diff options
Diffstat (limited to 'src/mame/drivers/vta2000.c')
-rw-r--r-- | src/mame/drivers/vta2000.c | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/src/mame/drivers/vta2000.c b/src/mame/drivers/vta2000.c new file mode 100644 index 00000000000..4f64a6ab490 --- /dev/null +++ b/src/mame/drivers/vta2000.c @@ -0,0 +1,195 @@ +// license:BSD-3-Clause +// 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<UINT8> m_p_videoram; + DECLARE_PALETTE_INIT(vta2000); +private: + virtual void machine_reset(); + virtual void video_start(); + required_device<cpu_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, "<unknown>", "VTA-2000", MACHINE_NOT_WORKING | MACHINE_NO_SOUND ) |