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diff --git a/src/mame/drivers/mk90.cpp b/src/mame/drivers/mk90.cpp
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+// license:BSD-3-Clause
+// copyright-holders:Miodrag Milanovic
+/***************************************************************************
+
+ Elektronika MK-90
+
+ 12/05/2009 Skeleton driver.
+
+
+ http://www.pisi.com.pl/piotr433/index.htm#mk90
+ http://www.taswegian.com/MOSCOW/mk-90.html
+
+This is a Soviet computer-calculator, very similar in looks to the Sharp.
+It has a LCD display. It cost about 1500 roubles, which is the wages for 6
+months for an average citizen.
+
+****************************************************************************/
+
+#include "emu.h"
+#include "cpu/t11/t11.h"
+
+
+class mk90_state : public driver_device
+{
+public:
+ mk90_state(const machine_config &mconfig, device_type type, const char *tag)
+ : driver_device(mconfig, type, tag) ,
+ m_maincpu(*this, "maincpu") { }
+
+ virtual void machine_reset();
+ virtual void video_start();
+ UINT32 screen_update_mk90(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
+ required_device<cpu_device> m_maincpu;
+};
+
+
+static ADDRESS_MAP_START(mk90_mem, AS_PROGRAM, 16, mk90_state)
+ ADDRESS_MAP_UNMAP_HIGH
+ AM_RANGE(0x0000, 0x3fff) AM_RAM // RAM
+ AM_RANGE(0x4000, 0x7fff) AM_ROM // Extension ROM
+ AM_RANGE(0x8000, 0xffff) AM_ROM // Main ROM
+// AM_RANGE(0xe800, 0xe801) LCD address
+// AM_RANGE(0xe802, 0xe803) LCD data
+// AM_RANGE(0xe810, 0xe810) serial bus controller data
+// AM_RANGE(0xe812, 0xe813) serial bus controller transfer rate
+// AM_RANGE(0xe814, 0xe814) serial bus controller control/status
+// AM_RANGE(0xe816, 0xe816) serial bus controller command
+// AM_RANGE(0xea00, 0xea7e) RTC
+ADDRESS_MAP_END
+
+/* Input ports */
+static INPUT_PORTS_START( mk90 )
+INPUT_PORTS_END
+
+
+void mk90_state::machine_reset()
+{
+}
+
+void mk90_state::video_start()
+{
+}
+
+UINT32 mk90_state::screen_update_mk90(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
+{
+ return 0;
+}
+
+static MACHINE_CONFIG_START( mk90, mk90_state )
+ /* basic machine hardware */
+ MCFG_CPU_ADD("maincpu", K1801VM2, XTAL_4MHz)
+ MCFG_T11_INITIAL_MODE(0x8000)
+ MCFG_CPU_PROGRAM_MAP(mk90_mem)
+
+
+ /* video hardware */
+ MCFG_SCREEN_ADD("screen", RASTER)
+ MCFG_SCREEN_REFRESH_RATE(50)
+ MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500)) /* not accurate */
+ MCFG_SCREEN_SIZE(640, 480)
+ MCFG_SCREEN_VISIBLE_AREA(0, 640-1, 0, 480-1)
+ MCFG_SCREEN_UPDATE_DRIVER(mk90_state, screen_update_mk90)
+ MCFG_SCREEN_PALETTE("palette")
+
+ MCFG_PALETTE_ADD_BLACK_AND_WHITE("palette")
+MACHINE_CONFIG_END
+
+/* ROM definition */
+ROM_START( mk90 )
+ ROM_REGION( 0x10000, "maincpu", ROMREGION_ERASEFF )
+ ROM_SYSTEM_BIOS(0, "bas1", "Basic 1")
+ ROMX_LOAD( "mk90ro10.bin", 0x8000, 0x8000, CRC(fac18038) SHA1(639f09a1be5f781f897603d0f799f7c6efd1b67f), ROM_BIOS(1))
+
+ ROM_SYSTEM_BIOS(1, "bas2", "Basic 2")
+ ROMX_LOAD( "mk90ro20.bin", 0x8000, 0x8000, CRC(d8b3a5f5) SHA1(8f7ab2d97c7466392b6354c0ea7017531c2133ae), ROM_BIOS(2))
+ ROMX_LOAD( "mk90ro20t.bin", 0x4000, 0x4000, CRC(0f4b9434) SHA1(c74bbde6d201913c9e67ef8e2abe14b784187f8d), ROM_BIOS(2)) // Expansion ROM
+ROM_END
+
+/* Driver */
+
+/* YEAR NAME PARENT COMPAT MACHINE INPUT INIT COMPANY FULLNAME FLAGS */
+COMP( 1988, mk90, 0, 0, mk90, mk90, driver_device, 0, "Elektronika", "MK-90", MACHINE_NOT_WORKING | MACHINE_NO_SOUND)