diff --git a/util/superiotool/smsc.c b/util/superiotool/smsc.c
index 0b7b7fba7e..8c2a8c98fc 100644
--- a/util/superiotool/smsc.c
+++ b/util/superiotool/smsc.c
@@ -36,6 +36,49 @@ static const struct superio_registers reg_table[] = {
 		{EOT}}},
 	{0x42, "FDC37B80x/FDC37M707", {
 		{EOT}}},
+	{0x09, "FDC37N958FR", {	/* Found in e.g. Dell Latitude CPi A366XT. */
+		{NOLDN, NULL,
+			{0x03,0x07,0x20,0x21,0x22,0x23,0x24,0x26,0x27,0x28,
+			 0x2b,0x2c,0x2d,0x2e,0x2f,EOT},
+			{0x03,NANA,0x44,0x00,0x00,0x00,0x04,MISC,MISC,0x00,
+			 NANA,NANA,NANA,NANA,NANA,EOT}},
+		{0x0, "Floppy",
+			{0x30,0x60,0x61,0x70,0x74,0xf0,0xf1,0xf2,0xf4,0xf5,
+			 EOT},
+			{0x00,0x03,0xf0,0x06,0x02,0x0e,0x00,0xff,0x00,0x00,
+			 EOT}},
+		{0x3, "Parallel port",
+			{0x30,0x60,0x61,0x70,0x74,0xf0,0xf1,EOT},
+			{0x00,0x00,0x00,0x00,0x04,0x3c,0x00,EOT}},
+		{0x4, "COM1",
+			{0x30,0x60,0x61,0x70,0xf0,EOT},
+			{0x00,0x00,0x00,0x00,0x00,EOT}},
+		{0x5, "COM2",
+			{0x30,0x60,0x61,0x62,0x63,0x70,0x74,0xf0,0xf1,0xf2,
+			 EOT},
+			{NANA,0x00,0x00,0x00,0x00,0x00,0x04,0x00,0x02,0x03,
+			 EOT}},
+		{0x6, "Real-time clock (RTC)",
+			{0x30,0x62,0x63,0x70,0xf0,EOT},
+			{0x00,0x00,0x70,0x00,0x00,EOT}},
+		{0x7, "Keyboard",
+			{0x30,0x70,0x72,0xf0,EOT},
+			{0x00,0x00,0x00,0x00,EOT}},
+		{0x8, "Aux I/O",
+			{0x30,0xb0,0xb1,0xb2,0xb3,0xb8,0xc0,0xc1,0xc2,0xc3,
+			 0xc4,0xc5,0xc6,0xc8,0xca,0xcb,0xcc,0xd0,0xd1,0xd2,
+			 0xd3,0xd4,0xd5,0xd6,0xd7,0xe0,0xe1,0xe2,0xe3,0xe4,
+			 0xe5,0xe6,0xe7,0xef,0xf0,0xf1,0xf2,0xf3,0xf4,0xf6,
+			 0xf9,0xfa,EOT},
+			{0x00,NANA,NANA,NANA,NANA,NANA,NANA,0x01,NANA,NANA,
+			 NANA,0x00,NANA,NANA,NANA,NANA,NANA,NANA,NANA,NANA,
+			 NANA,NANA,NANA,NANA,NANA,NANA,NANA,NANA,NANA,NANA,
+			 NANA,NANA,NANA,NANA,NANA,0x00,0x00,0x00,0x00,NANA,
+			 NANA,NANA,EOT}},
+		{0xa, "ACPI",
+			{0x30,0x60,0x61,0x70,0xf0,EOT},
+			{0x00,0x00,0x00,NANA,NANA,EOT}},
+		{EOT}}},
 	{0x44, "FDC37B78x", {
 		{NOLDN, NULL,
 			{0x03,0x07,0x20,0x21,0x22,0x23,0x24,0x26,0x27,0x28,