diff --git a/hash/ec1841.xml b/hash/ec1841.xml
index 9065ab2b5c1..22c117a89a7 100644
--- a/hash/ec1841.xml
+++ b/hash/ec1841.xml
@@ -125,4 +125,15 @@
 		</part>
 	</software>
 
-</softwarelist>
\ No newline at end of file
+	<software name="voice41">
+		<description>Speech syntesis software v.?.?</description>
+		<year>19??</year>
+		<publisher>??</publisher>
+		<part name="flop1" interface="floppy_5_25">
+			<dataarea name="flop" size="205475">
+				<rom name="ec1841-voice41.td0" size="205475" sha1="5561649fde90bccc743ce61a5d4a50e07cd5a674" crc="1f85afad" offset="0" />
+			</dataarea>
+		</part>
+	</software>
+
+</softwarelist>
diff --git a/src/emu/bus/pc_kbd/ec1841.c b/src/emu/bus/pc_kbd/ec1841.c
index b9e69ebabc7..b45050b291b 100644
--- a/src/emu/bus/pc_kbd/ec1841.c
+++ b/src/emu/bus/pc_kbd/ec1841.c
@@ -80,8 +80,7 @@ ADDRESS_MAP_END
 //-------------------------------------------------
 
 static MACHINE_CONFIG_FRAGMENT( ec_1841_keyboard )
-	// XXX check
-	MCFG_CPU_ADD(I8048_TAG, I8048, MCS48_LC_CLOCK(IND_U(47), CAP_P(20.7)))
+	MCFG_CPU_ADD(I8048_TAG, I8048, XTAL_5_46MHz)
 	MCFG_CPU_IO_MAP(ec_1841_keyboard_io)
 MACHINE_CONFIG_END
 
diff --git a/src/emu/drivers/xtal.h b/src/emu/drivers/xtal.h
index f93404209e3..7aed2542f26 100644
--- a/src/emu/drivers/xtal.h
+++ b/src/emu/drivers/xtal.h
@@ -71,6 +71,7 @@ enum
 	XTAL_4_9152MHz      = 4915200,
 	XTAL_5MHz           = 5000000,      /* Mutant Night */
 	XTAL_5_0688MHz      = 5068800,      /* Xerox 820, DEC VK100 */
+	XTAL_5_46MHz        = 5460000,      /* ec1840 and ec1841 keyboard */
 	XTAL_5_626MHz       = 5626000,      /* RCA CDP1869 PAL dot clock */
 	XTAL_5_67MHz        = 5670000,      /* RCA CDP1869 NTSC dot clock */
 	XTAL_5_7143MHz      = 5714300,      /* Cidelsa Destroyer */