// license:MAME // copyright-holders:Robbbert /*************************************************************************** VTA-2000 Terminal board images : http://fotki.yandex.ru/users/lodedome/album/93699?p=0 BDP-15 board only 29/11/2010 Skeleton driver. Better known on the net as BTA2000-15m. It is a green-screen terminal, using RS232, and supposedly VT100 compatible. The top line is a status line. Note: port 0 bit 4 is NOT a speaker bit. See code at 027B. ****************************************************************************/ #include "emu.h" #include "cpu/i8085/i8085.h" class vta2000_state : public driver_device { public: vta2000_state(const machine_config &mconfig, device_type type, const char *tag) : driver_device(mconfig, type, tag) , m_p_videoram(*this, "videoram") , m_maincpu(*this, "maincpu") { } const UINT8 *m_p_chargen; UINT32 screen_update_vta2000(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect); required_shared_ptr m_p_videoram; DECLARE_PALETTE_INIT(vta2000); private: virtual void machine_reset(); virtual void video_start(); required_device m_maincpu; }; static ADDRESS_MAP_START(vta2000_mem, AS_PROGRAM, 8, vta2000_state) ADDRESS_MAP_UNMAP_HIGH AM_RANGE( 0x0000, 0x5fff ) AM_ROM AM_REGION("roms", 0) AM_RANGE( 0x8000, 0xc7ff ) AM_RAM AM_SHARE("videoram") AM_RANGE( 0xc800, 0xc8ff ) AM_ROM AM_REGION("roms", 0x5000) ADDRESS_MAP_END static ADDRESS_MAP_START(vta2000_io, AS_IO, 8, vta2000_state) ADDRESS_MAP_GLOBAL_MASK(0xff) ADDRESS_MAP_UNMAP_HIGH ADDRESS_MAP_END /* Input ports */ static INPUT_PORTS_START( vta2000 ) INPUT_PORTS_END void vta2000_state::machine_reset() { } void vta2000_state::video_start() { m_p_chargen = memregion("chargen")->base(); } UINT32 vta2000_state::screen_update_vta2000(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) /* Cursor is missing. */ { static UINT8 framecnt=0; UINT8 y,ra,gfx,attr,fg,bg; UINT16 sy=0,ma=0,x,xx=0,chr; framecnt++; for (y = 0; y < 25; y++) { for (ra = 0; ra < 12; ra++) { UINT16 *p = &bitmap.pix16(sy++); xx = ma << 1; for (x = ma; x < ma + 80; x++) { chr = m_p_videoram[xx++]; attr = m_p_videoram[xx++]; if ((chr & 0x60)==0x60) chr+=256; gfx = m_p_chargen[(chr<<4) | ra ]; bg = 0; /* Process attributes */ if (BIT(attr, 4)) { gfx ^= 0xff; // reverse video bg = 2; } if (BIT(attr, 0)) fg = 2; // highlight else fg = 1; if ((BIT(attr, 1)) && (BIT(framecnt, 5))) gfx = 0; // blink if ((BIT(attr, 5)) && (ra == 10)) { gfx = 0xff; // underline fg = 2; } /* Display a scanline of a character */ *p++ = BIT(gfx, 7) ? fg : bg; *p++ = BIT(gfx, 6) ? fg : bg; *p++ = BIT(gfx, 5) ? fg : bg; *p++ = BIT(gfx, 4) ? fg : bg; *p++ = BIT(gfx, 3) ? fg : bg; *p++ = BIT(gfx, 2) ? fg : bg; *p++ = BIT(gfx, 1) ? fg : bg; *p++ = BIT(gfx, 0) ? fg : bg; } } if (y) ma+=132; else ma+=80; } return 0; } /* F4 Character Displayer */ static const gfx_layout vta2000_charlayout = { 8, 16, /* 8 x 16 characters */ 512, /* 128 characters */ 1, /* 1 bits per pixel */ { 0 }, /* no bitplanes */ /* x offsets */ { 0, 1, 2, 3, 4, 5, 6, 7 }, /* y offsets */ { 0*8, 1*8, 2*8, 3*8, 4*8, 5*8, 6*8, 7*8, 8*8, 9*8, 10*8, 11*8, 12*8, 13*8, 14*8, 15*8 }, 8*16 /* every char takes 16 bytes */ }; static GFXDECODE_START( vta2000 ) GFXDECODE_ENTRY( "chargen", 0x0000, vta2000_charlayout, 0, 1 ) GFXDECODE_END PALETTE_INIT_MEMBER(vta2000_state, vta2000) { palette.set_pen_color(0, rgb_t::black); // black palette.set_pen_color(1, 0x00, 0xc0, 0x00); // green palette.set_pen_color(2, 0x00, 0xff, 0x00); // highlight } static MACHINE_CONFIG_START( vta2000, vta2000_state ) /* basic machine hardware */ MCFG_CPU_ADD("maincpu",I8080, XTAL_4MHz / 4) MCFG_CPU_PROGRAM_MAP(vta2000_mem) MCFG_CPU_IO_MAP(vta2000_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(80*8, 25*12) MCFG_SCREEN_VISIBLE_AREA(0, 80*8-1, 0, 25*12-1) MCFG_SCREEN_UPDATE_DRIVER(vta2000_state, screen_update_vta2000) MCFG_SCREEN_PALETTE("palette") MCFG_PALETTE_ADD("palette", 3) MCFG_PALETTE_INIT_OWNER(vta2000_state, vta2000) MCFG_GFXDECODE_ADD("gfxdecode", "palette", vta2000) MACHINE_CONFIG_END /* ROM definition */ ROM_START( vta2000 ) ROM_REGION( 0x6000, "roms", 0 ) ROM_LOAD( "bdp-15_11.rom", 0x4000, 0x2000, CRC(d4abe3e9) SHA1(ab1973306e263b0f66f2e1ede50cb5230f8d69d5) ) ROM_LOAD( "bdp-15_12.rom", 0x2000, 0x2000, CRC(4a5fe332) SHA1(f1401c26687236184fec0558cc890e796d7d5c77) ) ROM_LOAD( "bdp-15_13.rom", 0x0000, 0x2000, CRC(b6b89d90) SHA1(0356d7ba77013b8a79986689fb22ef4107ef885b) ) ROM_REGION(0x2000, "chargen", ROMREGION_INVERT ) ROM_LOAD( "bdp-15_14.rom", 0x0000, 0x2000, CRC(a1dc4f8e) SHA1(873fd211f44713b713d73163de2d8b5db83d2143) ) ROM_END /* Driver */ /* YEAR NAME PARENT COMPAT MACHINE INPUT INIT COMPANY FULLNAME FLAGS */ COMP( 19??, vta2000, 0, 0, vta2000, vta2000, driver_device, 0, "", "VTA-2000", GAME_NOT_WORKING | GAME_NO_SOUND )