diff --git a/conv.c b/conv.c
new file mode 100644
index 0000000..caeccc2
--- /dev/null
+++ b/conv.c
@@ -0,0 +1,22 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+int main(int argc, char *argv[])
+{
+   int i, l;
+   unsigned char v[4] = { 0, 0, 0, 0 };
+
+   printf("-- Machine generated from ram.img.\n");
+   printf("library ieee;\n use ieee.std_logic_1164.all;\nuse ieee.numeric_std.all;\n\n");
+   printf("package bootrom is\n");
+   printf("  type rom_t is array (0 to 2047) of std_logic_vector(31 downto 0);\n  constant rom : rom_t := (\n");
+
+   l = read(0,v,4);
+   for (i=0 ; l; i++) {
+      printf ("    x\"%.2x%.2x%.2x%.2x\",\n", v[0], v[1], v[2], v[3]);
+      l = read(0,v,4);
+   }
+   printf("    others => x\"00000000\" );\n\n");
+   printf("end package;\n\npackage body bootrom is\nend package body;\n");
+}
diff --git a/cpu_lattice.vhd b/cpu_lattice.vhd
new file mode 100644
index 0000000..09cdfc7
--- /dev/null
+++ b/cpu_lattice.vhd
@@ -0,0 +1,150 @@
+library ieee;
+use ieee.std_logic_1164.all;
+use ieee.numeric_std.all;
+use std.textio.all;
+
+use work.cpu2j0_pack.all;
+use work.data_bus_pkg.all;
+entity cpu_lattice is port (
+   clk : in std_logic;
+   led : out std_logic_vector(7 downto 0));
+end;
+
+architecture behaviour of cpu_lattice is
+  type instrd_bus_i_t is array(instr_bus_device_t'left to instr_bus_device_t'right) of cpu_data_i_t;
+  type instrd_bus_o_t is array(instr_bus_device_t'left to instr_bus_device_t'right) of cpu_data_o_t;
+
+  signal instr_master_o : cpu_instruction_o_t;
+  signal instr_master_i : cpu_instruction_i_t := (( others => 'Z' ),'0');
+  signal instr_slaves_i : instr_bus_i_t;
+  signal instr_slaves_o : instr_bus_o_t;
+  signal instrd_slaves_i : instrd_bus_i_t;
+  signal instrd_slaves_o : instrd_bus_o_t;
+
+  signal data_master_o : cpu_data_o_t;
+  signal data_master_i : cpu_data_i_t := (( others => 'Z' ),'0');
+  signal data_slaves_i : data_bus_i_t;
+  signal data_slaves_o : data_bus_o_t;
+
+  signal sram_d_o : cpu_data_o_t;
+
+  signal debug_i : cpu_debug_i_t := CPU_DEBUG_NOP;
+  signal debug_i_cmd : std_logic_vector(1 downto 0) := "00";
+  signal debug_o : cpu_debug_o_t;
+
+  signal slp_o : std_logic;
+
+  signal event_i : cpu_event_i_t := NULL_CPU_EVENT_I;
+  signal event_o : cpu_event_o_t;
+
+--  signal clk : std_logic := '1';
+  signal rst : std_logic := '1';
+
+  signal dummy : bit;
+
+  signal pio_data_o : cpu_data_o_t := NULL_DATA_O;
+  signal pio_data_i : cpu_data_i_t := (ack => '0', d => (others => '0'));
+  signal data_select : data_bus_device_t;
+  signal db_we : std_logic_vector(3 downto 0);
+begin
+  rst <= '1', '0' after 10 ns;
+
+--  clk_gen : process
+--  begin
+--    clk <= '0';
+--    wait for 10 ns;
+--    clk <= '1';
+--    wait for 10 ns;
+--  end process;
+
+  process (data_master_o)
+    variable dev : data_bus_device_t;
+  begin
+    if data_master_o.en = '0' then
+      dev := DEV_NONE;
+    else
+      dev := decode_data_address(data_master_o.a);
+      -- Make SRAM the default. Would prefer not to do this, but not
+      -- sure how many things depend on defaulting to SRAM. For example,
+      -- my build of sdboot has a 4 byte stack at 0x300000 and loading
+      -- it in gdb prints errors.
+      if dev = DEV_NONE then
+        dev := DEV_SRAM;
+      end if;
+    end if;
+    data_select <= dev;
+  end process;
+
+  data_buses(master_i => data_master_i, master_o => data_master_o,
+             selected => data_select,
+             slaves_i => data_slaves_i, slaves_o => data_slaves_o);
+
+  data_slaves_i(DEV_NONE) <= loopback_bus(data_slaves_o(DEV_NONE));
+  data_slaves_i(DEV_SPI) <= loopback_bus(data_slaves_o(DEV_SPI));
+  data_slaves_i(DEV_UART0) <= loopback_bus(data_slaves_o(DEV_UART0));
+
+  data_slaves_i(DEV_DDR) <= loopback_bus(data_slaves_o(DEV_DDR));
+
+  pio_data_i.d <= (others => '0');
+  pio_data_i.ack <= pio_data_o.en;
+
+  instruction_buses(master_i => instr_master_i, master_o => instr_master_o,
+                    selected => decode_instr_address(instr_master_o.a),
+                    slaves_i => instr_slaves_i, slaves_o => instr_slaves_o);
+  pio_data_o <= data_slaves_o(DEV_PIO);
+  data_slaves_i(DEV_PIO) <= pio_data_i;
+
+
+  with debug_i_cmd select
+    debug_i.cmd <=
+    BRK when "00",
+    STEP when "01",
+    INSERT when "10",
+    CONTINUE when others;
+
+  splice_instr_data_bus(instr_slaves_o(DEV_DDR), instr_slaves_i(DEV_DDR),
+                        instrd_slaves_o(DEV_DDR), instrd_slaves_i(DEV_DDR));
+
+  cpu1: cpu
+            port map(clk => clk, rst => rst,
+                     db_o => data_master_o, db_i => data_master_i,
+                     inst_o => instr_master_o, inst_i => instr_master_i,
+                     debug_o => debug_o, debug_i => debug_i,
+                     event_i => event_i, event_o => event_o);
+
+  sram : entity work.cpu_sram
+    port map(clk => clk,
+             ibus_i => instr_slaves_o(DEV_SRAM),
+             ibus_o => instr_slaves_i(DEV_SRAM),
+             db_i => data_slaves_o(DEV_SRAM),
+             db_o => data_slaves_i(DEV_SRAM));
+
+  -- intercept and print PIO and UART writes
+  l0: process(clk)
+    variable uart_line : line;
+    variable l : line;
+    variable c : character;
+  begin
+    if clk'event and clk = '1' then
+      if pio_data_o.wr = '1' and pio_data_o.a = x"ABCD0000" then
+--        write(l, string'("LED: Write "));
+--        write(l, " at " & time'image(now));
+--        writeline(output, l);
+      led <= pio_data_o.d(7 downto 0);
+      end if;
+      if data_slaves_o(DEV_UART0).wr = '1' and data_slaves_o(DEV_UART0).a = x"ABCD0104" then
+--        c := character'val(to_integer(unsigned(data_slaves_o(DEV_UART0).d(7 downto 0))));
+--        if character'pos(c) = 10 then -- newline
+--          writeline(output, uart_line);
+--        else
+--          write(uart_line, c);
+--          if c = ';' then
+            -- hack to better display the gdb remote protocol messages
+--          writeline(output, uart_line);
+--          end if;
+--        end if;
+      end if;
+    end if;
+  end process;
+
+end;
diff --git a/lattice_ebr.vhd b/lattice_ebr.vhd
new file mode 100644
index 0000000..0e017c0
--- /dev/null
+++ b/lattice_ebr.vhd
@@ -0,0 +1,51 @@
+-- A simple pre-initalized RAM, which reads from a binary file at synthesis time
+-- single 32 bit read/write port.
+library ieee;
+use ieee.std_logic_1164.all;
+use ieee.numeric_std.all;
+use work.bootrom.all;
+
+entity simple_ram is
+  generic (
+    -- 32-bit read/write port.  ADDR_WIDTH is in bytes, not words.
+    ADDR_WIDTH : integer := 15 -- default 32k
+    );
+  port (
+    clk : in std_logic;
+
+    en : in std_logic;
+    raddr : in std_logic_vector(ADDR_WIDTH - 3 downto 0);
+    do : out std_logic_vector(31 downto 0);
+
+    we : in std_logic_vector(3 downto 0);
+    waddr : in std_logic_vector(ADDR_WIDTH - 3 downto 0);
+    di : in std_logic_vector(31 downto 0)
+    );
+end simple_ram;
+
+architecture behavioral of simple_ram is
+  constant NUM_WORDS : integer :=  2**(ADDR_WIDTH - 2);
+  signal ram : rom_t := work.bootrom.rom;
+begin
+
+  process (clk)
+    variable read : std_logic_vector(31 downto 0);
+  begin
+    if clk'event and clk = '1' and en = '1' then
+      if we(3) = '1' then
+        ram(to_integer(unsigned(waddr)))(31 downto 24) <= di(31 downto 24);
+      end if;
+      if we(2) = '1' then
+        ram(to_integer(unsigned(waddr)))(23 downto 16) <= di(23 downto 16);
+      end if;
+      if we(1) = '1' then
+        ram(to_integer(unsigned(waddr)))(15 downto 8 ) <= di(15 downto 8 );
+      end if;
+      if we(0) = '1' then
+        ram(to_integer(unsigned(waddr)))(7  downto 0 ) <= di(7  downto 0 );
+      end if;
+      read := ram(to_integer(unsigned(raddr)));
+      do <= read;
+    end if;
+  end process;
+end behavioral;
diff --git a/lattice_tb.vhd b/lattice_tb.vhd
new file mode 100644
index 0000000..385d9b5
--- /dev/null
+++ b/lattice_tb.vhd
@@ -0,0 +1,51 @@
+library ieee;
+use ieee.std_logic_1164.all;
+use ieee.numeric_std.all;
+use std.textio.all;
+
+entity lattice_tb is
+end lattice_tb;
+
+architecture beh of lattice_tb is
+
+  function to_hex_string(s: in std_logic_vector) return string is
+  constant hex : string (1 to 16) := "0123456789ABCDEF";
+  variable ss  : std_logic_vector(31 downto 0) := (others => '0');
+  variable ret : string (1 to ss'left/4+1);
+  begin
+    ss(s'range) := s;
+    for i in 0 to ss'left/4 loop
+      ret(i+1) := hex(to_integer(unsigned(ss(ss'left - i*4 downto ss'left - i*4 -3)))+1);
+    end loop;
+   return ret;
+  end to_hex_string;
+
+  signal clk : std_logic;
+  signal led : std_logic_vector(7 downto 0) := x"00";
+  signal ol  : std_logic_vector(7 downto 0) := x"00";
+begin
+
+   c0: process
+   begin 
+      clk <= '0';
+      wait for 10 ns;
+      clk <= '1';
+      wait for 10 ns;
+   end process;
+
+   fp: entity work.cpu_lattice
+      port map(clk => clk, led => led);
+
+   p0: process(led)
+   variable l : line;
+   begin
+      if led /= ol then
+         ol <= led;
+         write(l, string'("LED: Write "));
+         write(l, to_hex_string(led));
+         write(l, " at " & time'image(now));
+         writeline(output, l);
+      end if;
+   end process;
+
+end beh;
diff --git a/nvc_lattice.sh b/nvc_lattice.sh
new file mode 100644
index 0000000..1c1b91e
--- /dev/null
+++ b/nvc_lattice.sh
@@ -0,0 +1,9 @@
+#!/bin/sh
+
+nvc -a cpu2j0_pkg.vhd components_pkg.vhd mult_pkg.vhd decode_pkg.vhd decode_body.vhd datapath_pkg.vhd cpu.vhd decode.vhd decode_core.vhd decode_table.vhd decode_table_reverse.vhd datapath.vhd register_file.vhd mult.vhd 
+
+nvc -a  data_bus_pkg.vhd monitor_pkg.vhd ram_init.vhd lattice_ebr.vhd bus_monitor.vhd timeout_cnt.vhd cpu_simple_sram.vhd cpu_lattice.vhd
+
+nvc -a lattice_tb.vhd
+
+nvc -e -V lattice_tb
diff --git a/ram.img b/ram.img
index 32ade89..cd9d707 100755
Binary files a/ram.img and b/ram.img differ
diff --git a/ram.sh b/ram.sh
index 36dc761..bb4e69e 100644
--- a/ram.sh
+++ b/ram.sh
@@ -4,3 +4,8 @@ rm ram.img
 make -C testrom
 sh2-elf-size testrom/main.elf ram.img
 sh2-elf-objcopy -v -S -O binary --srec-forceS3 testrom/main.elf ram.img
+
+echo making image for Lattice
+
+gcc conv.c -o conv
+./conv < ram.img > ram_init.vhd
diff --git a/ram_init.vhd b/ram_init.vhd
new file mode 100644
index 0000000..1a11391
--- /dev/null
+++ b/ram_init.vhd
@@ -0,0 +1,1184 @@
+-- Machine generated from ram.img.
+library ieee;
+ use ieee.std_logic_1164.all;
+use ieee.numeric_std.all;
+
+package bootrom is
+  type rom_t is array (0 to 2047) of std_logic_vector(31 downto 0);
+  constant rom : rom_t := (
+    x"0000010c",
+    x"000022f8",
+    x"0000010c",
+    x"000022f8",
+    x"00000d1a",
+    x"00000cfa",
+    x"00000d1a",
+    x"00000cfa",
+    x"00000cfa",
+    x"00000d2a",
+    x"00000d2a",
+    x"00000d0a",
+    x"00000cfa",
+    x"00000cfa",
+    x"00000cfa",
+    x"00000cfa",
+    x"00000cfa",
+    x"00000cfa",
+    x"00000cfa",
+    x"00000cfa",
+    x"00000cfa",
+    x"00000cfa",
+    x"00000cfa",
+    x"00000cfa",
+    x"00000cfa",
+    x"00000cfa",
+    x"00000cfa",
+    x"00000cfa",
+    x"00000cfa",
+    x"00000cfa",
+    x"00000cfa",
+    x"00000cfa",
+    x"00000cbc",
+    x"00000cd2",
+    x"00000cee",
+    x"00000cfa",
+    x"00000cfa",
+    x"00000cfa",
+    x"00000cfa",
+    x"00000cfa",
+    x"00000cfa",
+    x"00000cfa",
+    x"00000cfa",
+    x"00000cfa",
+    x"00000cfa",
+    x"00000cfa",
+    x"00000cfa",
+    x"00000cfa",
+    x"00000cfa",
+    x"00000cfa",
+    x"00000cfa",
+    x"00000cfa",
+    x"00000cfa",
+    x"00000cfa",
+    x"00000cfa",
+    x"00000cfa",
+    x"00000cfa",
+    x"00000cfa",
+    x"00000cfa",
+    x"00000cfa",
+    x"00000cfa",
+    x"00000cfa",
+    x"00000cfa",
+    x"00000cfa",
+    x"d019d116",
+    x"2102000b",
+    x"00090009",
+    x"0009d014",
+    x"d1122102",
+    x"d010400b",
+    x"0009d110",
+    x"d0112102",
+    x"0009e000",
+    x"e101e202",
+    x"e303e404",
+    x"e505e606",
+    x"e707e808",
+    x"e909ea0a",
+    x"eb0bec0c",
+    x"ed0dee00",
+    x"4e2e4e1e",
+    x"4e0ed002",
+    x"400b0009",
+    x"c3200009",
+    x"0000019c",
+    x"00000528",
+    x"00000100",
+    x"abcd0000",
+    x"000000ff",
+    x"0000004f",
+    x"00000011",
+    x"d1042f86",
+    x"684c4f22",
+    x"410b6483",
+    x"60834f26",
+    x"000b68f6",
+    x"000010e4",
+    x"d0034f22",
+    x"400b0009",
+    x"4f26000b",
+    x"00090009",
+    x"000010fc",
+    x"000b0009",
+    x"d101412b",
+    x"00090009",
+    x"00001068",
+    x"614c6213",
+    x"729f622c",
+    x"e3053236",
+    x"8d036213",
+    x"6043a00f",
+    x"70a972d0",
+    x"622ce709",
+    x"32768902",
+    x"6043a007",
+    x"70d071bf",
+    x"611c3136",
+    x"8d02e000",
+    x"604370c9",
+    x"000b0009",
+    x"2f86e100",
+    x"2f966843",
+    x"2fa66953",
+    x"2fb66a63",
+    x"db0b4f22",
+    x"25126083",
+    x"640034a0",
+    x"8d087801",
+    x"4b0b0009",
+    x"61924108",
+    x"4108310c",
+    x"aff32912",
+    x"60834f26",
+    x"6bf66af6",
+    x"69f6000b",
+    x"68f60009",
+    x"000001a8",
+    x"2f86e000",
+    x"2f96e903",
+    x"2fa62fb6",
+    x"2fc6ecfc",
+    x"2fd62fe6",
+    x"d7257ff8",
+    x"6af36bf3",
+    x"2f027af8",
+    x"7be84615",
+    x"8f373697",
+    x"8f096063",
+    x"6043c803",
+    x"8f09c801",
+    x"614676fc",
+    x"e204a010",
+    x"1f118801",
+    x"8d086043",
+    x"c8018f05",
+    x"e2026145",
+    x"76fe6013",
+    x"a00581be",
+    x"614476ff",
+    x"601380ac",
+    x"e201322c",
+    x"6353352c",
+    x"61533138",
+    x"71fe68f3",
+    x"41017804",
+    x"71016d84",
+    x"e00f6ed3",
+    x"4ecc20e9",
+    x"0e7c60d3",
+    x"23e0c90f",
+    x"007c4110",
+    x"80318ff2",
+    x"730260f2",
+    x"302cafc6",
+    x"2f0260f2",
+    x"7f086ef6",
+    x"6df66cf6",
+    x"6bf66af6",
+    x"69f6000b",
+    x"68f60009",
+    x"0000119c",
+    x"2f86e800",
+    x"2f966953",
+    x"2fa66a53",
+    x"2fb63a4c",
+    x"db094f22",
+    x"39a08d07",
+    x"61936294",
+    x"382c688c",
+    x"4b0b6410",
+    x"aff739a0",
+    x"60834f26",
+    x"6bf66af6",
+    x"69f6000b",
+    x"68f60009",
+    x"0000016c",
+    x"2f862f96",
+    x"2fa66a43",
+    x"2fb62fc6",
+    x"2fd62fe6",
+    x"6e534f22",
+    x"db167ffc",
+    x"dc162f62",
+    x"4b0be424",
+    x"2aa8d913",
+    x"8d0365e3",
+    x"4b0b64a3",
+    x"65e34c0b",
+    x"64f26803",
+    x"38ac688c",
+    x"490be423",
+    x"dd0e6083",
+    x"40094009",
+    x"490b04dc",
+    x"6083c90f",
+    x"490b04dc",
+    x"d00a400b",
+    x"0009882b",
+    x"8be07f04",
+    x"4f266ef6",
+    x"6df66cf6",
+    x"6bf66af6",
+    x"69f6000b",
+    x"68f60009",
+    x"0000016c",
+    x"000002d4",
+    x"0000119c",
+    x"00000184",
+    x"2f862f96",
+    x"2fa62fb6",
+    x"6b632fc6",
+    x"6c532fd6",
+    x"6d632fe6",
+    x"6e434f22",
+    x"7fe861f3",
+    x"71081f12",
+    x"61f371f8",
+    x"d9341f53",
+    x"1f114d15",
+    x"8f5665b3",
+    x"e0033d07",
+    x"8f1e60d3",
+    x"60c3c803",
+    x"8f1ec801",
+    x"66f36ae3",
+    x"76147e08",
+    x"3ea08d0f",
+    x"57f564a0",
+    x"490b2f62",
+    x"680384a1",
+    x"4808490b",
+    x"640366f2",
+    x"4808380c",
+    x"26807a02",
+    x"afee7601",
+    x"7dfc2c72",
+    x"afdb7c04",
+    x"88018d1d",
+    x"60c3c801",
+    x"8f1a66f3",
+    x"6ae37614",
+    x"7e043ea0",
+    x"8d0f51f1",
+    x"64a0490b",
+    x"2f626803",
+    x"84a14808",
+    x"490b6403",
+    x"66f24808",
+    x"380c2680",
+    x"7a02afee",
+    x"76017dfe",
+    x"851e2c01",
+    x"afbb7c02",
+    x"490b64e0",
+    x"680362e3",
+    x"84e17202",
+    x"1f246403",
+    x"490b4808",
+    x"480851f2",
+    x"380c608e",
+    x"2c007dff",
+    x"801c7c01",
+    x"afa75ef4",
+    x"d207420b",
+    x"54f360c3",
+    x"7f184f26",
+    x"6ef66df6",
+    x"6cf66bf6",
+    x"6af669f6",
+    x"000b68f6",
+    x"000001a8",
+    x"00001024",
+    x"2f862f96",
+    x"2fa66a53",
+    x"2fb62fc6",
+    x"6c432fd6",
+    x"e4242fe6",
+    x"3cacd91c",
+    x"4f22db1c",
+    x"490b7ff8",
+    x"d51b4b0b",
+    x"e401d11b",
+    x"6ef3680c",
+    x"7e043ac0",
+    x"dd188d13",
+    x"65e367a4",
+    x"62734209",
+    x"42096023",
+    x"c90f021c",
+    x"6073c90f",
+    x"001ce402",
+    x"2e2080e1",
+    x"4b0b2f12",
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+    x"8d096a83",
+    x"880a8b01",
+    x"490be40d",
+    x"7801490b",
+    x"64a0aff4",
+    x"60804f26",
+    x"6af669f6",
+    x"000b68f6",
+    x"000010e4",
+    x"d1012142",
+    x"000b0009",
+    x"abcd0000",
+    x"2f86e440",
+    x"2f962fa6",
+    x"ea00d817",
+    x"4f22480b",
+    x"7ffcd016",
+    x"d916400b",
+    x"0009480b",
+    x"e442d415",
+    x"490b0009",
+    x"d414490b",
+    x"0009e450",
+    x"480be900",
+    x"2fa2e209",
+    x"61f23127",
+    x"890461f2",
+    x"71012f12",
+    x"aff80009",
+    x"480be455",
+    x"2f92e209",
+    x"61f23127",
+    x"890461f2",
+    x"71012f12",
+    x"aff80009",
+    x"9403480b",
+    x"0009afe5",
+    x"000900aa",
+    x"0000105c",
+    x"00001144",
+    x"00001028",
+    x"000011d8",
+    x"000011fc",
+    x"d104644c",
+    x"5012c808",
+    x"8bfcd102",
+    x"1141000b",
+    x"00090009",
+    x"abcd0100",
+    x"d1035012",
+    x"c80189fc",
+    x"d1016012",
+    x"000b600c",
+    x"abcd0100",
+    x"d0062f86",
+    x"4f22400b",
+    x"0009d105",
+    x"6803410b",
+    x"64036083",
+    x"4f26000b",
+    x"68f60009",
+    x"000010fc",
+    x"000010e4",
+    x"d102e202",
+    x"1123000b",
+    x"00090009",
+    x"abcd0100",
+    x"000b0009",
+    x"4f000000",
+    x"4f666673",
+    x"65747300",
+    x"4f4b0000",
+    x"54657874",
+    x"3d303b44",
+    x"6174613d",
+    x"303b4273",
+    x"733d3000",
+    x"2f000000",
+    x"2c000000",
+    x"466f7065",
+    x"6e2c0000",
+    x"46636c6f",
+    x"73652c00",
+    x"46726561",
+    x"642c0000",
+    x"46777269",
+    x"74652c00",
+    x"466c7365",
+    x"656b2c00",
+    x"30313233",
+    x"34353637",
+    x"38396162",
+    x"63646566",
+    x"00000000",
+    x"00000006",
+    x"00000007",
+    x"00000006",
+    x"00000007",
+    x"00000007",
+    x"00001174",
+    x"0000117c",
+    x"00001184",
+    x"0000118c",
+    x"00001194",
+    x"47444220",
+    x"53747562",
+    x"20666f72",
+    x"2048532d",
+    x"324a3020",
+    x"53483220",
+    x"524f4d0a",
+    x"00000000",
+    x"00000032",
+    x"72657669",
+    x"73696f6e",
+    x"3a206368",
+    x"616e6765",
+    x"7365743a",
+    x"20202035",
+    x"3a353464",
+    x"33376335",
+    x"61373762",
+    x"300a6275",
+    x"696c643a",
+    x"204d6f6e",
+    x"204d6172",
+    x"20203420",
+    x"30313a31",
+    x"303a3438",
+    x"20455354",
+    x"20323031",
+    x"390a0000",
+    others => x"00000000" );
+
+end package;
+
+package body bootrom is
+end package body;
diff --git a/testrom/main.c b/testrom/main.c
index c6bc244..d3c4905 100644
--- a/testrom/main.c
+++ b/testrom/main.c
@@ -82,6 +82,7 @@ led(int v)
 void
 main_sh (void)
 {
+  volatile int i;
   led(0x40);
 
   uart_set_baudrate ();
@@ -101,4 +102,11 @@ main_sh (void)
   putstr ("GDB Stub for HS-2J0 SH2 ROM\n");
   putstr (version_string);
   led(0x50);
+
+  for (;;) {
+    for (i=0; i<10; i++) {}
+    led(0x55);
+    for (i=0; i<10; i++) {}
+    led(0xaa);
+  } 
 }