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/***************************************************************************
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.
****************************************************************************/
#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_maincpu(*this, "maincpu")
{ }
required_device<cpu_device> m_maincpu;
const UINT8 *m_p_chargen;
const UINT8 *m_p_videoram;
virtual void machine_reset();
virtual void video_start();
virtual void palette_init();
UINT32 screen_update_vta2000(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
};
static ADDRESS_MAP_START(vta2000_mem, AS_PROGRAM, 8, vta2000_state)
ADDRESS_MAP_UNMAP_HIGH
AM_RANGE( 0x0000, 0x5fff ) AM_ROM
AM_RANGE( 0x8000, 0xffff ) AM_RAM AM_REGION("maincpu", 0x8000)
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 = machine().root_device().memregion("chargen")->base();
m_p_videoram = memregion("maincpu")->base()+0x8000;
}
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
void vta2000_state::palette_init()
{
palette_set_color(machine(), 0, RGB_BLACK); // black
palette_set_color_rgb(machine(), 1, 0x00, 0xc0, 0x00); // green
palette_set_color_rgb(machine(), 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_PALETTE_LENGTH(3)
MCFG_GFXDECODE(vta2000)
MACHINE_CONFIG_END
/* ROM definition */
ROM_START( vta2000 )
ROM_REGION( 0x10000, "maincpu", ROMREGION_ERASEFF )
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( ????, vta2000, 0, 0, vta2000, vta2000, driver_device, 0, "<unknown>", "VTA-2000", GAME_NOT_WORKING | GAME_NO_SOUND)
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