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// license:BSD-3-Clause
// copyright-holders:Robbbert
/****************************************************************************************
2018-09-15
Video 21 blackjack game. Thanks to hap who figured out the inputs and the name of the game.
VIDEO-GAMES - LICH/GERMANY 1017a
NEC D8080AFC (i8080), unknown xtal, bank of 7 dips. 10x 4-bit proms, type F93453 (=82S137)
Video Ram = 7 x 2102 (bit 7 omitted). Main Ram = 2x MCM145101 (=M5101L).
The game has sound (there's a LM380N visible), looks like there's a bunch of TTL chips
involved, and a 555.
To Do:
- Sound
- CPU clock
- unknown status bits? eg. hopper
- color overlay as seen on flyer upright cabinet
- no lamp for 'Deal' is this correct?
When booted, press Key out (mapped to W by default) to get it going.
*******************************************************************************************/
#include "emu.h"
#include "cpu/i8085/i8085.h"
#include "machine/nvram.h"
#include "screen.h"
#include "emupal.h"
#include "video21.lh"
class video21_state : public driver_device
{
public:
video21_state(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig, type, tag)
, m_maincpu(*this,"maincpu")
, m_p_videoram(*this, "videoram")
, m_p_chargen(*this, "chargen")
, m_lamps(*this, "lamp%u", 0U)
{ }
void video21(machine_config &config);
protected:
virtual void machine_start() override;
private:
DECLARE_WRITE8_MEMBER(unk_w);
DECLARE_WRITE8_MEMBER(lamp1_w);
DECLARE_WRITE8_MEMBER(lamp2_w);
void clear_lamps(device_t &device);
uint32_t screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
void mem_map(address_map &map);
void io_map(address_map &map);
required_device<cpu_device> m_maincpu;
required_shared_ptr<u8> m_p_videoram;
required_region_ptr<u8> m_p_chargen;
int m_offcounter;
output_finder<24> m_lamps;
};
uint32_t video21_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
uint8_t y,ra,chr,gfx;
uint16_t sy=0,ma=0,x;
for (y = 0; y < 28; y++)
{
for (ra = 0; ra < 8; ra++)
{
uint16_t *p = &bitmap.pix16(sy++);
for (x = 0; x < 32; x++)
{
chr = m_p_videoram[x+ma] & 0x7f;
gfx = m_p_chargen[(chr<<3) | ra ];
/* Display a scanline of a character */
*p++ = BIT(gfx, 7);
*p++ = BIT(gfx, 6);
*p++ = BIT(gfx, 5);
*p++ = BIT(gfx, 4);
*p++ = BIT(gfx, 3);
*p++ = BIT(gfx, 2);
*p++ = BIT(gfx, 1);
*p++ = BIT(gfx, 0);
}
}
ma+=32;
}
return 0;
}
WRITE8_MEMBER(video21_state::unk_w)
{
// doesn't appear to be lamps
logerror("%s: unk_w %02x\n", machine().describe_context(), data);
}
WRITE8_MEMBER(video21_state::lamp1_w)
{
for (int i = 0; i < 8; i++)
{
m_lamps[i+0] = BIT(data, 7-i);
}
m_offcounter = 8;
}
WRITE8_MEMBER(video21_state::lamp2_w)
{
for (int i = 0; i < 8; i++)
{
m_lamps[i+8] = BIT(data, 7-i);
}
m_offcounter = 8;
}
void video21_state::clear_lamps(device_t &device)
{
// the game stops writing the lamp values in certain situations and expects the lamps to turn off automatically (decay?)
// eg. if you select 'take' in the 'take' or 'stand' choice
if (m_offcounter > 0)
m_offcounter--;
if (m_offcounter == 0)
{
for (int i = 0; i < 16; i++)
{
m_lamps[i] = 0;
}
}
}
void video21_state::mem_map(address_map &map) {
map(0x0000,0x0fff).rom().mirror(0x3000);
map(0xe000,0xe3ff).ram().share("videoram");
map(0xff00,0xffff).ram().share("nvram");
}
void video21_state::io_map(address_map &map) {
map(0x02,0x02).w(FUNC(video21_state::unk_w)); // lots of unknown writes, might be some kind of dac
map(0x04,0x04).w(FUNC(video21_state::lamp1_w));
map(0x08,0x08).w(FUNC(video21_state::lamp2_w));
map(0x41,0x41).portr("IN41");
map(0x42,0x42).portr("IN42");
map(0x44,0x44).portr("IN44");
}
static INPUT_PORTS_START( video21 )
PORT_START("IN41") // dips and tilt
PORT_DIPNAME( 0x01, 0x01, "41b0" )
PORT_DIPSETTING( 0x01, DEF_STR( Off ) )
PORT_DIPSETTING( 0x00, DEF_STR( On ) )
PORT_DIPNAME( 0x02, 0x02, "41b1" )
PORT_DIPSETTING( 0x02, DEF_STR( Off ) )
PORT_DIPSETTING( 0x00, DEF_STR( On ) )
PORT_DIPNAME( 0x04, 0x04, "41b2" )
PORT_DIPSETTING( 0x04, DEF_STR( Off ) )
PORT_DIPSETTING( 0x00, DEF_STR( On ) )
PORT_DIPNAME( 0x08, 0x08, "41b3" )
PORT_DIPSETTING( 0x08, DEF_STR( Off ) )
PORT_DIPSETTING( 0x00, DEF_STR( On ) )
PORT_DIPNAME( 0x10, 0x10, "41b4" )
PORT_DIPSETTING( 0x10, DEF_STR( Off ) )
PORT_DIPSETTING( 0x00, DEF_STR( On ) )
PORT_DIPNAME( 0x20, 0x20, DEF_STR( Coin_B ) )
PORT_DIPSETTING( 0x20, "1 Coin/10 Credits" )
PORT_DIPSETTING( 0x00, DEF_STR( 1C_2C ) )
PORT_DIPNAME( 0x40, 0x40, DEF_STR( Coin_A ) )
PORT_DIPSETTING( 0x40, DEF_STR( 1C_5C ) )
PORT_DIPSETTING( 0x00, DEF_STR( 1C_1C ) )
PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_TILT )
PORT_START("IN42")
PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_COIN1 ) PORT_IMPULSE(2)
PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_COIN2 ) PORT_IMPULSE(2)
PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_START1 )
PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_GAMBLE_TAKE )
PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_GAMBLE_STAND )
PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_GAMBLE_KEYOUT )
PORT_DIPNAME( 0x40, 0x40, "42b6" )
PORT_DIPSETTING( 0x40, DEF_STR( Off ) )
PORT_DIPSETTING( 0x00, DEF_STR( On ) )
PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_GAMBLE_DEAL )
PORT_START("IN44")
PORT_DIPNAME( 0x01, 0x01, "44b0" )
PORT_DIPSETTING( 0x01, DEF_STR( Off ) )
PORT_DIPSETTING( 0x00, DEF_STR( On ) )
PORT_DIPNAME( 0x02, 0x02, "44b1" )
PORT_DIPSETTING( 0x02, DEF_STR( Off ) )
PORT_DIPSETTING( 0x00, DEF_STR( On ) )
PORT_DIPNAME( 0x04, 0x04, "44b2" )
PORT_DIPSETTING( 0x04, DEF_STR( Off ) )
PORT_DIPSETTING( 0x00, DEF_STR( On ) )
PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_GAMBLE_BOOK )
PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_GAMBLE_BET )
PORT_DIPNAME( 0x20, 0x20, "44b5" )
PORT_DIPSETTING( 0x20, DEF_STR( Off ) )
PORT_DIPSETTING( 0x00, DEF_STR( On ) )
PORT_DIPNAME( 0x40, 0x40, "44b6" )
PORT_DIPSETTING( 0x40, DEF_STR( Off ) )
PORT_DIPSETTING( 0x00, DEF_STR( On ) )
PORT_DIPNAME( 0x80, 0x80, "Max Bet" )
PORT_DIPSETTING( 0x80, "10" )
PORT_DIPSETTING( 0x00, "2" )
INPUT_PORTS_END
static const gfx_layout video21_charlayout =
{
8, 8, // 8 x 8 characters
128, // 128 characters, but only the first 76 look useful
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 /* every char takes 8 bytes */
};
static GFXDECODE_START( gfx_video21 )
GFXDECODE_ENTRY( "chargen", 0x0000, video21_charlayout, 0, 1 )
GFXDECODE_END
void video21_state::machine_start()
{
m_lamps.resolve();
}
void video21_state::video21(machine_config &config)
{
/* basic machine hardware */
I8080A(config, m_maincpu, 20.79_MHz_XTAL / 10); // crystal confirmed but divisor unknown (divider appears to be 74LS160)
m_maincpu->set_addrmap(AS_PROGRAM, &video21_state::mem_map);
m_maincpu->set_addrmap(AS_IO, &video21_state::io_map);
m_maincpu->set_periodic_int(FUNC(video21_state::clear_lamps), attotime::from_hz(240));
NVRAM(config, "nvram", nvram_device::DEFAULT_ALL_0);
/* video hardware */
screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER));
screen.set_color(rgb_t::white());
screen.set_raw(20.79_MHz_XTAL / 4, 330, 0, 32*8, 315, 0, 28*8); // parameters guessed
screen.set_screen_update(FUNC(video21_state::screen_update));
screen.set_palette("palette");
GFXDECODE(config, "gfxdecode", "palette", gfx_video21);
PALETTE(config, "palette", 2).set_init("palette", FUNC(palette_device::palette_init_monochrome));
/* sound hardware */
}
ROM_START( video21 )
ROM_REGION( 0x1000, "maincpu", 0 )
ROM_LOAD_NIB_HIGH( "lich_prg.02", 0x0000, 0x0400, CRC(05585e39) SHA1(7eefb5d63b4499a303ecdcad6af5df9fe9c89205) )
ROM_LOAD_NIB_LOW ( "lich_prg.03", 0x0000, 0x0400, CRC(b9134e96) SHA1(e7a8ff71f735add608d3c9dcc287ca37414debcb) )
ROM_LOAD_NIB_HIGH( "lich_prg.04", 0x0400, 0x0400, CRC(8a6aa143) SHA1(16973106a95b17d8c4712db8aa7ef564751ae6d4) )
ROM_LOAD_NIB_LOW ( "lich_prg.05", 0x0400, 0x0400, CRC(98c07d4d) SHA1(d3126b5484c67ecc7c44ddc25b48ff72ed8a734f) )
ROM_LOAD_NIB_HIGH( "lich_prg.76", 0x0800, 0x0400, CRC(737c27f5) SHA1(55c7eb29b979d35633e5fb2c1c1ac3117901a0f0) )
ROM_LOAD_NIB_LOW ( "lich_prg.78", 0x0800, 0x0400, CRC(c1081a2f) SHA1(24dc1d9afa4635c3114369c338903343a8b81d1a) )
ROM_LOAD_NIB_HIGH( "lich_prg.77", 0x0c00, 0x0400, CRC(3a725b98) SHA1(efa3802025f1f99b45e56abd85dc3d1860d4734d) )
ROM_LOAD_NIB_LOW ( "lich_prg.79", 0x0c00, 0x0400, CRC(044d1bfd) SHA1(5a57c1ab7eb7dd7ed05852e128b704c3b37a87b8) )
ROM_REGION( 0x0400, "chargen", 0 )
ROM_LOAD_NIB_HIGH( "lich_gfx.29", 0x0000, 0x0400, CRC(2b70870d) SHA1(1f50a6976e1634020c78f10c1259e38f5e010a86) )
ROM_LOAD_NIB_LOW ( "lich_gfx.43", 0x0000, 0x0400, CRC(0ecb0aab) SHA1(7f3f1b93a5d38828ae3e97e5f8ef1a6a96dc798b) )
ROM_END
GAMEL(1980, video21, 0, video21, video21, video21_state, empty_init, ROT0, "Video Games GmbH", "Video 21", MACHINE_NO_SOUND, layout_video21)
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