Update turbosound.

rtl/sound/jt12/jt03_acc.v

@@ -0,0 +1,66 @@
+/* This file is part of JT12.
+
+ 
+    JT12 program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    JT12 program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with JT12.  If not, see <http://www.gnu.org/licenses/>.
+
+    Author: Jose Tejada Gomez. Twitter: @topapate
+    Version: 1.0
+    Date: 15-11-2018
+
+*/
+
+`timescale 1ns / 1ps
+
+/* Use for YM2203
+    no left/right channels
+    full operator resolution
+    clamped to maximum output of signed 16 bits */
+
+module jt03_acc
+(
+    input               rst,
+    input               clk,
+    input               clk_en,
+    input signed [13:0] op_result,
+    input               s1_enters,
+    input               s2_enters,
+    input               s3_enters,
+    input               s4_enters,
+    input               zero,
+    input   [2:0]       alg,
+    // combined output
+    output signed [15:0] snd
+);
+
+reg sum_en;
+
+always @(*) begin
+    case ( alg )
+        default: sum_en = s4_enters;
+        3'd4: sum_en = s2_enters | s4_enters;
+        3'd5,3'd6: sum_en = ~s1_enters;        
+        3'd7: sum_en = 1'b1;
+    endcase
+end
+
+jt12_single_acc #(.win(14),.wout(16)) u_mono(
+    .clk        ( clk            ),
+    .clk_en     ( clk_en         ),
+    .op_result  ( op_result      ),
+    .sum_en     ( sum_en         ),
+    .zero       ( zero           ),
+    .snd        ( snd            )
+);
+
+endmodule