diff --git a/src/mame/mame.lst b/src/mame/mame.lst
index 66f144dac6e..92ef9c7a8b3 100644
--- a/src/mame/mame.lst
+++ b/src/mame/mame.lst
@@ -41164,6 +41164,9 @@ jwildb52a                       // (c) 199? Sigma
 jwildb52h                       // (c) 199? Sigma
 s8waysfc                        // (c) 1989 Sigma
 
+@source:sigma/sigmab88.cpp
+cool104
+
 @source:sigma/sigmab98.cpp
 animalc                         // (c) 2000 Sammy
 b3rinsya                        // b9805 (c) 1997 Sigma
diff --git a/src/mame/sigma/sigmab88.cpp b/src/mame/sigma/sigmab88.cpp
new file mode 100644
index 00000000000..457afbeea95
--- /dev/null
+++ b/src/mame/sigma/sigmab88.cpp
@@ -0,0 +1,90 @@
+// license:BSD-3-Clause
+// copyright-holders:David Haywood
+
+// HD641016 + HD63484 + YM3812
+// seems very much like B52, but reworked to use a newer CPU so the skeleton hookups are copy+pasted from there
+
+#include "emu.h"
+
+#include "cpu/h16/hd641016.h"
+#include "sound/ymopl.h"
+#include "video/hd63484.h"
+
+#include "emupal.h"
+#include "screen.h"
+#include "speaker.h"
+
+namespace {
+
+class sigmab88_state : public driver_device
+{
+public:
+	sigmab88_state(const machine_config &mconfig, device_type type, const char *tag)
+		: driver_device(mconfig, type, tag)
+		, m_maincpu(*this, "maincpu")
+		, m_palette(*this, "palette")
+	{
+	}
+
+	void sigmab88(machine_config &config);
+
+private:
+	void h16_map(address_map &map);
+	void hd63484_map(address_map &map);
+
+	required_device<hd641016_device> m_maincpu;
+	required_device<palette_device> m_palette;
+};
+
+
+void sigmab88_state::h16_map(address_map &map)
+{
+	map(0x000000, 0x07ffff).rom().region("maincpu", 0);
+	map(0xc00000, 0xc7ffff).rom().region("maincpu", 0);
+}
+
+void sigmab88_state::hd63484_map(address_map &map)
+{
+	map(0x00000, 0x1ffff).ram();
+}
+
+static INPUT_PORTS_START(sigmab88)
+INPUT_PORTS_END
+
+void sigmab88_state::sigmab88(machine_config &config)
+{
+	HD641016(config, m_maincpu, XTAL(20'000'000)/2);
+	m_maincpu->set_addrmap(AS_PROGRAM, &sigmab88_state::h16_map);
+
+	screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER));
+	screen.set_refresh_hz(60);
+	screen.set_vblank_time(ATTOSECONDS_IN_USEC(0));
+	screen.set_size(1024, 1024);
+	screen.set_visarea(0, 544-1, 0, 436-1);
+	screen.set_screen_update("hd63484", FUNC(hd63484_device::update_screen));
+	screen.set_palette(m_palette);
+
+	HD63484(config, "hd63484", XTAL(8'000'000)).set_addrmap(0, &sigmab88_state::hd63484_map);
+
+	PALETTE(config, m_palette).set_entries(16);
+
+	YM3812(config, "ymsnd", XTAL(3'579'545)).add_route(ALL_OUTPUTS, "mono", 1.0);
+
+	SPEAKER(config, "mono").front_center();
+}
+
+ROM_START( cool104 )
+	ROM_REGION(0x80000, "maincpu", 0)
+	ROM_LOAD16_BYTE("wwp2080-7213-1.bin", 0x00000, 0x40000, CRC(95b4b518) SHA1(1ac64131508999a5206a5b3e3efbc965419eb247))
+	ROM_LOAD16_BYTE("wwp2080-7213-2.bin", 0x00001, 0x40000, CRC(3489277d) SHA1(c51e165d6382f9b709f4b0070a5a43aa519cb0d6))
+
+	ROM_REGION(0x100000, "data", 0) // does this map to CPU space?
+	ROM_LOAD16_BYTE("grp0301-010-1.bin", 0x00000, 0x80000, CRC(fc00a817) SHA1(30f9d6ce9091e35e341cc6e57765f97453aa863f))
+	ROM_LOAD16_BYTE("grp0301-010-2.bin", 0x00001, 0x80000, CRC(a5b19862) SHA1(6552bcd481ba807c66c1b20f6809dbd4d886183a))
+
+	// should this have a colour PROM like b52?
+ROM_END
+
+} // anonymous namespace
+
+GAME( 199?, cool104,  0,        sigmab88, sigmab88, sigmab88_state, empty_init, ROT0, "Sigma", "Cool 104", MACHINE_IS_SKELETON )