diff --git a/hash/cc40_cart.xml b/hash/cc40_cart.xml
index 81d33db2096..1313c51acef 100644
--- a/hash/cc40_cart.xml
+++ b/hash/cc40_cart.xml
@@ -66,7 +66,7 @@
 		<info name="usage" value="Load with RUN &quot;DIR&quot;, then load program from list" />
 		<part name="cart" interface="cc40_cart">
 			<dataarea name="rom" size="0x8000">
-				<rom name="games1.bin" size="0x8000" crc="54b52a26" sha1="1ad4c414b3aba73e10e30a2c2a2de8e92f96d46b" offset="0" status="baddump" />
+				<rom name="games1.bin" size="0x8000" crc="54b52a26" sha1="1ad4c414b3aba73e10e30a2c2a2de8e92f96d46b" offset="0" />
 			</dataarea>
 		</part>
 	</software>
diff --git a/src/emu/cpu/tms7000/tms70op.inc b/src/emu/cpu/tms7000/tms70op.inc
index 904e5d713cb..dfa661bf860 100644
--- a/src/emu/cpu/tms7000/tms70op.inc
+++ b/src/emu/cpu/tms7000/tms70op.inc
@@ -274,7 +274,7 @@ int tms7000_device::op_or(UINT8 param1, UINT8 param2)
 
 int tms7000_device::op_sbb(UINT8 param1, UINT8 param2)
 {
-	UINT8 t = param1 - param2 - (!GET_C());
+	UINT16 t = param1 - param2 - (!GET_C());
 	SET_NZ(t);
 	SET_C(~t);
 	return t;
diff --git a/src/mess/drivers/cc40.c b/src/mess/drivers/cc40.c
index 2f749a1b917..829792a15a6 100644
--- a/src/mess/drivers/cc40.c
+++ b/src/mess/drivers/cc40.c
@@ -57,7 +57,6 @@
 
 
   TODO:
-  - some strange bugs with Games I cartridge, bad dump or emulation bug?
   - other RAM configurations (6KB(default), 18KB, external)
   - understand bus_control_r/w
   - Hexbus interface and peripherals