diff --git a/src/ecosboard.c b/src/ecosboard.c
index 019eb0e85..11b786cb8 100644
--- a/src/ecosboard.c
+++ b/src/ecosboard.c
@@ -190,7 +190,7 @@ int zy1000_configuration_output_handler_log(struct command_context_s *context,
 }
 
 #ifdef CYGPKG_PROFILE_GPROF
-extern void start_profile();
+extern void start_profile(void);
 
 int eCosBoard_handle_eCosBoard_profile_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 {
@@ -201,13 +201,13 @@ int eCosBoard_handle_eCosBoard_profile_command(struct command_context_s *cmd_ctx
 
 #endif
 
-externC void phi_init_all_network_interfaces();
+externC void phi_init_all_network_interfaces(void);
 
 command_context_t *cmd_ctx;
 
 static bool webRunning = false;
 
-void keep_webserver()
+void keep_webserver(void)
 {
 	// Target initialisation is only attempted at startup, so we sleep forever and
 	// let the http server bail us out(i.e. get config files set up).
@@ -261,12 +261,12 @@ MTAB_ENTRY( romfs_mte1,
 		(CYG_ADDRWORD) &filedata[0] );
 #endif
 
-void openocd_sleep_prelude()
+void openocd_sleep_prelude(void)
 {
 	cyg_mutex_unlock(&httpstate.jim_lock);
 }
 
-void openocd_sleep_postlude()
+void openocd_sleep_postlude(void)
 {
 	cyg_mutex_lock(&httpstate.jim_lock);
 }
@@ -422,7 +422,7 @@ static int zylinjtag_Jim_Command_reboot(Jim_Interp *interp, int argc,
 
 extern Jim_Interp *interp;
 
-static void zylinjtag_startNetwork()
+static void zylinjtag_startNetwork(void)
 {
 	// Bring TCP/IP up immediately before we're ready to accept commands.
 	//
@@ -857,7 +857,7 @@ bool logAllToSerial = false;
 int boolParam(char *var);
 
 
-command_context_t *setup_command_handler();
+command_context_t *setup_command_handler(void);
 
 extern const char *zylin_config_dir;
 
diff --git a/src/jtag/jtag.c b/src/jtag/jtag.c
index a0cdf014e..5ce998943 100644
--- a/src/jtag/jtag.c
+++ b/src/jtag/jtag.c
@@ -969,7 +969,7 @@ void jtag_add_tlr(void)
 		jtag_error=retval;
 }
 
-int MINIDRIVER(interface_jtag_add_tlr)()
+int MINIDRIVER(interface_jtag_add_tlr)(void)
 {
 	enum tap_state state = TAP_RESET;
 	jtag_command_t **last_cmd = jtag_get_last_command_p();
diff --git a/src/jtag/zy1000.c b/src/jtag/zy1000.c
index 0b3c8525a..2c5619132 100644
--- a/src/jtag/zy1000.c
+++ b/src/jtag/zy1000.c
@@ -83,7 +83,7 @@ static int zy1000_speed_div(int speed, int *khz)
 	return ERROR_OK;
 }
 
-static bool readPowerDropout()
+static bool readPowerDropout(void)
 {
 	cyg_uint32 state;
 	// sample and clear power dropout
@@ -95,7 +95,7 @@ static bool readPowerDropout()
 }
 
 
-static bool readSRST()
+static bool readSRST(void)
 {
 	cyg_uint32 state;
 	// sample and clear SRST sensing
@@ -152,7 +152,7 @@ int zy1000_read(void)
 	return -1;
 }
 
-extern bool readSRST();
+extern bool readSRST(void);
 
 void zy1000_reset(int trst, int srst)
 {
@@ -404,7 +404,7 @@ int interface_jtag_execute_queue(void)
 
 
 
-static cyg_uint32 getShiftValue()
+static cyg_uint32 getShiftValue(void)
 {
 	cyg_uint32 value;
 	waitIdle();
@@ -413,7 +413,7 @@ static cyg_uint32 getShiftValue()
 	return value;
 }
 #if 0
-static cyg_uint32 getShiftValueFlip()
+static cyg_uint32 getShiftValueFlip(void)
 {
 	cyg_uint32 value;
 	waitIdle();
@@ -438,7 +438,7 @@ static void shiftValueInnerFlip(const enum tap_state state, const enum tap_state
 
 extern int jtag_check_value(u8 *captured, void *priv);
 
-static void gotoEndState()
+static void gotoEndState(void)
 {
 	setCurrentState(cmd_queue_end_state);
 }
@@ -693,10 +693,10 @@ int interface_jtag_add_reset(int req_trst, int req_srst)
 	return ERROR_OK;
 }
 
-int interface_jtag_add_runtest(int num_cycles, enum tap_state state)
+static int zy1000_jtag_add_clocks(int num_cycles, enum tap_state state, enum tap_state clockstate)
 {
 	/* num_cycles can be 0 */
-	setCurrentState(TAP_IDLE);
+	setCurrentState(clockstate);
 
 	/* execute num_cycles, 32 at the time. */
 	int i;
@@ -708,7 +708,7 @@ int interface_jtag_add_runtest(int num_cycles, enum tap_state state)
 		{
 			num=num_cycles-i;
 		}
-		shiftValueInner(TAP_IDLE, TAP_IDLE, num, 0);
+		shiftValueInner(clockstate, clockstate, num, 0);
 	}
 
 #if !TEST_MANUAL()
@@ -734,6 +734,16 @@ int interface_jtag_add_runtest(int num_cycles, enum tap_state state)
 	return ERROR_OK;
 }
 
+int interface_jtag_add_runtest(int num_cycles, enum tap_state state)
+{
+	return zy1000_jtag_add_clocks(num_cycles, state, TAP_IDLE);
+}
+
+int interface_jtag_add_clocks(int num_cycles)
+{
+	return zy1000_jtag_add_clocks(num_cycles, cmd_queue_cur_state, cmd_queue_end_state);
+}
+
 int interface_jtag_add_sleep(u32 us)
 {
 	jtag_sleep(us);
@@ -843,3 +853,5 @@ int boolParam(char *var)
 	free(name);
 	return result;
 }
+
+