_CFG_BG_CUR_COLOR_ADDR : std_logic_vector(12 downto 0) := "0000001101100";  -- 108 BG:5..3 CUR:2..0

  -- to manage the cursor position  

  constant c_CFG_CURS_XY1 : std_logic_vector(12 downto 0) := "0000001101101";  -- 109

  constant c_CFG_CURS_XY2 : std_logic_vector(12 downto 0) := "0000001101110";  -- 110

  constant c_CFG_CURS_XY3 : std_logic_vector(12 downto 0) := "0000001101111";  -- 111

end yavga_pkg;

package body yavga_pkg is

end yavga_pkg;