started a generic driver for TMS1000 MCU handhelds.

and put a skeleton of Enten Baseball in it, because ducks

src/mess/drivers/hh_tms1k.c

@@ -0,0 +1,87 @@
+// license:BSD-3-Clause
+// copyright-holders:hap
+/***************************************************************************
+
+  This driver is a collection of simple dedicated handheld and tabletop
+  toys based around the TMS1000 MCU series. Anything more complex or clearly
+  part of a series is (or will be) in its own driver.
+
+
+***************************************************************************/
+
+#include "emu.h"
+#include "cpu/tms0980/tms0980.h"
+#include "sound/speaker.h"
+
+#include "ebball.lh"
+
+
+class hh_tms1k_state : public driver_device
+{
+public:
+	hh_tms1k_state(const machine_config &mconfig, device_type type, const char *tag)
+		: driver_device(mconfig, type, tag),
+		m_maincpu(*this, "maincpu"),
+//		m_button_matrix(*this, "IN"),
+		m_speaker(*this, "speaker")
+	{ }
+
+	required_device<cpu_device> m_maincpu;
+//	required_ioport_array<3> m_button_matrix;
+	required_device<speaker_sound_device> m_speaker;
+
+	virtual void machine_start();
+};
+
+
+static INPUT_PORTS_START( ebball )
+INPUT_PORTS_END
+
+
+
+/***************************************************************************
+
+  Machine Config
+
+***************************************************************************/
+
+void hh_tms1k_state::machine_start()
+{
+}
+
+
+static MACHINE_CONFIG_START( ebball, hh_tms1k_state )
+
+	/* basic machine hardware */
+	MCFG_CPU_ADD("maincpu", TMS1000, 350000) // RC osc. R=43K, C=47pf -> ~350kHz
+
+	MCFG_DEFAULT_LAYOUT(layout_ebball)
+
+	/* no video! */
+
+	/* sound hardware */
+	MCFG_SPEAKER_STANDARD_MONO("mono")
+	MCFG_SOUND_ADD("speaker", SPEAKER_SOUND, 0)
+	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.25)
+MACHINE_CONFIG_END
+
+
+
+/***************************************************************************
+
+  Game driver(s)
+
+***************************************************************************/
+
+ROM_START( ebball )
+	ROM_REGION( 0x0400, "maincpu", 0 )
+	ROM_LOAD( "mp0914", 0x0000, 0x0400, CRC(3c6fb05b) SHA1(b2fe4b3ca72d6b4c9bfa84d67f64afdc215e7178) )
+
+	ROM_REGION( 867, "maincpu:mpla", 0 )
+	ROM_LOAD( "tms1000_ebball_mpla.pla", 0, 867, CRC(d33da3cf) SHA1(13c4ebbca227818db75e6db0d45b66ba5e207776) )
+	ROM_REGION( 365, "maincpu:opla", 0 )
+	ROM_LOAD( "tms1000_ebball_opla.pla", 0, 365, CRC(062bf5bb) SHA1(8d73ee35444299595961225528b153e3a5fe66bf) )
+ROM_END
+
+
+CONS( 1979, ebball, 0, 0, ebball, ebball, driver_device, 0, "Entex", "Baseball (Entex)", GAME_SUPPORTS_SAVE | GAME_NOT_WORKING )

src/mess/layout/ebball.lay

@@ -0,0 +1,27 @@
+<?xml version="1.0"?>
+<mamelayout version="2">
+
+<!-- define elements -->
+
+	<element name="static_black"><rect><color red="0.0" green="0.0" blue="0.0" /></rect></element>
+
+	<element name="digit" defstate="0">
+		<led7seg><color red="1.0" green="0.20" blue="0.22" /></led7seg>
+	</element>
+	<element name="led" defstate="0">
+		<disk state="0"><color red="0.2" green="0.04" blue="0.05" /></disk>
+		<disk state="1"><color red="1.0" green="0.20" blue="0.22" /></disk>
+	</element>
+
+
+<!-- build screen -->
+
+	<view name="Internal Layout">
+		<bounds left="0" right="64" top="0" bottom="64" />
+		<bezel element="static_black">
+			<bounds left="0" right="64" top="0" bottom="64" />
+		</bezel>
+
+
+	</view>
+</mamelayout>

src/mess/mess.lst

@@ -2616,3 +2616,4 @@ tmtennis
 alnchase
 edracula
 tc4
+ebball

src/mess/mess.mak

@@ -1781,6 +1781,7 @@ $(MESSOBJ)/ti.a:                \
 	$(MESS_MACHINE)/ti99/videowrp.o \
 	$(MESS_VIDEO)/733_asr.o     \
 	$(MESS_VIDEO)/911_vdt.o     \
+	$(MESS_DRIVERS)/hh_tms1k.o  \
 
 $(MESSOBJ)/tiger.a:             \
 	$(MESS_DRIVERS)/gamecom.o $(MESS_MACHINE)/gamecom.o $(MESS_VIDEO)/gamecom.o \
@@ -2144,6 +2145,7 @@ $(MESS_DRIVERS)/fidelz80.o: $(MESS_LAYOUT)/fidelz80.lh \
 $(MESS_DRIVERS)/gamecom.o:  $(MESS_LAYOUT)/gamecom.lh
 $(MESS_DRIVERS)/glasgow.o:  $(MESS_LAYOUT)/glasgow.lh
 $(MESS_DRIVERS)/h8.o:       $(MESS_LAYOUT)/h8.lh
+$(MESS_DRIVERS)/hh_tms1k.o: $(MESS_LAYOUT)/ebball.lh
 $(MESS_DRIVERS)/ie15.o:     $(MESS_LAYOUT)/ie15.lh
 $(MESS_DRIVERS)/instruct.o: $(MESS_LAYOUT)/instruct.lh
 $(MESS_DRIVERS)/k1003.o:    $(MESS_LAYOUT)/k1003.lh