diff --git a/files.qip b/files.qip
index 9771ad0..fe1a8e0 100644
--- a/files.qip
+++ b/files.qip
@@ -13,10 +13,10 @@ set_global_assignment -name VERILOG_FILE rtl/periph/vdac.v
 set_global_assignment -name VERILOG_FILE rtl/periph/zifi.v
 set_global_assignment -name VERILOG_FILE rtl/periph/uart_tx.v
 set_global_assignment -name VERILOG_FILE rtl/periph/uart_rx.v
-set_global_assignment -name VHDL_FILE rtl/sound/soundrive.vhd
 set_global_assignment -name QIP_FILE rtl/sound/jt12/jt03.qip
 set_global_assignment -name SYSTEMVERILOG_FILE rtl/sound/turbosound.sv
 set_global_assignment -name SYSTEMVERILOG_FILE rtl/sound/saa1099.sv
+set_global_assignment -name VERILOG_FILE rtl/sound/soundrive.v
 set_global_assignment -name VERILOG_FILE rtl/sound/gs.v
 set_global_assignment -name VERILOG_FILE rtl/sound/gs_top.v
 set_global_assignment -name VERILOG_FILE rtl/sound/compressor.v
diff --git a/rtl/sound/soundrive.v b/rtl/sound/soundrive.v
new file mode 100644
index 0000000..cdd7809
--- /dev/null
+++ b/rtl/sound/soundrive.v
@@ -0,0 +1,47 @@
+// SOUNDRIVE 1.05 PORTS mode 1
+// #0F = left channel A (stereo covox channel 1)
+// #1F = left channel B
+// #4F = right channel C (stereo covox channel 2)
+// #5F = right channel D
+
+// #FB = right channel D + left channel B
+
+module soundrive
+(
+    input            reset,
+    input            clk,
+    input            cs,
+    input      [7:0] a,
+    input      [7:0] di,
+    input            wr_n,
+    input            iorq_n,
+    input            dos,
+    output reg [7:0] outa,
+    output reg [7:0] outb,
+    output reg [7:0] outc,
+    output reg [7:0] outd
+);
+
+
+always @(posedge clk) begin
+  if (reset || !cs) begin
+    outa <= 0;
+    outb <= 0;
+    outc <= 0;
+    outd <= 0;
+  end
+  else begin
+    if (!iorq_n && !wr_n && !dos) begin
+      case (a)
+      8'h0F: outa <= di;
+      8'h1F: outb <= di;
+      8'h4F: outc <= di;
+      8'h5F: outd <= di;
+      8'hFB: begin outd <= di; outb <= di; end
+      endcase
+    end
+  end
+end
+
+
+endmodule
diff --git a/rtl/sound/soundrive.vhd b/rtl/sound/soundrive.vhd
deleted file mode 100644
index 8df9b78..0000000
--- a/rtl/sound/soundrive.vhd
+++ /dev/null
@@ -1,53 +0,0 @@
--------------------------------------------------------------------[27.10.2011]
--- Soundrive 1.05
--------------------------------------------------------------------------------
--- V0.1 	05.10.2011	������ ������
-
--- SOUNDRIVE 1.05 PORTS mode 1
--- #0F = left channel A (stereo covox channel 1)
--- #1F = left channel B
--- #4F = right channel C (stereo covox channel 2)
--- #5F = right channel D
-
--- #FB = right channel D
-
-library IEEE;
-use IEEE.STD_LOGIC_1164.ALL;
-use IEEE.NUMERIC_STD.ALL;
- 
-entity soundrive is
-	Port ( 
-		RESET	: in  std_logic;
-		CLK	: in  std_logic;
-		CS		: in  std_logic;
-		A		: in  std_logic_vector(7 downto 0);
-		DI		: in  std_logic_vector(7 downto 0);
-		WR_n	: in  std_logic;
-		IORQ_n: in  std_logic;
-		DOS	: in  std_logic;
-		OUTA	: out std_logic_vector(7 downto 0);
-		OUTB	: out std_logic_vector(7 downto 0);
-		OUTC	: out std_logic_vector(7 downto 0);
-		OUTD	: out std_logic_vector(7 downto 0));
-end soundrive;
-
-architecture soundrive_unit of soundrive is
-begin
-	process (CLK, RESET, CS)
-	begin
-		if RESET = '1' or CS = '0' then
-			outa <= (others => '0');
-			outb <= (others => '0');
-			outc <= (others => '0');
-			outd <= (others => '0');
-		elsif rising_edge(CLK) then
-			if    A = X"0F" and IORQ_n = '0' and WR_n = '0' and DOS = '0' then outa <= DI;
-			elsif A = X"1F" and IORQ_n = '0' and WR_n = '0' and DOS = '0' then outb <= DI;
-			elsif A = X"4F" and IORQ_n = '0' and WR_n = '0' and DOS = '0' then outc <= DI;
-			elsif A = X"5F" and IORQ_n = '0' and WR_n = '0' and DOS = '0' then outd <= DI;
-			elsif A = X"FB" and IORQ_n = '0' and WR_n = '0' and DOS = '0' then outd <= DI;
-			end if;
-		end if;
-	end process;
-	
-end soundrive_unit;
\ No newline at end of file