diff --git a/src/emu/cpu/tlcs90/tlcs90.c b/src/emu/cpu/tlcs90/tlcs90.c
index ee4beb713a1..d1cd26701a3 100644
--- a/src/emu/cpu/tlcs90/tlcs90.c
+++ b/src/emu/cpu/tlcs90/tlcs90.c
@@ -1132,6 +1132,7 @@ INLINE UINT8 Read##N##_8(t90_Regs *cpustate)	{ \
 INLINE UINT16 Read##N##_16(t90_Regs *cpustate)	{ \
 	switch ( cpustate->mode##N )	{ \
 		case MODE_I16:		return cpustate->r##N; \
+		case MODE_D16:		return cpustate->r##N - 1; \
 		case MODE_R16:		return r16(cpustate, cpustate->r##N); \
 		case MODE_R16D8:	return r16(cpustate, cpustate->r##N) + (INT8)cpustate->r##N##b; \
 		case MODE_R16R8:	return r16(cpustate, cpustate->r##N) + (INT8)r8(cpustate, cpustate->r##N##b); \
diff --git a/src/mame/drivers/dynax.c b/src/mame/drivers/dynax.c
index b814be55aec..3adb8c0c8fa 100644
--- a/src/mame/drivers/dynax.c
+++ b/src/mame/drivers/dynax.c
@@ -4108,7 +4108,7 @@ static INPUT_PORTS_START( gekisha )
 	PORT_DIPNAME( 0x02, 0x02, "Unknown 4-1" )
 	PORT_DIPSETTING(    0x02, DEF_STR( Off ) )
 	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
-	PORT_DIPNAME( 0x04, 0x04, "Unknown 4-2" )
+	PORT_DIPNAME( 0x04, 0x04, "Auto Tsumo after Reach" )
 	PORT_DIPSETTING(    0x04, DEF_STR( Off ) )
 	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
 	PORT_DIPNAME( 0x08, 0x08, "Unknown 4-3" )