Update turbosound.

rtl/sound/jt12/jt12.vhd

@@ -0,0 +1,43 @@
+library IEEE;
+use IEEE.std_logic_1164.all;
+
+package jt12 is 
+
+component jt12
+port
+(
+    rst        : in  std_logic;
+    clk        : in  std_logic;         -- CPU clock
+    cen        : in  std_logic := '1';  -- optional clock enable, if not needed leave as '1'
+    din        : in  std_logic_vector(7 downto 0);
+    addr       : in  std_logic_vector(1 downto 0);
+    cs_n       : in  std_logic;
+    wr_n       : in  std_logic;
+
+    dout       : out std_logic_vector(7 downto 0);
+    irq_n      : out std_logic;
+
+    -- combined output
+    snd_right  : out std_logic_vector(15 downto 0); -- signed
+    snd_left   : out std_logic_vector(15 downto 0); -- signed
+    snd_sample : out std_logic
+);
+end component;
+
+component jt12_genmix
+port 
+(
+    rst     : in  std_logic;
+    clk     : in  std_logic;    -- expects 54 MHz clock
+    fm_left : in  std_logic_vector(15 downto 0); -- FM at 55kHz
+    fm_right: in  std_logic_vector(15 downto 0); -- FM at 55kHz
+    psg_snd : in  std_logic_vector(10 downto 0); -- PSG at 220kHz
+    fm_en   : in  std_logic;
+    psg_en  : in  std_logic;
+    -- Mixed sound at 54 MHz
+    snd_left  : out std_logic_vector(15 downto 0);
+    snd_right : out std_logic_vector(15 downto 0)
+);
+end component;
+
+end;