New machines marked as NOT_WORKING

---
Siemens PC-MX2 [Plamen Mihaylov]

scripts/target/mame/mess.lua

@@ -3828,6 +3828,7 @@ createMESSProjects(_target, _subtarget, "siemens")
 files {
 	MAME_DIR .. "src/mame/drivers/bitel.cpp",
 	MAME_DIR .. "src/mame/drivers/pcd.cpp",
+	MAME_DIR .. "src/mame/drivers/pcmx2.cpp",
 	MAME_DIR .. "src/mame/machine/pcd_kbd.cpp",
 	MAME_DIR .. "src/mame/machine/pcd_kbd.h",
 	MAME_DIR .. "src/mame/video/pcd.cpp",

src/mame/drivers/pcmx2.cpp

@@ -0,0 +1,151 @@
+// license:BSD-3-Clause
+// copyright-holders:Patrick Mackinlay
+
+/*
+ * Siemens PC-MX2
+ *
+ * Sources:
+ *   - http://www.cpu-ns32k.net/Siemens.html
+ *   - https://mx300i.narten.de/view_board.cfm?5EF287A1ABC3F4DCAFEA2BC2FAB8C4000E50392BD4C3E389826E8E68AC9F53F3BE16A107EFC767
+ *
+ * TODO:
+ *   - skeleton only
+ */
+
+#include "emu.h"
+
+// cpu board hardware
+#include "cpu/ns32000/ns32000.h"
+#include "machine/ns32081.h"
+#include "machine/ns32082.h"
+#include "machine/ns32202.h"
+#include "machine/mc146818.h"
+
+// dueai board hardware
+#include "cpu/i86/i186.h"
+#include "machine/z80scc.h"
+
+#define VERBOSE 0
+#include "logmacro.h"
+
+namespace {
+
+class pcmx2_state : public driver_device
+{
+public:
+	pcmx2_state(machine_config const &mconfig, device_type type, char const *tag)
+		: driver_device(mconfig, type, tag)
+		, m_cpu(*this, "cpu")
+		, m_fpu(*this, "fpu")
+		, m_mmu(*this, "mmu")
+		, m_icu(*this, "icu")
+		, m_rtc(*this, "rtc")
+		, m_dueai_cpu(*this, "dueai_cpu")
+		, m_dueai_scc(*this, "dueai_scc")
+		, m_boot_view(*this, "boot_view")
+	{
+	}
+
+protected:
+	// driver_device overrides
+	virtual void machine_start() override;
+	virtual void machine_reset() override;
+
+	// address maps
+	template <unsigned ST> void cpu_map(address_map &map);
+	void dueai_mem_map(address_map &map);
+	void dueai_pio_map(address_map &map);
+
+public:
+	// machine config
+	void pcmx2(machine_config &config);
+
+protected:
+	required_device<ns32016_device> m_cpu;
+	required_device<ns32081_device> m_fpu;
+	required_device<ns32082_device> m_mmu;
+	required_device<ns32202_device> m_icu;
+	required_device<mc146818_device> m_rtc;
+
+	required_device<i80186_cpu_device> m_dueai_cpu;
+	required_device<z80scc_device> m_dueai_scc;
+
+private:
+	memory_view m_boot_view;
+};
+
+void pcmx2_state::machine_start()
+{
+}
+
+void pcmx2_state::machine_reset()
+{
+	m_boot_view.select(0);
+}
+
+template <unsigned ST> void pcmx2_state::cpu_map(address_map &map)
+{
+	if (ST == 0)
+	{
+		map(0x000000, 0x0fffff).view(m_boot_view);
+
+		m_boot_view[0](0x000000, 0x007fff).rom().region("eprom", 0);
+		m_boot_view[1](0x000000, 0x0fffff).ram();
+	}
+
+	map(0xfe0000, 0xfe7fff).rom().region("eprom", 0);
+
+	map(0xff8500, 0xff8500).lw8([this](u8 data) { m_boot_view.select(data); }, "boot_view_w");
+
+	map(0xfffe00, 0xfffeff).m(m_icu, FUNC(ns32202_device::map<BIT(ST, 1)>)).umask16(0x00ff);
+}
+
+void pcmx2_state::dueai_mem_map(address_map &map)
+{
+	map(0x000000, 0x01ffff).ram();
+
+	map(0x0fe000, 0x0fffff).rom().region("dueai", 0);
+}
+
+void pcmx2_state::dueai_pio_map(address_map &map)
+{
+	map(0x0000, 0x0003).rw(m_dueai_scc, FUNC(z80scc_device::ab_dc_r), FUNC(z80scc_device::ab_dc_w));
+}
+
+void pcmx2_state::pcmx2(machine_config &config)
+{
+	NS32016(config, m_cpu, 20_MHz_XTAL / 2);
+	m_cpu->set_addrmap(0, &pcmx2_state::cpu_map<0>);
+	m_cpu->set_addrmap(4, &pcmx2_state::cpu_map<4>);
+
+	NS32081(config, m_fpu, 20_MHz_XTAL / 2);
+	m_cpu->set_fpu(m_fpu);
+
+	NS32082(config, m_mmu, 20_MHz_XTAL / 2);
+	m_cpu->set_mmu(m_mmu);
+
+	NS32202(config, m_icu, 20_MHz_XTAL / 2);
+	m_icu->out_int().set_inputline(m_cpu, INPUT_LINE_IRQ0).invert();
+
+	MC146818(config, m_rtc, 32.768_kHz_XTAL);
+
+	I80186(config, m_dueai_cpu, 16_MHz_XTAL / 2);
+	m_dueai_cpu->set_addrmap(AS_PROGRAM, &pcmx2_state::dueai_mem_map);
+	m_dueai_cpu->set_addrmap(AS_IO, &pcmx2_state::dueai_pio_map);
+
+	SCC8530N(config, m_dueai_scc, 7.3728_MHz_XTAL);
+}
+
+ROM_START(pcmx2)
+	ROM_REGION16_LE(0x8000, "eprom", 0)
+	ROMX_LOAD("361d0333d053__e01735_ine.d53", 0x0000, 0x4000, CRC(b5eefb64) SHA1(a71a7daf9a8f0481d564bfc4d7ed5eb955f8665f), ROM_SKIP(1))
+	ROMX_LOAD("361d0333d054__e01725_ine.d54", 0x0001, 0x4000, CRC(3a3c6b6e) SHA1(5302fd79c89e0b4d164c639e2d73f4b9a279ddcb), ROM_SKIP(1))
+
+	ROM_REGION16_LE(0x2000, "dueai", 0)
+	ROM_LOAD("d277__e00_410__d3_17e4.d61", 0x0000, 0x2000, CRC(31415348) SHA1(1407dac077b1f9aec5f9063711c3ab2c517cc9e8))
+ROM_END
+
+}
+
+/*   YEAR   NAME   PARENT  COMPAT  MACHINE  INPUT  CLASS        INIT        COMPANY    FULLNAME  FLAGS */
+COMP(1986?, pcmx2, 0,      0,      pcmx2,   0,     pcmx2_state, empty_init, "Siemens", "PC-MX2", MACHINE_IS_SKELETON)

src/mame/mame.lst

@@ -34304,6 +34304,9 @@ spool3i                         // (c) 1990 Data East Corporation + I-Vics licen
 @source:pcm.cpp
 pcm                             // PC/M Mugler
 
+@source:pcmx2.cpp
+pcmx2                           // Siemens PC-MX2
+
 @source:pcw.cpp
 pcw10                           // 198? PCW10
 pcw8256                         // 1985 PCW8256