New systems marked not working

------------------------------
ADDS 4000/260 [Bitsavers]

src/mame/adds/4000_260.cpp

@@ -0,0 +1,121 @@
+// license: BSD-3-Clause
+// copyright-holders: Dirk Best
+/***************************************************************************
+
+    ADDS 4000/260
+
+    ASCII/ANSI terminal
+
+    Hardware:
+    - P-80C32-16
+    - KM622560LP-7L (32k RAM)
+    - CY6225LL-70 (32k RAM)
+    - LSI Victor 006-9802760 REV B
+    - KM622560LP-7L x2 (32k RAM x2)
+    - 16 MHz XTAL, 44.976 MHz XTAL
+
+    TODO:
+    - Everything
+
+    Notes:
+    - Other models in this line: 4000/260C, 4000/260LF, 4000/260LFC
+    - Sold under the ADDS brand, but ADDS was part of SunRiver Data Systems
+      by then, which became Boundless Technologies.
+
+***************************************************************************/
+
+#include "emu.h"
+
+#include "cpu/mcs51/mcs51.h"
+
+
+namespace {
+
+
+//**************************************************************************
+//  TYPE DEFINITIONS
+//**************************************************************************
+
+class _4000_260_state : public driver_device
+{
+public:
+	_4000_260_state(const machine_config &mconfig, device_type type, const char *tag) :
+		driver_device(mconfig, type, tag),
+		m_maincpu(*this, "maincpu")
+	{ }
+
+	void _4000_260(machine_config &config);
+
+protected:
+	virtual void machine_start() override;
+	virtual void machine_reset() override;
+
+private:
+	required_device<i80c32_device> m_maincpu;
+
+	void mem_map(address_map &map);
+};
+
+
+//**************************************************************************
+//  ADDRESS MAPS
+//**************************************************************************
+
+void _4000_260_state::mem_map(address_map &map)
+{
+	map(0x0000, 0xffff).rom();
+}
+
+
+//**************************************************************************
+//  INPUT PORT DEFINITIONS
+//**************************************************************************
+
+static INPUT_PORTS_START( _4000_260 )
+INPUT_PORTS_END
+
+
+//**************************************************************************
+//  MACHINE EMULATION
+//**************************************************************************
+
+void _4000_260_state::machine_start()
+{
+}
+
+void _4000_260_state::machine_reset()
+{
+}
+
+
+//**************************************************************************
+//  MACHINE DEFINTIONS
+//**************************************************************************
+
+void _4000_260_state::_4000_260(machine_config &config)
+{
+	I80C32(config, m_maincpu, 16_MHz_XTAL);
+	m_maincpu->set_addrmap(AS_PROGRAM, &_4000_260_state::mem_map);
+}
+
+
+//**************************************************************************
+//  ROM DEFINITIONS
+//**************************************************************************
+
+ROM_START( 4000_260 )
+	ROM_REGION(0x40000, "maincpu", 0)
+	// 598-0010669 3.16 SunRiver Data Systems 1995
+	ROM_LOAD("4000_260.bin", 0x00000, 0x40000, CRC(b957cd1d) SHA1(1b1185174ba95dca004169e4e1b51b05c8991c43))
+ROM_END
+
+
+} // anonymous namespace
+
+
+//**************************************************************************
+//  SYSTEM DRIVERS
+//**************************************************************************
+
+//    YEAR  NAME      PARENT  COMPAT  MACHINE    INPUT      CLASS            INIT        COMPANY  FULLNAME    FLAGS
+COMP( 1995, 4000_260, 0,      0,      _4000_260, _4000_260, _4000_260_state, empty_init, "ADDS",  "4000/260", MACHINE_IS_SKELETON )

src/mame/mame.lst

@@ -405,6 +405,9 @@ super6                          //
 @source:adc/superslave.cpp
 superslv                        //
 
+@source:adds/4000_260.cpp       // (c) 1995 ADDS / SunRiver Data Systems / Boundless Technologies
+4000_260
+
 @source:adp/adp.cpp
 fashiong                        // (c) 1997
 fashiong2                       // (c) 1997