diff --git a/src/mame/drivers/adm31.cpp b/src/mame/drivers/adm31.cpp
index 4dde60be1b6..bb1354bb1e2 100644
--- a/src/mame/drivers/adm31.cpp
+++ b/src/mame/drivers/adm31.cpp
@@ -298,22 +298,22 @@ static INPUT_PORTS_START(adm31)
 	PORT_DIPSETTING(0x0c, "4800")
 	PORT_DIPSETTING(0x0d, "7200")
 	PORT_DIPSETTING(0x0e, "9600")
-	PORT_DIPNAME(0x0f, 0x07, "Printer Baud Rate") PORT_DIPLOCATION("BS2:1,2,3,4")
+	PORT_DIPNAME(0xf0, 0x70, "Printer Baud Rate") PORT_DIPLOCATION("BS2:1,2,3,4")
 	PORT_DIPSETTING(0x00, "50")
-	PORT_DIPSETTING(0x01, "75")
-	PORT_DIPSETTING(0x02, "110")
-	PORT_DIPSETTING(0x03, "134.5")
-	PORT_DIPSETTING(0x04, "150")
-	PORT_DIPSETTING(0x05, "300")
-	PORT_DIPSETTING(0x06, "600")
-	PORT_DIPSETTING(0x07, "1200")
-	PORT_DIPSETTING(0x08, "1800")
-	PORT_DIPSETTING(0x09, "2000")
-	PORT_DIPSETTING(0x0a, "2400")
-	PORT_DIPSETTING(0x0b, "3600")
-	PORT_DIPSETTING(0x0c, "4800")
-	PORT_DIPSETTING(0x0d, "7200")
-	PORT_DIPSETTING(0x0e, "9600")
+	PORT_DIPSETTING(0x10, "75")
+	PORT_DIPSETTING(0x20, "110")
+	PORT_DIPSETTING(0x30, "134.5")
+	PORT_DIPSETTING(0x40, "150")
+	PORT_DIPSETTING(0x50, "300")
+	PORT_DIPSETTING(0x60, "600")
+	PORT_DIPSETTING(0x70, "1200")
+	PORT_DIPSETTING(0x80, "1800")
+	PORT_DIPSETTING(0x90, "2000")
+	PORT_DIPSETTING(0xa0, "2400")
+	PORT_DIPSETTING(0xb0, "3600")
+	PORT_DIPSETTING(0xc0, "4800")
+	PORT_DIPSETTING(0xd0, "7200")
+	PORT_DIPSETTING(0xe0, "9600")
 INPUT_PORTS_END
 
 void adm31_state::adm31(machine_config &config)