// license:BSD-3-Clause // copyright-holders:Miodrag Milanovic, Jonathan Gevaryahu /*************************************************************************** DEC VT320 30/06/2009 Skeleton driver. ****************************************************************************/ #include "emu.h" #include "cpu/mcs51/mcs51.h" #include "machine/ram.h" #include "emupal.h" #include "screen.h" class vt320_state : public driver_device { public: vt320_state(const machine_config &mconfig, device_type type, const char *tag) : driver_device(mconfig, type, tag) , m_maincpu(*this, "maincpu") , m_ram(*this, RAM_TAG) { } void vt320(machine_config &config); private: virtual void machine_reset() override; virtual void video_start() override; uint32_t screen_update_vt320(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect); required_device m_maincpu; required_device m_ram; void vt320_io(address_map &map); void vt320_mem(address_map &map); }; /* Partlist : Siemens SAB8031A-16-P ROMless version of the 8051 microcontroller, running at 16 MHz. Motorola MC2681P Dual Universal Asynchronous Receiver/Transmitter (DUART), 40-pin package. Toshiba TC53512AP ROM, 512K bits = 64K bytes. 28-pin package. Toshiba TC5565APL-12, 2 off Static RAM, 64K bit = 8K byte. ST TDA1170N Vertical deflection system IC. UC 80343Q 20 pins. Unknown. UC 80068Q 20 pins. Unknown. Motorola SN74LS157NQST 16 pins. Quad 2-to-1 multiplexer. Microchip ER5911 8 pins. Serial EEPROM. 1K bits = 128 bytes. Texas Inst. 749X 75146 8 pins. Unknown. Signetics? 74LS373N 8-bit D-type latch. This has eight inputs and eight outputs. */ void vt320_state::vt320_mem(address_map &map) { map(0x0000, 0xffff).rom(); } void vt320_state::vt320_io(address_map &map) { } /* Input ports */ static INPUT_PORTS_START( vt320 ) INPUT_PORTS_END void vt320_state::machine_reset() { memset(m_ram->pointer(),0,16*1024); } void vt320_state::video_start() { } uint32_t vt320_state::screen_update_vt320(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) { return 0; } void vt320_state::vt320(machine_config &config) { /* basic machine hardware */ I8051(config, m_maincpu, XTAL(16'000'000)); m_maincpu->set_addrmap(AS_PROGRAM, &vt320_state::vt320_mem); m_maincpu->set_addrmap(AS_IO, &vt320_state::vt320_io); /* 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(vt320_state::screen_update_vt320)); screen.set_palette("palette"); PALETTE(config, "palette", palette_device::MONOCHROME); /* internal ram */ RAM(config, RAM_TAG).set_default_size("16K"); } /* ROM definition */ ROM_START( vt320 ) ROM_REGION( 0x10000, "maincpu", ROMREGION_ERASEFF ) ROM_DEFAULT_BIOS( "vt320" ) //DOL: http://web.archive.org/web/20060905115711/http://cmcnabb.cc.vt.edu/dec94mds/vt320dol.txt ROM_SYSTEM_BIOS( 0, "vt320v11", "VT320 V1.1" ) // 23-054E7 below can also appear (same contents?) as 23-048E7 which is a mask rom ROMX_LOAD( "23-054e7.e9", 0x0000, 0x10000, CRC(be98f9a4) SHA1(b8044d42ffaadb734fbd047fbca9c8aadeb0bf6c), ROM_BIOS(0) ) // EPROM ROM_SYSTEM_BIOS( 1, "vt320", "VT320 V1.2" ) ROMX_LOAD( "23-104e7.e9", 0x0000, 0x10000, CRC(5f419b5a) SHA1(dbc429b32d6baefd8a56862717d6e7fea1fb0c1c), ROM_BIOS(1) ) ROM_END ROM_START( vt330 ) ROM_REGION( 0x10000, "maincpu", ROMREGION_ERASEFF ) ROM_DEFAULT_BIOS( "vt330" ) ROM_SYSTEM_BIOS( 0, "vt330", "VT330" ) ROMX_LOAD( "23-236e6", 0x0000, 0x8000, CRC(38379339) SHA1(394e8511581abc796c8c612149eff280146b0ac8), ROM_BIOS(0) ) // 27256 EPROM ROM_END /* Driver */ /* YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS */ COMP( 1987, vt320, 0, 0, vt320, vt320, vt320_state, empty_init, "Digital Equipment Corporation", "VT320", MACHINE_IS_SKELETON ) COMP( 1987, vt330, 0, 0, vt320, vt320, vt320_state, empty_init, "Digital Equipment Corporation", "VT330", MACHINE_IS_SKELETON ) //COMP( 1989?, vt340, 0, 0, vt320, vt320, vt320_state, empty_init, "Digital Equipment Corporation", "VT340", MACHINE_IS_SKELETON ) //COMP( 1990?, vt340p, 0, 0, vt320, vt320, vt320_state, empty_init, "Digital Equipment Corporation", "VT340+", MACHINE_IS_SKELETON )