/*************************************************************************** DEC VT220 30/06/2009 Skeleton driver. ****************************************************************************/ #include "emu.h" #include "cpu/mcs51/mcs51.h" #include "machine/ram.h" class vt220_state : public driver_device { public: vt220_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) { } virtual void machine_reset(); virtual void video_start(); UINT32 screen_update_vt220(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect); required_device m_maincpu; required_device m_ram; }; static ADDRESS_MAP_START(vt220_mem, AS_PROGRAM, 8, vt220_state) AM_RANGE(0x0000, 0x7fff) AM_ROM ADDRESS_MAP_END static ADDRESS_MAP_START(vt220_io, AS_IO, 8, vt220_state) ADDRESS_MAP_END /* Input ports */ static INPUT_PORTS_START( vt220 ) INPUT_PORTS_END void vt220_state::machine_reset() { memset(m_ram->pointer(),0,16*1024); } void vt220_state::video_start() { } UINT32 vt220_state::screen_update_vt220(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) { return 0; } static MACHINE_CONFIG_START( vt220, vt220_state ) /* basic machine hardware */ MCFG_CPU_ADD("maincpu", I8051, XTAL_16MHz) MCFG_CPU_PROGRAM_MAP(vt220_mem) MCFG_CPU_IO_MAP(vt220_io) /* 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(vt220_state, screen_update_vt220) MCFG_SCREEN_PALETTE("palette") MCFG_PALETTE_ADD_BLACK_AND_WHITE("palette") /* internal ram */ MCFG_RAM_ADD(RAM_TAG) MCFG_RAM_DEFAULT_SIZE("16K") MACHINE_CONFIG_END /* ROM definition */ ROM_START( vt220 ) ROM_REGION( 0x10000, "maincpu", ROMREGION_ERASEFF ) ROM_LOAD( "23-178e6.bin", 0x0000, 0x8000, CRC(cce5088c) SHA1(4638304729d1213658a96bb22c5211322b74d8fc)) ROM_END /* Driver */ /* YEAR NAME PARENT COMPAT MACHINE INPUT INIT COMPANY FULLNAME FLAGS */ COMP( 1983, vt220, 0, 0, vt220, vt220, driver_device, 0, "Digital Equipment Corporation", "VT220", GAME_NOT_WORKING | GAME_NO_SOUND)