New machines marked as NOT_WORKING

---
NEC EWS4800/310 [Plamen Mihaylov, Patrick Mackinlay]

scripts/target/mame/mess.lua

@@ -3021,6 +3021,7 @@ files {
 createMESSProjects(_target, _subtarget, "nec")
 files {
 	MAME_DIR .. "src/mame/drivers/apc.cpp",
+	MAME_DIR .. "src/mame/drivers/ews4800.cpp",
 	MAME_DIR .. "src/mame/drivers/hh_ucom4.cpp",
 	MAME_DIR .. "src/mame/drivers/pce.cpp",
 	MAME_DIR .. "src/mame/includes/pce.h",

src/mame/drivers/ews4800.cpp

@@ -0,0 +1,184 @@
+// license:BSD-3-Clause
+// copyright-holders:Patrick Mackinlay
+
+/*
+ * NEC EWS4800 systems.
+ *
+ * Sources:
+ *  - http://www.jira-net.or.jp/vm/data/1993090101/1993090101knr/4-1-14.pdf
+ *  - http://wiki.netbsd.org/ports/ews4800mips/
+ *
+ * TODO:
+ *  - everything
+ */
+
+#include "emu.h"
+
+// processors and memory
+#include "cpu/mips/r4000.h"
+#include "machine/ram.h"
+
+// i/o devices
+#include "machine/z80scc.h"
+#include "machine/am79c90.h"
+#include "machine/timekpr.h"
+#include "machine/ncr5390.h"
+
+// busses and connectors
+#include "machine/nscsi_bus.h"
+#include "bus/nscsi/cd.h"
+#include "bus/nscsi/hd.h"
+#include "bus/rs232/rs232.h"
+
+#include "debugger.h"
+
+#define LOG_GENERAL (1U << 0)
+
+#define VERBOSE 0
+#include "logmacro.h"
+
+namespace {
+
+class ews4800_state : public driver_device
+{
+public:
+	ews4800_state(machine_config const &mconfig, device_type type, char const *tag)
+		: driver_device(mconfig, type, tag)
+		, m_cpu(*this, "cpu")
+		, m_ram(*this, "ram")
+		, m_rtc(*this, "rtc")
+		, m_scc(*this, "scc%u", 0U)
+		, m_scsibus(*this, "scsi")
+		, m_scsi(*this, "scsi:7:ncr53c96")
+		, m_net(*this, "net")
+	{
+	}
+
+	// machine config
+	void ews4800_310(machine_config &config);
+
+	void init();
+
+protected:
+	// driver_device overrides
+	virtual void machine_start() override;
+	virtual void machine_reset() override;
+
+	// address maps
+	void cpu_map(address_map &map);
+
+	u16 lance_r(offs_t offset, u16 mem_mask = 0xffff);
+	void lance_w(offs_t offset, u16 data, u16 mem_mask = 0xffff);
+
+private:
+	// processors and memory
+	required_device<r4000_device> m_cpu;
+	required_device<ram_device> m_ram;
+
+	// i/o devices
+	required_device<m48t02_device> m_rtc;
+	required_device_array<z80scc_device, 2> m_scc;
+	required_device<nscsi_bus_device> m_scsibus;
+	required_device<ncr53c94_device> m_scsi;
+	required_device<am7990_device> m_net;
+};
+
+void ews4800_state::machine_start()
+{
+}
+
+void ews4800_state::machine_reset()
+{
+}
+
+void ews4800_state::init()
+{
+	// map the configured ram
+	m_cpu->space(0).install_ram(0x00000000, m_ram->mask(), m_ram->pointer());
+}
+
+
+void ews4800_state::cpu_map(address_map &map)
+{
+	map(0x1fc00000, 0x1fcfffff).rom().region("eprom", 0);
+}
+
+u16 ews4800_state::lance_r(offs_t offset, u16 mem_mask)
+{
+	return 0;
+}
+
+void ews4800_state::lance_w(offs_t offset, u16 data, u16 mem_mask)
+{
+}
+
+static void ews4800_scsi_devices(device_slot_interface &device)
+{
+	device.option_add("harddisk", NSCSI_HARDDISK);
+	device.option_add("cdrom", NSCSI_CDROM);
+}
+
+/*
+ * irq  function
+ *  1   fdd, printer
+ *  2   ethernet, scsi
+ *  3   vme?
+ *  4   serial
+ *  5   clock
+ */
+void ews4800_state::ews4800_310(machine_config &config)
+{
+	R4000(config, m_cpu, 40_MHz_XTAL);
+	m_cpu->set_addrmap(AS_PROGRAM, &ews4800_state::cpu_map);
+
+	// 8 SIMM slots
+	RAM(config, m_ram);
+	m_ram->set_default_size("16M");
+	m_ram->set_extra_options("80M,144M");
+	m_ram->set_default_value(0);
+
+	// scsi bus and devices
+	NSCSI_BUS(config, m_scsibus);
+	NSCSI_CONNECTOR(config, "scsi:0", ews4800_scsi_devices, "harddisk");
+	NSCSI_CONNECTOR(config, "scsi:1", ews4800_scsi_devices, nullptr);
+	NSCSI_CONNECTOR(config, "scsi:2", ews4800_scsi_devices, nullptr);
+	NSCSI_CONNECTOR(config, "scsi:3", ews4800_scsi_devices, nullptr);
+	NSCSI_CONNECTOR(config, "scsi:4", ews4800_scsi_devices, nullptr);
+	NSCSI_CONNECTOR(config, "scsi:5", ews4800_scsi_devices, nullptr);
+	NSCSI_CONNECTOR(config, "scsi:6", ews4800_scsi_devices, nullptr);
+
+	// scsi host adapter (NCR53C96)
+	NSCSI_CONNECTOR(config, "scsi:7").option_set("ncr53c96", NCR53C94).clock(24_MHz_XTAL).machine_config(
+		[this](device_t *device)
+		{
+			ncr53c94_device &adapter = downcast<ncr53c94_device &>(*device);
+
+			adapter.set_busmd(ncr53c94_device::busmd_t::BUSMD_1);
+			//adapter.irq_handler_cb()
+			//adapter.drq_handler_cb()
+		});
+
+	// ethernet
+	AM7990(config, m_net);
+	//m_net->intr_out()
+	m_net->dma_in().set(FUNC(ews4800_state::lance_r));
+	m_net->dma_out().set(FUNC(ews4800_state::lance_w));
+
+	// mouse on channel A, keyboard on channel B?
+	SCC85230(config, m_scc[0], 4.915200_MHz_XTAL); // TODO: clock unconfirmed
+	SCC85230(config, m_scc[1], 4.915200_MHz_XTAL); // TODO: clock unconfirmed
+
+	M48T02(config, m_rtc);
+}
+
+ROM_START(ews4800_310)
+	ROM_REGION64_BE(0x100000, "eprom", 0)
+	ROM_SYSTEM_BIOS(0, "ews4800_310", "ews4800_310")
+	ROMX_LOAD("g8ppg__0100.a01f2", 0x00000, 0x80000, CRC(a1e25ce7) SHA1(cfc5e2b203bf6018b04980deeee43afa202dea7c), ROM_BIOS(0))
+	ROMX_LOAD("g8ppg__0200.a01f",  0x80000, 0x80000, CRC(d610f20d) SHA1(f8476bf91111b8023ff7984e5e9a8575e48ed5df), ROM_BIOS(0))
+ROM_END
+
+} // anonymous namespace
+
+/*   YEAR   NAME         PARENT  COMPAT  MACHINE      INPUT  CLASS          INIT  COMPANY  FULLNAME       FLAGS */
+COMP(1993,  ews4800_310, 0,      0,      ews4800_310, 0,     ews4800_state, init, "NEC",   "EWS4800/310", MACHINE_IS_SKELETON)

src/mame/mame.lst

@@ -13353,6 +13353,9 @@ eva24                           //
 @source:evmbug.cpp
 evmbug                          //
 
+@source:ews4800.cpp
+ews4800_310                     // NEC EWS4800/310
+
 @source:excali64.cpp
 excali64                        //