diff --git a/src/device/serial.c b/src/device/serial.c
index 15527fad4..d9178e566 100644
--- a/src/device/serial.c
+++ b/src/device/serial.c
@@ -129,7 +129,7 @@ serial_update_ints(serial_t *dev)
     }
 
     if (stat && (dev->irq != 0xff) && ((dev->mctrl & 8) || (dev->type == SERIAL_8250_PCJR))) {
-	if (dev->type >= SERIAL_NS16450)
+	if (dev->type >= SERIAL_16450)
 		picintlevel(1 << dev->irq);
 	else
 		picint(1 << dev->irq);
@@ -151,9 +151,9 @@ serial_clear_timeout(serial_t *dev)
 static void
 write_fifo(serial_t *dev, uint8_t dat)
 {
-    serial_log("write_fifo(%08X, %02X, %i, %i)\n", dev, dat, (dev->type >= SERIAL_NS16550) && dev->fifo_enabled, dev->rcvr_fifo_pos & 0x0f);
+    serial_log("write_fifo(%08X, %02X, %i, %i)\n", dev, dat, (dev->type >= SERIAL_16550) && dev->fifo_enabled, dev->rcvr_fifo_pos & 0x0f);
 
-    if ((dev->type >= SERIAL_NS16550) && dev->fifo_enabled) {
+    if ((dev->type >= SERIAL_16550) && dev->fifo_enabled) {
 	/* FIFO mode. */
 	timer_disable(&dev->timeout_timer);
 	/* Indicate overrun. */
@@ -189,7 +189,7 @@ write_fifo(serial_t *dev, uint8_t dat)
 void
 serial_write_fifo(serial_t *dev, uint8_t dat)
 {
-    serial_log("serial_write_fifo(%08X, %02X, %i, %i)\n", dev, dat, (dev->type >= SERIAL_NS16550) && dev->fifo_enabled, dev->rcvr_fifo_pos & 0x0f);
+    serial_log("serial_write_fifo(%08X, %02X, %i, %i)\n", dev, dat, (dev->type >= SERIAL_16550) && dev->fifo_enabled, dev->rcvr_fifo_pos & 0x0f);
 
     if (!(dev->mctrl & 0x10))
 	write_fifo(dev, dat);
@@ -371,7 +371,7 @@ serial_write(uint16_t addr, uint8_t val, void *p)
 		dev->int_status &= ~SERIAL_INT_TRANSMIT;
 		serial_update_ints(dev);
 
-		if ((dev->type >= SERIAL_NS16550) && dev->fifo_enabled && (dev->xmit_fifo_pos < 16)) {
+		if ((dev->type >= SERIAL_16550) && dev->fifo_enabled && (dev->xmit_fifo_pos < 16)) {
 			/* FIFO mode, begin transmitting. */
 			timer_on_auto(&dev->transmit_timer, dev->transmit_period);
 			dev->transmit_enabled |= 1;	/* Start moving. */
@@ -396,7 +396,7 @@ serial_write(uint16_t addr, uint8_t val, void *p)
 		serial_update_ints(dev);
 		break;
 	case 2:
-		if (dev->type >= SERIAL_NS16550) {
+		if (dev->type >= SERIAL_16550) {
 			if ((val ^ dev->fcr) & 0x01)
 				serial_reset_fifo(dev);
 			dev->fcr = val & 0xf9;
@@ -500,7 +500,7 @@ serial_write(uint16_t addr, uint8_t val, void *p)
 		serial_update_ints(dev);
 		break;
 	case 7:
-		if (dev->type >= SERIAL_NS16450)
+		if (dev->type >= SERIAL_16450)
 			dev->scratch = val;
 		break;
     }
@@ -522,7 +522,7 @@ serial_read(uint16_t addr, void *p)
 			break;
 		}
 
-		if ((dev->type >= SERIAL_NS16550) && dev->fifo_enabled) {
+		if ((dev->type >= SERIAL_16550) && dev->fifo_enabled) {
 			/* FIFO mode. */
 
 			serial_clear_timeout(dev);
@@ -718,12 +718,12 @@ serial_set_next_inst(int ni)
 void
 serial_standalone_init(void) {
 	for ( ; next_inst < 4; )
-		device_add_inst(&i8250_device, next_inst + 1);
+		device_add_inst(&ns8250_device, next_inst + 1);
 };
 
 
-const device_t i8250_device = {
-    "Intel 8250(-compatible) UART",
+const device_t ns8250_device = {
+    "National Semiconductor 8250(-compatible) UART",
     0,
     SERIAL_8250,
     serial_init, serial_close, NULL,
@@ -731,8 +731,8 @@ const device_t i8250_device = {
     NULL
 };
 
-const device_t i8250_pcjr_device = {
-    "Intel 8250(-compatible) UART for PCjr",
+const device_t ns8250_pcjr_device = {
+    "National Semiconductor 8250(-compatible) UART for PCjr",
     DEVICE_PCJR,
     SERIAL_8250_PCJR,
     serial_init, serial_close, NULL,
@@ -743,7 +743,7 @@ const device_t i8250_pcjr_device = {
 const device_t ns16450_device = {
     "National Semiconductor NS16450(-compatible) UART",
     0,
-    SERIAL_NS16450,
+    SERIAL_16450,
     serial_init, serial_close, NULL,
     { NULL }, serial_speed_changed, NULL,
     NULL
@@ -752,7 +752,43 @@ const device_t ns16450_device = {
 const device_t ns16550_device = {
     "National Semiconductor NS16550(-compatible) UART",
     0,
-    SERIAL_NS16550,
+    SERIAL_16550,
+    serial_init, serial_close, NULL,
+    { NULL }, serial_speed_changed, NULL,
+    NULL
+};
+
+const device_t ns16650_device = {
+    "Startech Semiconductor 16650(-compatible) UART",
+    0,
+    SERIAL_16650,
+    serial_init, serial_close, NULL,
+    { NULL }, serial_speed_changed, NULL,
+    NULL
+};
+
+const device_t ns16750_device = {
+    "Texas Instruments 16750(-compatible) UART",
+    0,
+    SERIAL_16750,
+    serial_init, serial_close, NULL,
+    { NULL }, serial_speed_changed, NULL,
+    NULL
+};
+
+const device_t ns16850_device = {
+    "Exar Corporation NS16850(-compatible) UART",
+    0,
+    SERIAL_16850,
+    serial_init, serial_close, NULL,
+    { NULL }, serial_speed_changed, NULL,
+    NULL
+};
+
+const device_t ns16950_device = {
+    "Oxford Semiconductor NS16950(-compatible) UART",
+    0,
+    SERIAL_16950,
     serial_init, serial_close, NULL,
     { NULL }, serial_speed_changed, NULL,
     NULL
diff --git a/src/include/86box/serial.h b/src/include/86box/serial.h
index 576c0c12e..5203c17f8 100644
--- a/src/include/86box/serial.h
+++ b/src/include/86box/serial.h
@@ -6,7 +6,8 @@
  *
  *		This file is part of the 86Box distribution.
  *
- *		Definitions for the NS8250/16450/16550 UART emulation.
+ *		Definitions for the NS8250/16450/16550/16650/16750/16850/16950
+ *      UART emulation.
  *
  *
  *
@@ -22,10 +23,14 @@
 # define EMU_SERIAL_H
 
 
-#define SERIAL_8250		0
+#define SERIAL_8250			0
 #define SERIAL_8250_PCJR	1
-#define SERIAL_NS16450		2
-#define SERIAL_NS16550		3
+#define SERIAL_16450		2
+#define SERIAL_16550		3
+#define SERIAL_16650		4
+#define SERIAL_16750		5
+#define SERIAL_16850		6
+#define SERIAL_16950		7
 
 #define SERIAL_FIFO_SIZE	16
 
@@ -39,8 +44,6 @@
 #define SERIAL4_ADDR		0x02e8
 #define SERIAL4_IRQ		3
 
-#define MAX_SERIAL		4
-
 
 struct serial_device_s;
 struct serial_s;
@@ -89,10 +92,14 @@ extern void	serial_standalone_init(void);
 extern void	serial_set_clock_src(serial_t *dev, double clock_src);
 extern void	serial_reset_port(serial_t *dev);
 
-extern const device_t	i8250_device;
-extern const device_t	i8250_pcjr_device;
+extern const device_t	ns8250_device;
+extern const device_t	ns8250_pcjr_device;
 extern const device_t	ns16450_device;
 extern const device_t	ns16550_device;
+extern const device_t	ns16650_device;
+extern const device_t	ns16750_device;
+extern const device_t	ns16850_device;
+extern const device_t	ns16950_device;
 
 
 #endif	/*EMU_SERIAL_H*/
diff --git a/src/machine/m_at_commodore.c b/src/machine/m_at_commodore.c
index 7d00e51bb..8aa75059f 100644
--- a/src/machine/m_at_commodore.c
+++ b/src/machine/m_at_commodore.c
@@ -112,7 +112,7 @@ machine_at_cmdpc_init(const machine_t *model)
     if (fdc_type == FDC_INTERNAL)
     device_add(&fdc_at_device);
 
-    cmd_uart = device_add(&i8250_device);
+    cmd_uart = device_add(&ns8250_device);
 
     cbm_io_init();
 
diff --git a/src/machine/m_pcjr.c b/src/machine/m_pcjr.c
index 482c26ed6..80c982bee 100644
--- a/src/machine/m_pcjr.c
+++ b/src/machine/m_pcjr.c
@@ -866,8 +866,8 @@ machine_pcjr_init(const machine_t *model)
 
     device_add(&fdc_pcjr_device);
 
-    device_add(&i8250_pcjr_device);
-    serial_set_next_inst(MAX_SERIAL);	/* So that serial_standalone_init() won't do anything. */
+    device_add(&ns8250_pcjr_device);
+    serial_set_next_inst(SERIAL_MAX);	/* So that serial_standalone_init() won't do anything. */
 
     return ret;
 }
diff --git a/src/machine/m_xt_zenith.c b/src/machine/m_xt_zenith.c
index 791ebdcd1..f820bfd2e 100644
--- a/src/machine/m_xt_zenith.c
+++ b/src/machine/m_xt_zenith.c
@@ -153,8 +153,8 @@ machine_xt_z184_init(const machine_t *model)
     lpt1_remove();	/* only one parallel port */
     lpt2_remove();
     lpt1_init(0x278);
-    device_add(&i8250_device);
-    serial_set_next_inst(MAX_SERIAL);	/* So that serial_standalone_init() won't do anything. */
+    device_add(&ns8250_device);
+    serial_set_next_inst(SERIAL_MAX);	/* So that serial_standalone_init() won't do anything. */
         
     device_add(&cga_device);