// license:BSD-3-Clause // copyright-holders:Miodrag Milanovic /*************************************************************************** Elektronika MK-90 2009-05-12 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. Status: Starts in the weeds. ****************************************************************************/ #include "emu.h" #include "cpu/t11/t11.h" #include "emupal.h" #include "screen.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") { } void mk90(machine_config &config); private: virtual void machine_reset() override; virtual void machine_start() override; void mem_map(address_map &map); uint32_t screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect); required_device m_maincpu; }; void mk90_state::mem_map(address_map &map) { map.unmap_value_high(); map(0x0000, 0x3fff).ram(); // RAM map(0x4000, 0x7fff).rom(); // Extension ROM map(0x8000, 0xffff).rom(); // Main ROM // map(0xe800, 0xe801) LCD address // map(0xe802, 0xe803) LCD data // map(0xe810, 0xe810) serial bus controller data // map(0xe812, 0xe813) serial bus controller transfer rate // map(0xe814, 0xe814) serial bus controller control/status // map(0xe816, 0xe816) serial bus controller command // map(0xea00, 0xea7e) RTC } /* Input ports */ static INPUT_PORTS_START( mk90 ) INPUT_PORTS_END void mk90_state::machine_reset() { } void mk90_state::machine_start() { } uint32_t mk90_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) { return 0; } void mk90_state::mk90(machine_config &config) { /* basic machine hardware */ K1801VM2(config, m_maincpu, XTAL(4'000'000)); m_maincpu->set_initial_mode(0x8000); m_maincpu->set_addrmap(AS_PROGRAM, &mk90_state::mem_map); /* video hardware */ screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER)); screen.set_refresh_hz(50); screen.set_vblank_time(ATTOSECONDS_IN_USEC(2500)); /* not accurate */ screen.set_size(640, 480); screen.set_visarea(0, 640-1, 0, 480-1); screen.set_screen_update(FUNC(mk90_state::screen_update)); screen.set_palette("palette"); PALETTE(config, "palette", palette_device::MONOCHROME); } /* 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(0)) ROM_SYSTEM_BIOS(1, "bas2", "Basic 2") ROMX_LOAD( "mk90ro20.bin", 0x8000, 0x8000, CRC(d8b3a5f5) SHA1(8f7ab2d97c7466392b6354c0ea7017531c2133ae), ROM_BIOS(1)) ROMX_LOAD( "mk90ro20t.bin", 0x4000, 0x4000, CRC(0f4b9434) SHA1(c74bbde6d201913c9e67ef8e2abe14b784187f8d), ROM_BIOS(1)) // Expansion ROM ROM_END /* Driver */ /* YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS */ COMP( 1988, mk90, 0, 0, mk90, mk90, mk90_state, empty_init, "Elektronika", "MK-90", MACHINE_NOT_WORKING | MACHINE_NO_SOUND | MACHINE_SUPPORTS_SAVE )