diff --git a/src/boards/18.cpp b/src/boards/18.cpp
index bbf65f69..844fed16 100644
--- a/src/boards/18.cpp
+++ b/src/boards/18.cpp
@@ -16,6 +16,9 @@
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * The Moero!! Pro Yakyuu series have an ADPCM chip with internal ROM,
+ * used for voice samples (not dumped, so emulation isn't possible)
  */
 
 #include "mapinc.h"
diff --git a/src/boards/72.cpp b/src/boards/72.cpp
index de5ec91d..ea74dc89 100644
--- a/src/boards/72.cpp
+++ b/src/boards/72.cpp
@@ -17,13 +17,14 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  *
- * Moero!! Pro Tennis have ADPCM codec on-board, PROM isn't dumped, emulation isn't
- * possible just now.
+ * Moero!! Pro Tennis and Moero!! Pro Yakyuu '88 Ketteiban have an ADPCM chip with
+ * internal ROM, used for voice samples (not dumped, so emulation isn't possible)
  */
 
 #include "mapinc.h"
 
 static uint8 preg, creg;
+static void (*Sync)(void);
 
 static SFORMAT StateRegs[] =
 {
@@ -32,13 +33,19 @@ static SFORMAT StateRegs[] =
 	{ 0 }
 };
 
-static void Sync(void) {
+static void M72Sync(void) {
 	setprg16(0x8000, preg);
 	setprg16(0xC000, ~0);
 	setchr8(creg);
 }
 
-static DECLFW(M72Write) {
+static void M92Sync(void) {
+	setprg16(0x8000, 0);
+	setprg16(0xC000, preg);
+	setchr8(creg);
+}
+
+static DECLFW(Write) {
 	if (V & 0x80)
 		preg = V & 0xF;
 	if (V & 0x40)
@@ -46,10 +53,10 @@ static DECLFW(M72Write) {
 	Sync();
 }
 
-static void M72Power(void) {
+static void Power(void) {
 	Sync();
 	SetReadHandler(0x8000, 0xFFFF, CartBR);
-	SetWriteHandler(0x6000, 0xFFFF, M72Write);
+	SetWriteHandler(0x8000, 0xFFFF, Write);
 }
 
 static void StateRestore(int version) {
@@ -57,7 +64,16 @@ static void StateRestore(int version) {
 }
 
 void Mapper72_Init(CartInfo *info) {
-	info->Power = M72Power;
+	Sync = M72Sync;
+	info->Power = Power;
+	GameStateRestore = StateRestore;
+
+	AddExState(&StateRegs, ~0, 0, 0);
+}
+
+void Mapper92_Init(CartInfo *info) {
+	Sync = M92Sync;
+	info->Power = Power;
 	GameStateRestore = StateRestore;
 
 	AddExState(&StateRegs, ~0, 0, 0);
diff --git a/src/boards/addrlatch.cpp b/src/boards/addrlatch.cpp
index 500231d6..4863210f 100644
--- a/src/boards/addrlatch.cpp
+++ b/src/boards/addrlatch.cpp
@@ -181,6 +181,7 @@ void Mapper59_Init(CartInfo *info) {
 }
 
 //------------------ Map 061 ---------------------------
+
 static void M61Sync(void) {
 	if (((latche & 0x10) << 1) ^ (latche & 0x20)) {
 		setprg16(0x8000, ((latche & 0xF) << 1) | (((latche & 0x20) >> 4)));
@@ -195,32 +196,6 @@ void Mapper61_Init(CartInfo *info) {
 	Latch_Init(info, M61Sync, NULL, 0x0000, 0x8000, 0xFFFF, 0);
 }
 
-//------------------ Map 092 ---------------------------
-// Another two-in-one mapper, two Jaleco carts uses similar
-// hardware, but with different wiring.
-// Original code provided by LULU
-// Additionally, PCB contains DSP extra sound chip, used for voice samples (unemulated)
-
-static void M92Sync(void) {
-	uint8 reg = latche & 0xF0;
-	setprg16(0x8000, 0);
-	if (latche >= 0x9000) {
-		switch (reg) {
-		case 0xD0: setprg16(0xc000, latche & 15); break;
-		case 0xE0: setchr8(latche & 15); break;
-		}
-	} else {
-		switch (reg) {
-		case 0xB0: setprg16(0xc000, latche & 15); break;
-		case 0x70: setchr8(latche & 15); break;
-		}
-	}
-}
-
-void Mapper92_Init(CartInfo *info) {
-	Latch_Init(info, M92Sync, NULL, 0x80B0, 0x8000, 0xFFFF, 0);
-}
-
 //------------------ Map 174 ---------------------------
 
 static void M174Sync(void) {
diff --git a/src/boards/datalatch.cpp b/src/boards/datalatch.cpp
index 624b5795..ff78e40e 100644
--- a/src/boards/datalatch.cpp
+++ b/src/boards/datalatch.cpp
@@ -309,7 +309,8 @@ void Mapper78_Init(CartInfo *info) {
 }
 
 //------------------ Map 86 ---------------------------
-
+// Moero!! Pro Yakyuu has an ADPCM chip with internal ROM,
+// used for voice samples (not dumped, so emulation isn't possible)
 static void M86Sync(void) {
 	setprg32(0x8000, (latche >> 4) & 3);
 	setchr8((latche & 3) | ((latche >> 4) & 4));