diff --git a/Source/HBIOS/ch376-native/Makefile b/Source/HBIOS/ch376-native/Makefile
index cd6f25b0..a0989a7e 100644
--- a/Source/HBIOS/ch376-native/Makefile
+++ b/Source/HBIOS/ch376-native/Makefile
@@ -46,6 +46,7 @@ clean:
 	rm base-drv.s
 	rm keyboard.s
 
+.PRECIOUS: $(ASSDIR)%.c.asm
 $(ASSDIR)%.c.s: $(ASSDIR)%.c.asm
 	@mkdir -p $(dir $@)
 	echo "Converting $< to $@"
diff --git a/Source/HBIOS/ch376-native/base-drv/usb-init.c.s b/Source/HBIOS/ch376-native/base-drv/usb-init.c.s
index 90f05110..ba928203 100644
--- a/Source/HBIOS/ch376-native/base-drv/usb-init.c.s
+++ b/Source/HBIOS/ch376-native/base-drv/usb-init.c.s
@@ -167,7 +167,7 @@ l__chnative_init_00110:
 	ld	hl,usb_init_str_4
 	call	_print_string
 ;source-doc/base-drv/usb-init.c:55: return;
-	jr	l__chnative_init_00118
+	jp	l__chnative_init_00127
 l__chnative_init_00108:
 ;source-doc/base-drv/usb-init.c:58: print_string("\r\nCH376: PRESENT (VER $");
 	ld	hl,usb_init_str_5
@@ -185,19 +185,19 @@ l__chnative_init_00111:
 	call	_print_string
 ;source-doc/base-drv/usb-init.c:66: usb_host_bus_reset();
 	call	_usb_host_bus_reset
-;source-doc/base-drv/usb-init.c:68: for (uint8_t i = 0; i < (forced ? 10 : 5); i++) {
+;source-doc/base-drv/usb-init.c:68: for (uint8_t i = 0; i < (forced ? 80 : 5); i++) {
 	ld	c,0x00
-l__chnative_init_00116:
+l__chnative_init_00125:
 	bit	0,(ix+4)
-	jr	Z,l__chnative_init_00120
-	ld	b,0x0a
-	jr	l__chnative_init_00121
-l__chnative_init_00120:
+	jr	Z,l__chnative_init_00129
+	ld	b,0x50
+	jr	l__chnative_init_00130
+l__chnative_init_00129:
 	ld	b,0x05
-l__chnative_init_00121:
+l__chnative_init_00130:
 	ld	a, c
 	sub	b
-	jr	NC,l__chnative_init_00114
+	jr	NC,l__chnative_init_00121
 ;source-doc/base-drv/usb-init.c:69: const uint8_t r = ch_very_short_wait_int_and_get_();
 	push	bc
 	call	_ch_very_short_wait_int_and_get
@@ -205,32 +205,72 @@ l__chnative_init_00121:
 	pop	bc
 ;source-doc/base-drv/usb-init.c:71: if (r == USB_INT_CONNECT) {
 	sub	0x81
-	jr	NZ,l__chnative_init_00117
+	jr	NZ,l__chnative_init_00126
 ;source-doc/base-drv/usb-init.c:72: print_string("USB: CONNECTED$");
 	ld	hl,usb_init_str_7
 	call	_print_string
 ;source-doc/base-drv/usb-init.c:74: enumerate_all_devices();
 	call	_enumerate_all_devices
-;source-doc/base-drv/usb-init.c:76: USB_MODULE_LEDS = 0x03;
+;source-doc/base-drv/usb-init.c:76: if (forced && count_of_devices() == 0) {
+	bit	0,(ix+4)
+	jr	Z,l__chnative_init_00118
+	call	_count_of_devices
+	or	a
+	jr	NZ,l__chnative_init_00118
+;source-doc/base-drv/usb-init.c:77: print_string("\r\nUSB: SCANNING $");
+	ld	hl,usb_init_str_8
+	call	_print_string
+;source-doc/base-drv/usb-init.c:79: for (i = 0; i < 10; i++) {
+	ld	(ix-1),0x00
+l__chnative_init_00122:
+;source-doc/base-drv/usb-init.c:80: print_string(".$");
+	ld	hl,usb_init_str_9
+	call	_print_string
+;source-doc/base-drv/usb-init.c:81: memset(get_usb_work_area(), 0, sizeof(_usb_state));
+	ld	hl,_x
+	ld	(hl),0x00
+	ld	e, l
+	ld	d, h
+	inc	de
+	ld	bc,0x0068
+	ldir
+;source-doc/base-drv/usb-init.c:82: usb_host_bus_reset();
+	call	_usb_host_bus_reset
+;source-doc/base-drv/usb-init.c:84: delay_medium();
+	call	_delay_medium
+;source-doc/base-drv/usb-init.c:85: enumerate_all_devices();
+	call	_enumerate_all_devices
+;source-doc/base-drv/usb-init.c:87: if (count_of_devices() > 0)
+	call	_count_of_devices
+	or	a
+	jr	NZ,l__chnative_init_00118
+;source-doc/base-drv/usb-init.c:79: for (i = 0; i < 10; i++) {
+	inc	(ix-1)
+	ld	a,(ix-1)
+	sub	0x0a
+	jr	C,l__chnative_init_00122
+;source-doc/base-drv/usb-init.c:92: connected:
+l__chnative_init_00118:
+;source-doc/base-drv/usb-init.c:93: USB_MODULE_LEDS = 0x03;
 	ld	a,0x03
 	ld	bc,_USB_MODULE_LEDS
 	out	(c), a
-;source-doc/base-drv/usb-init.c:77: return;
-	jr	l__chnative_init_00118
-l__chnative_init_00117:
-;source-doc/base-drv/usb-init.c:68: for (uint8_t i = 0; i < (forced ? 10 : 5); i++) {
+;source-doc/base-drv/usb-init.c:94: return;
+	jr	l__chnative_init_00127
+l__chnative_init_00126:
+;source-doc/base-drv/usb-init.c:68: for (uint8_t i = 0; i < (forced ? 80 : 5); i++) {
 	inc	c
-	jr	l__chnative_init_00116
-l__chnative_init_00114:
-;source-doc/base-drv/usb-init.c:81: USB_MODULE_LEDS = 0x00;
+	jr	l__chnative_init_00125
+l__chnative_init_00121:
+;source-doc/base-drv/usb-init.c:98: USB_MODULE_LEDS = 0x00;
 	ld	a,0x00
 	ld	bc,_USB_MODULE_LEDS
 	out	(c), a
-;source-doc/base-drv/usb-init.c:82: print_string("USB: DISCONNECTED$");
-	ld	hl,usb_init_str_8
+;source-doc/base-drv/usb-init.c:99: print_string("USB: DISCONNECTED$");
+	ld	hl,usb_init_str_10
 	call	_print_string
-l__chnative_init_00118:
-;source-doc/base-drv/usb-init.c:83: }
+l__chnative_init_00127:
+;source-doc/base-drv/usb-init.c:100: }
 	inc	sp
 	pop	ix
 	ret
@@ -268,9 +308,17 @@ usb_init_str_7:
 	DEFM "USB: CONNECTED$"
 	DEFB 0x00
 usb_init_str_8:
+	DEFB 0x0d
+	DEFB 0x0a
+	DEFM "USB: SCANNING $"
+	DEFB 0x00
+usb_init_str_9:
+	DEFM ".$"
+	DEFB 0x00
+usb_init_str_10:
 	DEFM "USB: DISCONNECTED$"
 	DEFB 0x00
-;source-doc/base-drv/usb-init.c:85: void chnative_init_force(void) { _chnative_init(true); }
+;source-doc/base-drv/usb-init.c:102: void chnative_init_force(void) { _chnative_init(true); }
 ; ---------------------------------
 ; Function chnative_init_force
 ; ---------------------------------
@@ -281,7 +329,7 @@ _chnative_init_force:
 	call	__chnative_init
 	inc	sp
 	ret
-;source-doc/base-drv/usb-init.c:87: void chnative_init(void) { _chnative_init(false); }
+;source-doc/base-drv/usb-init.c:104: void chnative_init(void) { _chnative_init(false); }
 ; ---------------------------------
 ; Function chnative_init
 ; ---------------------------------
diff --git a/Source/HBIOS/ch376-native/base-drv/usb_state.c.s b/Source/HBIOS/ch376-native/base-drv/usb_state.c.s
index e494fb01..660e8572 100644
--- a/Source/HBIOS/ch376-native/base-drv/usb_state.c.s
+++ b/Source/HBIOS/ch376-native/base-drv/usb_state.c.s
@@ -48,45 +48,44 @@ _USB_MODULE_LEDS	.EQU	0xff8a
 ;--------------------------------------------------------
 ; code
 ;--------------------------------------------------------
-;source-doc/base-drv/usb_state.c:13: device_config *find_device_config(const usb_device_type requested_type) {
+;source-doc/base-drv/usb_state.c:13: uint8_t count_of_devices(void) __sdcccall(1) {
 ; ---------------------------------
-; Function find_device_config
+; Function count_of_devices
 ; ---------------------------------
-_find_device_config:
-	push	ix
-	ld	ix,0
-	add	ix,sp
+_count_of_devices:
 ;source-doc/base-drv/usb_state.c:14: _usb_state *const p = get_usb_work_area();
-;source-doc/base-drv/usb_state.c:16: const device_config *p_config = first_device_config(p);
+;source-doc/base-drv/usb_state.c:18: const device_config *p_config = first_device_config(p);
 	ld	hl,_x
 	call	_first_device_config
-;source-doc/base-drv/usb_state.c:17: while (p_config) {
-l_find_device_config_00103:
+;source-doc/base-drv/usb_state.c:19: while (p_config) {
+	ld	c,0x00
+l_count_of_devices_00104:
 	ld	a, d
 	or	e
-	jr	Z,l_find_device_config_00105
-;source-doc/base-drv/usb_state.c:18: const uint8_t type = p_config->type;
+	jr	Z,l_count_of_devices_00106
+;source-doc/base-drv/usb_state.c:20: const uint8_t type = p_config->type;
 	ld	l, e
 	ld	h, d
 	ld	a, (hl)
 	and	0x0f
-;source-doc/base-drv/usb_state.c:20: if (type == requested_type)
-	sub	(ix+4)
-	jr	NZ,l_find_device_config_00102
-;source-doc/base-drv/usb_state.c:21: return (device_config *)p_config;
-	ex	de, hl
-	jr	l_find_device_config_00106
-l_find_device_config_00102:
-;source-doc/base-drv/usb_state.c:23: p_config = next_device_config(p, p_config);
+;source-doc/base-drv/usb_state.c:22: if (type != USB_IS_HUB && type)
+	cp	0x0f
+	jr	Z,l_count_of_devices_00102
+	or	a
+	jr	Z,l_count_of_devices_00102
+;source-doc/base-drv/usb_state.c:23: count++;
+	inc	c
+l_count_of_devices_00102:
+;source-doc/base-drv/usb_state.c:26: p_config = next_device_config(p, p_config);
+	push	bc
 	ld	hl,_x
 	call	_next_device_config
-	jr	l_find_device_config_00103
-l_find_device_config_00105:
-;source-doc/base-drv/usb_state.c:26: return NULL;
-	ld	hl,0x0000
-l_find_device_config_00106:
-;source-doc/base-drv/usb_state.c:27: }
-	pop	ix
+	pop	bc
+	jr	l_count_of_devices_00104
+l_count_of_devices_00106:
+;source-doc/base-drv/usb_state.c:29: return count;
+	ld	a, c
+;source-doc/base-drv/usb_state.c:30: }
 	ret
 _device_config_sizes:
 	DEFB +0x00
@@ -96,41 +95,41 @@ _device_config_sizes:
 	DEFB +0x06
 	DEFB 0x00
 	DEFB 0x00
-;source-doc/base-drv/usb_state.c:30: device_config *find_first_free(void) {
+;source-doc/base-drv/usb_state.c:33: device_config *find_first_free(void) {
 ; ---------------------------------
 ; Function find_first_free
 ; ---------------------------------
 _find_first_free:
-;source-doc/base-drv/usb_state.c:31: _usb_state *const boot_state = get_usb_work_area();
-;source-doc/base-drv/usb_state.c:34: device_config *p = first_device_config(boot_state);
+;source-doc/base-drv/usb_state.c:34: _usb_state *const boot_state = get_usb_work_area();
+;source-doc/base-drv/usb_state.c:37: device_config *p = first_device_config(boot_state);
 	ld	hl,_x
 	call	_first_device_config
-;source-doc/base-drv/usb_state.c:35: while (p) {
+;source-doc/base-drv/usb_state.c:38: while (p) {
 l_find_first_free_00103:
 	ld	a, d
 	or	e
 	jr	Z,l_find_first_free_00105
-;source-doc/base-drv/usb_state.c:36: if (p->type == 0)
+;source-doc/base-drv/usb_state.c:39: if (p->type == 0)
 	ld	l, e
 	ld	h, d
 	ld	a, (hl)
 	and	0x0f
 	jr	NZ,l_find_first_free_00102
-;source-doc/base-drv/usb_state.c:37: return p;
+;source-doc/base-drv/usb_state.c:40: return p;
 	ex	de, hl
 	jr	l_find_first_free_00106
 l_find_first_free_00102:
-;source-doc/base-drv/usb_state.c:39: p = next_device_config(boot_state, p);
+;source-doc/base-drv/usb_state.c:42: p = next_device_config(boot_state, p);
 	ld	hl,_x
 	call	_next_device_config
 	jr	l_find_first_free_00103
 l_find_first_free_00105:
-;source-doc/base-drv/usb_state.c:42: return NULL;
+;source-doc/base-drv/usb_state.c:45: return NULL;
 	ld	hl,0x0000
 l_find_first_free_00106:
-;source-doc/base-drv/usb_state.c:43: }
+;source-doc/base-drv/usb_state.c:46: }
 	ret
-;source-doc/base-drv/usb_state.c:45: device_config *first_device_config(const _usb_state *const p) __sdcccall(1) { return (device_config *)&p->device_configs[0]; }
+;source-doc/base-drv/usb_state.c:48: device_config *first_device_config(const _usb_state *const p) __sdcccall(1) { return (device_config *)&p->device_configs[0]; }
 ; ---------------------------------
 ; Function first_device_config
 ; ---------------------------------
@@ -139,24 +138,24 @@ _first_device_config:
 	inc	de
 	inc	de
 	ret
-;source-doc/base-drv/usb_state.c:47: device_config *next_device_config(const _usb_state *const usb_state, const device_config *const p) __sdcccall(1) {
+;source-doc/base-drv/usb_state.c:50: device_config *next_device_config(const _usb_state *const usb_state, const device_config *const p) __sdcccall(1) {
 ; ---------------------------------
 ; Function next_device_config
 ; ---------------------------------
 _next_device_config:
 	ld	c, l
 	ld	b, h
-;source-doc/base-drv/usb_state.c:48: if (p->type == 0)
+;source-doc/base-drv/usb_state.c:51: if (p->type == 0)
 	ld	l, e
 	ld	h, d
 	ld	a, (hl)
 	and	0x0f
 	jr	NZ,l_next_device_config_00102
-;source-doc/base-drv/usb_state.c:49: return NULL;
+;source-doc/base-drv/usb_state.c:52: return NULL;
 	ld	de,0x0000
 	jr	l_next_device_config_00105
 l_next_device_config_00102:
-;source-doc/base-drv/usb_state.c:51: const uint8_t size = device_config_sizes[p->type];
+;source-doc/base-drv/usb_state.c:54: const uint8_t size = device_config_sizes[p->type];
 	ld	l, e
 	ld	h, d
 	ld	a, (hl)
@@ -167,14 +166,14 @@ l_next_device_config_00102:
 	adc	a, +((_device_config_sizes) / 256)
 	ld	h, a
 	ld	a, (hl)
-;source-doc/base-drv/usb_state.c:58: const uint8_t       *_p     = (uint8_t *)p;
-;source-doc/base-drv/usb_state.c:59: device_config *const result = (device_config *)(_p + size);
+;source-doc/base-drv/usb_state.c:61: const uint8_t       *_p     = (uint8_t *)p;
+;source-doc/base-drv/usb_state.c:62: device_config *const result = (device_config *)(_p + size);
 	add	a, e
 	ld	e, a
 	ld	a,0x00
 	adc	a, d
 	ld	d, a
-;source-doc/base-drv/usb_state.c:61: if (result >= (device_config *)&usb_state->device_configs_end)
+;source-doc/base-drv/usb_state.c:64: if (result >= (device_config *)&usb_state->device_configs_end)
 	ld	hl,0x0068
 	add	hl, bc
 	ld	a, e
@@ -182,20 +181,20 @@ l_next_device_config_00102:
 	ld	a, d
 	sbc	a, h
 	ret	C
-;source-doc/base-drv/usb_state.c:62: return NULL;
+;source-doc/base-drv/usb_state.c:65: return NULL;
 	ld	de,0x0000
-;source-doc/base-drv/usb_state.c:64: return result;
+;source-doc/base-drv/usb_state.c:67: return result;
 l_next_device_config_00105:
-;source-doc/base-drv/usb_state.c:65: }
+;source-doc/base-drv/usb_state.c:68: }
 	ret
-;source-doc/base-drv/usb_state.c:68: device_config *get_usb_device_config(const uint8_t device_index) __sdcccall(1) {
+;source-doc/base-drv/usb_state.c:71: device_config *get_usb_device_config(const uint8_t device_index) __sdcccall(1) {
 ; ---------------------------------
 ; Function get_usb_device_config
 ; ---------------------------------
 _get_usb_device_config:
 	ld	c, a
-;source-doc/base-drv/usb_state.c:69: const _usb_state *const usb_state = get_usb_work_area();
-;source-doc/base-drv/usb_state.c:73: for (device_config *p = first_device_config(usb_state); p; p = next_device_config(usb_state, p)) {
+;source-doc/base-drv/usb_state.c:72: const _usb_state *const usb_state = get_usb_work_area();
+;source-doc/base-drv/usb_state.c:76: for (device_config *p = first_device_config(usb_state); p; p = next_device_config(usb_state, p)) {
 	push	bc
 	ld	hl,_x
 	call	_first_device_config
@@ -205,29 +204,29 @@ l_get_usb_device_config_00107:
 	ld	a, d
 	or	e
 	jr	Z,l_get_usb_device_config_00105
-;source-doc/base-drv/usb_state.c:74: if (p->type != USB_NOT_SUPPORTED) {
+;source-doc/base-drv/usb_state.c:77: if (p->type != USB_NOT_SUPPORTED) {
 	ld	l, e
 	ld	h, d
 	ld	a, (hl)
 	and	0x0f
 	jr	Z,l_get_usb_device_config_00108
-;source-doc/base-drv/usb_state.c:75: if (counter == device_index)
+;source-doc/base-drv/usb_state.c:78: if (counter == device_index)
 	ld	a, c
 	sub	b
-;source-doc/base-drv/usb_state.c:76: return p;
+;source-doc/base-drv/usb_state.c:79: return p;
 	jr	Z,l_get_usb_device_config_00109
-;source-doc/base-drv/usb_state.c:77: counter++;
+;source-doc/base-drv/usb_state.c:80: counter++;
 	inc	b
 l_get_usb_device_config_00108:
-;source-doc/base-drv/usb_state.c:73: for (device_config *p = first_device_config(usb_state); p; p = next_device_config(usb_state, p)) {
+;source-doc/base-drv/usb_state.c:76: for (device_config *p = first_device_config(usb_state); p; p = next_device_config(usb_state, p)) {
 	push	bc
 	ld	hl,_x
 	call	_next_device_config
 	pop	bc
 	jr	l_get_usb_device_config_00107
 l_get_usb_device_config_00105:
-;source-doc/base-drv/usb_state.c:81: return NULL; // is not a usb device
+;source-doc/base-drv/usb_state.c:84: return NULL; // is not a usb device
 	ld	de,0x0000
 l_get_usb_device_config_00109:
-;source-doc/base-drv/usb_state.c:82: }
+;source-doc/base-drv/usb_state.c:85: }
 	ret
diff --git a/Source/HBIOS/ch376-native/source-doc/base-drv/usb-init.c b/Source/HBIOS/ch376-native/source-doc/base-drv/usb-init.c
index fa7ba6f0..fb898799 100644
--- a/Source/HBIOS/ch376-native/source-doc/base-drv/usb-init.c
+++ b/Source/HBIOS/ch376-native/source-doc/base-drv/usb-init.c
@@ -65,7 +65,7 @@ void _chnative_init(bool forced) {
 
   usb_host_bus_reset();
 
-  for (uint8_t i = 0; i < (forced ? 10 : 5); i++) {
+  for (uint8_t i = 0; i < (forced ? 80 : 5); i++) {
     const uint8_t r = ch_very_short_wait_int_and_get_status();
 
     if (r == USB_INT_CONNECT) {
@@ -73,6 +73,23 @@ void _chnative_init(bool forced) {
 
       enumerate_all_devices();
 
+      if (forced && count_of_devices() == 0) {
+        print_string("\r\nUSB: SCANNING $");
+
+        for (i = 0; i < 10; i++) {
+          print_string(".$");
+          memset(get_usb_work_area(), 0, sizeof(_usb_state));
+          usb_host_bus_reset();
+
+          delay_medium();
+          enumerate_all_devices();
+
+          if (count_of_devices() > 0)
+            goto connected;
+        }
+      }
+
+    connected:
       USB_MODULE_LEDS = 0x03;
       return;
     }
diff --git a/Source/HBIOS/ch376-native/source-doc/base-drv/usb_state.c b/Source/HBIOS/ch376-native/source-doc/base-drv/usb_state.c
index fe6709b9..ce6e460d 100644
--- a/Source/HBIOS/ch376-native/source-doc/base-drv/usb_state.c
+++ b/Source/HBIOS/ch376-native/source-doc/base-drv/usb_state.c
@@ -10,20 +10,23 @@ const uint8_t device_config_sizes[_USB_LAST_DEVICE_TYPE] = {
 };
 
 // always usb work area
-device_config *find_device_config(const usb_device_type requested_type) {
+uint8_t count_of_devices(void) __sdcccall(1) {
   _usb_state *const p = get_usb_work_area();
 
+  uint8_t count = 0;
+
   const device_config *p_config = first_device_config(p);
   while (p_config) {
     const uint8_t type = p_config->type;
 
-    if (type == requested_type)
-      return (device_config *)p_config;
+    if (type != USB_IS_HUB && type)
+      count++;
+    ;
 
     p_config = next_device_config(p, p_config);
   };
 
-  return NULL;
+  return count;
 }
 
 // always search in boot
diff --git a/Source/HBIOS/ch376-native/source-doc/base-drv/usb_state.h b/Source/HBIOS/ch376-native/source-doc/base-drv/usb_state.h
index 87821f27..d5246a1b 100644
--- a/Source/HBIOS/ch376-native/source-doc/base-drv/usb_state.h
+++ b/Source/HBIOS/ch376-native/source-doc/base-drv/usb_state.h
@@ -20,7 +20,7 @@ typedef struct __usb_state {
 extern device_config *find_first_free(void);
 extern device_config *first_device_config(const _usb_state *const p) __sdcccall(1);
 extern device_config *next_device_config(const _usb_state *const usb_state, const device_config *const p) __sdcccall(1);
-extern device_config *find_device_config(const usb_device_type requested_type);
+extern uint8_t        count_of_devices(void) __sdcccall(1);
 
 extern device_config *get_usb_device_config(const uint8_t device_index) __sdcccall(1);