New machines marked as NOT_WORKING:

- DECstation 5000/133 [R. Belmont, Al Kossow]

scripts/target/mame/mess.lua

@@ -1885,6 +1885,9 @@ files {
 createMESSProjects(_target, _subtarget, "dec")
 files {
 	MAME_DIR .. "src/mame/drivers/dct11em.cpp",
+	MAME_DIR .. "src/mame/drivers/decstation.cpp",
+	MAME_DIR .. "src/mame/machine/decioga.cpp",
+	MAME_DIR .. "src/mame/machine/decioga.h",
 	MAME_DIR .. "src/mame/drivers/dectalk.cpp",
 	MAME_DIR .. "src/mame/drivers/decwritr.cpp",
 	MAME_DIR .. "src/mame/drivers/pdp11.cpp",

src/mame/drivers/decstation.cpp

@@ -0,0 +1,145 @@
+// license:BSD-3-Clause
+// copyright-holders:R. Belmont
+/****************************************************************************
+
+    decstation.cpp: MIPS-based DECstation family
+
+	WANTED: all boot ROM dumps except 5000/133, all TURBOchannel card ROM dumps
+
+	Machine types:
+		DECstation 3100 (PMAX/KN01):
+			16.67 MHz R2000 with FPU and MMU
+			24 MiB max RAM
+			Serial: DEC "DZ" quad-UART (DC7085 gate array)
+			SCSI: DEC "SII" SCSI interface (DC7061 gate array)
+			Ethernet: AMD7990 "LANCE" controller
+			Monochrome or color video on-board
+		PMIN/KN01: 
+			Cheaper PMAX, 12.5 MHz R2000, same as PMAX
+
+		Personal DECstation 5000/xx (MAXine/KN02BA):
+			20, 25, or 33 MHz R3000 or 100 MHz R4000
+			40 MiB max RAM
+			Serial: DEC "DZ" quad-UART for keyboard/mouse, SCC8530 for modem/printer
+			SCSI: NCR53C94
+			Ethernet: AMD7990 "LANCE" controller
+			Audio: AMD AM79C30
+			Color 1024x768 8bpp video on-board
+			2 TURBOchannel slots
+
+		DECstation 5000/1xx: (3MIN/KN02DA):
+			20, 25, or 33 MHz R3000 or 100 MHz R4000
+			128 MiB max RAM
+			Serial: 2x SCC8530
+			SCSI: NCR53C94
+			Ethernet: AMD7990 "LANCE" controller
+			No on-board video
+			3 TURBOchannel slots
+
+		DECstation 5000/200: (3MAX/KN02):
+			25 MHz R3000
+			480 MiB max RAM
+			Serial: DEC "DZ" quad-UART
+			SCSI: NCR53C94
+			Ethernet: AMD7990 "LANCE" controllor
+
+		DECstation 5000/240, 5000/261 (3MAX+/KN03)
+			40 MHz R3400, or 120 MHz R4400.
+			480 MiB max RAM
+			Serial: 2x SCC8530
+			SCSI: NCR53C94
+			Ethernet: AMD7990 "LANCE" controller
+
+****************************************************************************/
+
+#include "emu.h"
+#include "cpu/mips/r3000.h"
+#include "machine/decioga.h"
+
+class decstation_state : public driver_device
+{
+public:
+	decstation_state(const machine_config &mconfig, device_type type, const char *tag)
+		: driver_device(mconfig, type, tag) ,
+		m_maincpu(*this, "maincpu"),
+		m_ioga(*this, "ioga")
+		{ }
+
+	void kn02da(machine_config &config);
+
+	void init_decstation();
+
+private:
+	virtual void machine_start() override;
+	virtual void machine_reset() override;
+	virtual void video_start() override;
+	required_device<cpu_device> m_maincpu;
+	required_device<dec_ioga_device> m_ioga;
+	void decstation_map(address_map &map);
+};
+
+/***************************************************************************
+    VIDEO HARDWARE
+***************************************************************************/
+
+void decstation_state::video_start()
+{
+}
+
+/***************************************************************************
+    MACHINE FUNCTIONS
+***************************************************************************/
+
+void decstation_state::machine_start()
+{
+}
+
+void decstation_state::machine_reset()
+{
+}
+
+/***************************************************************************
+    ADDRESS MAPS
+***************************************************************************/
+
+void decstation_state::decstation_map(address_map &map)
+{
+	map(0x00000000, 0x07ffffff).ram(); 	// full 128 MB
+	map(0x1c000000, 0x1dffffff).m(m_ioga, FUNC(dec_ioga_device::map));
+	map(0x1fc00000, 0x1fc3ffff).rom().region("user1", 0);
+}
+
+/***************************************************************************
+    MACHINE DRIVERS
+***************************************************************************/
+
+MACHINE_CONFIG_START(decstation_state::kn02da)
+	MCFG_DEVICE_ADD( "maincpu", R3041, 33000000 ) // FIXME: Should be R2000
+	MCFG_R3000_ENDIANNESS(ENDIANNESS_LITTLE)
+	MCFG_DEVICE_PROGRAM_MAP( decstation_map )
+
+	MCFG_DEVICE_ADD("ioga", DECSTATION_IOGA, XTAL(12'500'000))
+MACHINE_CONFIG_END
+
+static INPUT_PORTS_START( decstation )
+	PORT_START("UNUSED") // unused IN0
+	PORT_BIT(0xffff, IP_ACTIVE_HIGH, IPT_UNUSED)
+INPUT_PORTS_END
+
+void decstation_state::init_decstation()
+{
+}
+
+/***************************************************************************
+
+  ROM definition(s)
+
+***************************************************************************/
+
+ROM_START( ds5k133 )
+	ROM_REGION32_LE( 0x40000, "user1", 0 )
+	ROM_LOAD( "ds5000-133_005eb.bin", 0x000000, 0x040000, CRC(76a91d29) SHA1(140fcdb4fd2327daf764a35006d05fabfbee8da6) )
+ROM_END
+
+//    YEAR  NAME     PARENT  COMPAT  MACHINE  INPUT    CLASS          INIT          COMPANY                 FULLNAME                FLAGS
+COMP( 1992, ds5k133, 0,      0,      kn02da, decstation, decstation_state, init_decstation, "Digital Equipment Corporation", "DECstation 5000/133", MACHINE_NOT_WORKING | MACHINE_NO_SOUND )

src/mame/machine/decioga.cpp

@@ -0,0 +1,49 @@
+// license:BSD-3-Clause
+// copyright-holders:R. Belmont
+/******************************************************************************
+*
+*   MIPS DECstation I/O Gate Array emulation
+*
+*
+*/
+
+#include "decioga.h"
+
+DEFINE_DEVICE_TYPE(DECSTATION_IOGA, dec_ioga_device, "decioga", "DECstation I/O Gate Array")
+
+void dec_ioga_device::map(address_map &map)
+{
+	map(0x040100, 0x040103).rw(FUNC(dec_ioga_device::csr_r), FUNC(dec_ioga_device::csr_w)); 
+}
+
+dec_ioga_device::dec_ioga_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
+	: device_t(mconfig, DECSTATION_IOGA, tag, owner, clock)
+{
+}
+
+void dec_ioga_device::device_start()
+{
+	save_item(NAME(m_csr));
+}
+
+void dec_ioga_device::device_reset()
+{
+}
+
+READ32_MEMBER(dec_ioga_device::csr_r)
+{
+	return m_csr;
+}
+
+WRITE32_MEMBER(dec_ioga_device::csr_w)
+{
+	COMBINE_DATA(&m_csr);
+#if 0
+	printf("%08x to CSR: diag LEDs [", m_csr);
+	for (int i = 7; i >= 0; i--)
+	{
+		printf("%c", (m_csr & (1<<i)) ? 'O' : '.');
+	}
+	printf("]\n");
+#endif
+}

src/mame/machine/decioga.h

@@ -0,0 +1,42 @@
+// license:BSD-3-Clause
+// copyright-holders:R. Belmont
+/******************************************************************************
+*
+*   MIPS DECstation I/O Gate Array emulation
+*
+*
+*/
+
+#ifndef MAME_MACHINE_DECIOGA_H
+#define MAME_MACHINE_DECIOGA_H
+
+#pragma once
+
+#include "emu.h"
+
+class dec_ioga_device : public device_t
+{
+public:
+    dec_ioga_device(const machine_config &mconfig, const char *tag, device_t *owner)
+    	: dec_ioga_device(mconfig, tag, owner, (uint32_t)0)
+    {
+	}
+
+    dec_ioga_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
+
+	void map(address_map &map);
+
+protected:
+    virtual void device_start() override;
+    virtual void device_reset() override;
+
+	DECLARE_READ32_MEMBER(csr_r);
+	DECLARE_WRITE32_MEMBER(csr_w);
+
+private:
+	uint32_t m_csr;
+};
+
+DECLARE_DEVICE_TYPE(DECSTATION_IOGA, dec_ioga_device)
+
+#endif // MAME_MACHINE_DECIOGA_H

src/mame/mame.lst

@@ -11362,6 +11362,9 @@ czeroize                        // 37 1983.10 Zeroize
 decocass                        //
 decomult                        //
 
+@source:decstation.cpp
+ds5k133                         // 1993 Digital Equipment Corporation (DECstation 5000/133)
+
 @source:dectalk.cpp
 dectalk                         // 1983 Digital Equipment Corporation