diff --git a/src/mame/drivers/ampex.cpp b/src/mame/drivers/ampex.cpp
index dce9b1a8ea5..815ca764ed1 100644
--- a/src/mame/drivers/ampex.cpp
+++ b/src/mame/drivers/ampex.cpp
@@ -256,7 +256,7 @@ static INPUT_PORTS_START( ampex )
 	PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR('[') PORT_CHAR('{') PORT_CODE(KEYCODE_OPENBRACE)
 	PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR(']') PORT_CHAR('}') PORT_CODE(KEYCODE_CLOSEBRACE)
 	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_UNKNOWN) // 0x1f (shifted: 0x8a) (Page New Line?)
-	PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_UNKNOWN) // 0x94
+	PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_UNKNOWN) // 0x94 (Line Ins?)
 
 	PORT_START("IN6")
 	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR('i') PORT_CHAR('I') PORT_CODE(KEYCODE_I)
@@ -284,7 +284,7 @@ static INPUT_PORTS_START( ampex )
 	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR(UCHAR_MAMEKEY(0_PAD)) PORT_CODE(KEYCODE_0_PAD)
 	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR(UCHAR_MAMEKEY(COMMA_PAD)) PORT_CODE(KEYCODE_COMMA_PAD)
 	PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_UNKNOWN) // 0x97 (Char Del?)
-	PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_UNKNOWN) // 0x0a (cursor down?)
+	PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR(UCHAR_MAMEKEY(DOWN)) PORT_CODE(KEYCODE_DOWN)
 	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_UNKNOWN) // 0x96 (Char Ins?)
 	PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_UNUSED)
 
@@ -293,9 +293,9 @@ static INPUT_PORTS_START( ampex )
 	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR(UCHAR_MAMEKEY(3_PAD)) PORT_CODE(KEYCODE_3_PAD)
 	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR(UCHAR_MAMEKEY(2_PAD)) PORT_CODE(KEYCODE_2_PAD)
 	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR(UCHAR_MAMEKEY(1_PAD)) PORT_CODE(KEYCODE_1_PAD)
-	PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_UNKNOWN) // 0x0c (cursor right?)
-	PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_UNKNOWN) // 0x1e (Home?)
-	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_UNKNOWN) // 0x7f (cursor left?)
+	PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR(UCHAR_MAMEKEY(RIGHT)) PORT_CODE(KEYCODE_RIGHT)
+	PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR(UCHAR_MAMEKEY(HOME)) PORT_CODE(KEYCODE_HOME)
+	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_UNKNOWN) // 0x7f (rub out?)
 	PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_UNUSED)
 
 	PORT_START("INA")
@@ -304,8 +304,8 @@ static INPUT_PORTS_START( ampex )
 	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR(UCHAR_MAMEKEY(5_PAD)) PORT_CODE(KEYCODE_5_PAD)
 	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR(UCHAR_MAMEKEY(4_PAD)) PORT_CODE(KEYCODE_4_PAD)
 	PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_UNKNOWN) // 0x95 (Line Del?)
-	PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_UNKNOWN) // 0x0b (cursor up?)
-	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_UNKNOWN) // 0x08 (Line Ins?)
+	PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR(UCHAR_MAMEKEY(UP)) PORT_CODE(KEYCODE_UP)
+	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR(UCHAR_MAMEKEY(LEFT)) PORT_CODE(KEYCODE_LEFT)
 	PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_UNUSED)
 
 	PORT_START("INB")