diff --git a/src/emu/machine/jvshost.c b/src/emu/machine/jvshost.c
index dd3bf50d22f..c406afff250 100644
--- a/src/emu/machine/jvshost.c
+++ b/src/emu/machine/jvshost.c
@@ -48,17 +48,13 @@ void jvs_host::commit_raw()
 	// - have the message length without the two header bytes but with the checksum byte in the second byte
 	// - have at least one command byte
 	if(send_size < 3 || send_buffer[0] == 0x00 || send_buffer[1] != send_size-1) {
-		logerror("JVS checksum error\n");
-	} /*
-        Naomi suchie3 have bad working controls with this
-
-        // "This message is crap" doesn't exist so call it checksum error
-        recv_buffer[0] = 0x00;
-        recv_buffer[1] = 0x02;
-        recv_buffer[2] = 0x03;
-        recv_size = 3;
-
-    } else */ {
+                logerror("JVS checksum error\n");
+                // "This message is crap" doesn't exist so call it checksum error
+                recv_buffer[0] = 0x00;
+                recv_buffer[1] = 0x02;
+                recv_buffer[2] = 0x03;
+                recv_size = 3;
+        } else {
 		if(first_device) {
 			first_device->message(send_buffer[0], send_buffer+2, send_size-2, recv_buffer+2, recv_size);
 			recv_is_encoded = false;
@@ -146,7 +142,7 @@ void jvs_host::decode(UINT8 *buffer, UINT32 &size)
 	if(!size)
 		return;
 	UINT32 pos = 0;
-	for(UINT32 i=0; i<size-1; i++) {
+	for(UINT32 i=0; i<size; i++) {
 		UINT8 t = buffer[i];
 		if(!i && t == 0xe0)
 			continue;
@@ -156,5 +152,5 @@ void jvs_host::decode(UINT8 *buffer, UINT32 &size)
 		}
 		buffer[pos++] = t;
 	}
-	size = pos;
+	size = pos ? pos - 1 : 0;
 }
diff --git a/src/mame/machine/mie.c b/src/mame/machine/mie.c
index 8ae32c24d3d..45cc56b2cd7 100644
--- a/src/mame/machine/mie.c
+++ b/src/mame/machine/mie.c
@@ -33,8 +33,9 @@ static ADDRESS_MAP_START( mie_port, AS_IO, 8, mie_device)
 	AM_RANGE(0x00, 0x07) AM_READWRITE(gpio_r, gpio_w)
 	AM_RANGE(0x08, 0x08) AM_READWRITE(gpiodir_r, gpiodir_w)
 	AM_RANGE(0x0f, 0x0f) AM_READWRITE(adc_r, adc_w)
-	AM_RANGE(0x10, 0x10) AM_READWRITE(jvs_r, jvs_w)
+	AM_RANGE(0x10, 0x10) AM_READWRITE(jvs_r, jvs_w)		// ports 1x and 2x is standard UARTs, TODO handle it properly
 	AM_RANGE(0x12, 0x12) AM_WRITE(jvs_dest_w)
+	AM_RANGE(0x13, 0x13) AM_WRITE(jvs_lcr_w)
 	AM_RANGE(0x15, 0x15) AM_READ(jvs_status_r)
 	AM_RANGE(0x30, 0x30) AM_READWRITE(irq_enable_r, irq_enable_w)
 	AM_RANGE(0x50, 0x50) AM_READWRITE(maple_irqlevel_r, maple_irqlevel_w)
@@ -319,6 +320,9 @@ WRITE8_MEMBER(mie_device::lreg_w)
 
 READ8_MEMBER(mie_device::jvs_r)
 {
+	if (jvs_lcr & 0x80)
+		return 0;
+
 	const UINT8 *buf;
 	UINT32 size;
 	jvs->get_encoded_reply(buf, size);
@@ -329,9 +333,10 @@ READ8_MEMBER(mie_device::jvs_r)
 
 WRITE8_MEMBER(mie_device::jvs_w)
 {
-	// Hack until the ports are better understood
-	if(jvs_dest == 2)
-		jvs->push(data);
+	if (jvs_lcr & 0x80)
+		return;
+
+	jvs->push(data);
 }
 
 WRITE8_MEMBER(mie_device::jvs_dest_w)
@@ -359,6 +364,11 @@ WRITE8_MEMBER(mie_device::jvs_control_w)
 	jvs_control = data;
 }
 
+WRITE8_MEMBER(mie_device::jvs_lcr_w)
+{
+	jvs_lcr = data;
+}
+
 READ8_MEMBER(mie_device::jvs_sense_r)
 {
 	return 0x8c | (jvs->get_address_set_line() ? 2 : 0) | (jvs->get_presence_line() ? 0 : 1);
diff --git a/src/mame/machine/mie.h b/src/mame/machine/mie.h
index 7924afbbc1c..babe47ad830 100644
--- a/src/mame/machine/mie.h
+++ b/src/mame/machine/mie.h
@@ -61,6 +61,7 @@ public:
 	DECLARE_READ8_MEMBER(jvs_status_r);
 	DECLARE_WRITE8_MEMBER(jvs_control_w);
 	DECLARE_READ8_MEMBER(jvs_sense_r);
+	DECLARE_WRITE8_MEMBER(jvs_lcr_w);
 
 	DECLARE_READ8_MEMBER(read_ff);
 	DECLARE_READ8_MEMBER(read_00);
@@ -106,6 +107,7 @@ private:
 	UINT8 gpiodir, gpio_val[8];
 	UINT8 irq_enable, irq_pending, maple_irqlevel;
 	UINT8 jvs_control, jvs_dest;
+	UINT8 jvs_lcr;
 
 	void raise_irq(int level);
 	void recalc_irq();