/* Ramtek M79 Ambush
The following chart explains the settings of the eight switches on
the DIP switch. A plus(+) in the column means the toggle switch is
up on the plus side of the DIP switch.
SWITCHES
| 12 | 345 | 678 |
------------------------------------------------|
Length of Game (seconds) | | | |
60 | 00 | | |
90 | 0+ | | |
90 | +0 | | |
120 | ++ | | |
-------------------------+------+-------+-------|
Points for Extended Time | | | |
1500 | | 000 | |
2500 | | +00 | |
3500 | | 0+0 | |
5000 | | ++0 | |
NO extended time | | +++ | |
-------------------------+------+-------+-------|
Coins Per Game | | | |
Free Play - two players | | | 0++ |
One Coin - two players | | | 0+0 |
One Coin - each player | | | 000 |
Two Coins - each player | | | +00 |
-------------------------------------------------
Based on extensive tests on location, the factory settings for the
most universal combinations are:
60 second long game
2500 points for extended play 12345678
One coin each player 00+00000
Ports:
In:
8000 DIP SW
8002 D0=VBlank
8004 Game Switch Inputs
8005 Game Switch Inputs
Out:
8000
8001 Mask Sel (Manual calls it "Select All RAM")
8002 Sound Control (According to Manual)
8003 D0=SelfTest LED
The cabinet has backdrop artwork, a lightbulb for explosions,
and two large (paddles pretending to be) guns.
*/
#include "emu.h"
#include "includes/m79amb.h"
#include "cpu/i8085/i8085.h"
class m79amb_state : public driver_device
{
public:
m79amb_state(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig, type, tag) { }
/* memory pointers */
UINT8 * m_videoram;
UINT8 * m_mask;
/* misc */
UINT8 m_lut_gun1[0x100];
UINT8 m_lut_gun2[0x100];
};
static WRITE8_HANDLER( ramtek_videoram_w )
{
m79amb_state *state = space->machine().driver_data<m79amb_state>();
state->m_videoram[offset] = data & ~*state->m_mask;
}
static SCREEN_UPDATE( ramtek )
{
m79amb_state *state = screen->machine().driver_data<m79amb_state>();
offs_t offs;
for (offs = 0; offs < 0x2000; offs++)
{
int i;
UINT8 data = state->m_videoram[offs];
int y = offs >> 5;
int x = (offs & 0x1f) << 3;
for (i = 0; i < 8; i++)
{
pen_t pen = (data & 0x80) ? RGB_WHITE : RGB_BLACK;
*BITMAP_ADDR32(bitmap, y, x) = pen;
x++;
data <<= 1;
}
}
return 0;
}
static READ8_HANDLER( gray5bit_controller0_r )
{
m79amb_state *state = space->machine().driver_data<m79amb_state>();
UINT8 port_data = input_port_read(space->machine(), "8004");
UINT8 gun_pos = input_port_read(space->machine(), "GUN1");
return (port_data & 0xe0) | state->m_lut_gun1[gun_pos];
}
static READ8_HANDLER( gray5bit_controller1_r )
{
m79amb_state *state = space->machine().driver_data<m79amb_state>();
UINT8 port_data = input_port_read(space->machine(), "8005");
UINT8 gun_pos = input_port_read(space->machine(), "GUN2");
return (port_data & 0xe0) | state->m_lut_gun2[gun_pos];
}
static WRITE8_HANDLER( m79amb_8002_w )
{
/* D1 may also be watchdog reset */
/* port goes to 0x7f to turn on explosion lamp */
output_set_value("EXP_LAMP", data ? 1 : 0);
}
static ADDRESS_MAP_START( main_map, AS_PROGRAM, 8 )
AM_RANGE(0x0000, 0x1fff) AM_ROM
AM_RANGE(0x4000, 0x5fff) AM_RAM_WRITE(ramtek_videoram_w) AM_BASE_MEMBER(m79amb_state, m_videoram)
AM_RANGE(0x6000, 0x63ff) AM_RAM /* ?? */
AM_RANGE(0x8000, 0x8000) AM_READ_PORT("8000") AM_DEVWRITE("discrete", m79amb_8000_w)
AM_RANGE(0x8001, 0x8001) AM_WRITEONLY AM_BASE_MEMBER(m79amb_state, m_mask)
AM_RANGE(0x8002, 0x8002) AM_READ_PORT("8002") AM_WRITE(m79amb_8002_w)
AM_RANGE(0x8003, 0x8003) AM_DEVWRITE("discrete", m79amb_8003_w)
AM_RANGE(0x8004, 0x8004) AM_READ(gray5bit_controller0_r)
AM_RANGE(0x8005, 0x8005) AM_READ(gray5bit_controller1_r)
AM_RANGE(0xc000, 0xc07f) AM_RAM /* ?? */
AM_RANGE(0xc200, 0xc27f) AM_RAM /* ?? */
ADDRESS_MAP_END
static INPUT_PORTS_START( m79amb )
PORT_START("8000")
PORT_DIPNAME( 0x03, 0x00, "Play Time" )
PORT_DIPSETTING( 0x00, "60 Seconds" )
PORT_DIPSETTING( 0x01, "90 Seconds" )
PORT_DIPSETTING( 0x02, "90 Seconds" )
PORT_DIPSETTING( 0x03, "120 Seconds" )
PORT_DIPNAME( 0x1c, 0x04, "Points for Extended Time" )
PORT_DIPSETTING( 0x00, "1500" )
PORT_DIPSETTING( 0x04, "2500" )
PORT_DIPSETTING( 0x08, "3500" )
PORT_DIPSETTING( 0x0c, "5000" )
PORT_DIPSETTING( 0x1c, "No Extended Time" )
PORT_DIPNAME( 0xe0, 0x00, DEF_STR( Coinage ))
PORT_DIPSETTING( 0x20, DEF_STR( 2C_1C ))
PORT_DIPSETTING( 0x00, DEF_STR( 1C_1C ))
PORT_DIPSETTING( 0x40, DEF_STR( 1C_2C ))
PORT_DIPSETTING( 0xc0, DEF_STR( Free_Play ))
PORT_START("8002")
PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_VBLANK )
PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_START1 )
PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_COIN1 )
PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_TILT )
PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_UNUSED )
PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_UNUSED )
PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_UNUSED )
PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNUSED )
PORT_START("8004")
PORT_BIT( 0x1f, IP_ACTIVE_LOW, IPT_UNUSED ) // gun 1 here
PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON1 )
PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_UNKNOWN )
PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNKNOWN )
PORT_START("8005")
PORT_BIT( 0x1f, IP_ACTIVE_LOW, IPT_UNUSED ) // gun 2 here
PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_PLAYER(2)
PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_UNKNOWN )
PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNKNOWN )
// fake ports for the guns
PORT_START("GUN1")
PORT_BIT( 0xff, 0x80, IPT_PADDLE ) PORT_CROSSHAIR(X, (1.0-(19.0/256.0)), 19.0/256.0, 30.0/224.0) PORT_MINMAX(19,255) PORT_SENSITIVITY(50) PORT_KEYDELTA(5) PORT_CENTERDELTA(0) PORT_PLAYER(1)
PORT_START("GUN2")
PORT_BIT( 0xff, 0x80, IPT_PADDLE ) PORT_CROSSHAIR(X, (1.0-(22.0/256.0)), 0.0, 30.0/224.0) PORT_MINMAX(0,234) PORT_SENSITIVITY(50) PORT_KEYDELTA(5) PORT_CENTERDELTA(0) PORT_PLAYER(2)
INPUT_PORTS_END
static INTERRUPT_GEN( m79amb_interrupt )
{
device_set_input_line_and_vector(device, 0, HOLD_LINE, 0xcf); /* RST 08h */
}
static MACHINE_CONFIG_START( m79amb, m79amb_state )
/* basic machine hardware */
MCFG_CPU_ADD("maincpu", I8080, XTAL_19_6608MHz / 10)
MCFG_CPU_PROGRAM_MAP(main_map)
MCFG_CPU_VBLANK_INT("screen", m79amb_interrupt)
/* video hardware */
MCFG_SCREEN_ADD("screen", RASTER)
MCFG_SCREEN_REFRESH_RATE(60)
MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500) /* not accurate */)
MCFG_SCREEN_FORMAT(BITMAP_FORMAT_RGB32)
MCFG_SCREEN_SIZE(32*8, 32*8)
MCFG_SCREEN_VISIBLE_AREA(0*8, 32*8-1, 4*8, 32*8-1)
MCFG_SCREEN_UPDATE(ramtek)
/* sound hardware */
MCFG_SPEAKER_STANDARD_MONO("mono")
MCFG_SOUND_ADD("discrete", DISCRETE, 0)
MCFG_SOUND_CONFIG_DISCRETE(m79amb)
MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.0)
MACHINE_CONFIG_END
ROM_START( m79amb )
ROM_REGION( 0x10000, "maincpu", 0 )
ROM_LOAD( "m79.10t", 0x0000, 0x0200, CRC(ccf30b1e) SHA1(c1a77f8dc81c491928f81121ca5c9b7f8753794f) )
ROM_LOAD( "m79.9t", 0x0200, 0x0200, CRC(daf807dd) SHA1(16cd9d553bfb111c8380966cbde39dbddd5fe58c) )
ROM_LOAD( "m79.8t", 0x0400, 0x0200, CRC(79fafa02) SHA1(440620f5be44febdd7c64014739dc71fb570cc92) )
ROM_LOAD( "m79.7t", 0x0600, 0x0200, CRC(06f511f8) SHA1(a8dcaec0723b8ac9ad9474e3e931a23d7aa4ec23) )
ROM_LOAD( "m79.6t", 0x0800, 0x0200, CRC(24634390) SHA1(bc5f2ae5a49904dde1bd5e6b134571bf1d912735) )
ROM_LOAD( "m79.5t", 0x0a00, 0x0200, CRC(95252aa6) SHA1(e7ea598f864510557b511682a5d2223a512ff029) )
ROM_LOAD( "m79.4t", 0x0c00, 0x0200, CRC(54cffb0f) SHA1(4a4ad921ef6324c927a2e4a9da624d8096b6d87b) )
ROM_LOAD( "m79.3ta", 0x0e00, 0x0200, CRC(27db5ede) SHA1(890587181497ed6e1d45ed501790a6d4d3315f00) )
ROM_LOAD( "m79.10u", 0x1000, 0x0200, CRC(e41d13d2) SHA1(cc2911f46a0465305e4c7bc08f55acd065f93534) )
ROM_LOAD( "m79.9u", 0x1200, 0x0200, CRC(e35f5616) SHA1(394ad92ad7dd233ece17335cf20aef8861b41508) )
ROM_LOAD( "m79.8u", 0x1400, 0x0200, CRC(14eafd7c) SHA1(ca2d17f6ae1c3ff461a1b2bc6f37622e70cdaae8) )
ROM_LOAD( "m79.7u", 0x1600, 0x0200, CRC(b9864f25) SHA1(9330cf96b7bce13e0ee3ad746b00e82ef10c3989) )
ROM_LOAD( "m79.6u", 0x1800, 0x0200, CRC(dd25197f) SHA1(13eaf40251de82e817f488a9de738aadd8f6715e) )
ROM_LOAD( "m79.5u", 0x1a00, 0x0200, CRC(251545e2) SHA1(05a0d5e8f143ea376fb3c517cf5e9d0d3534b933) )
ROM_LOAD( "m79.4u", 0x1c00, 0x0200, CRC(b5f55c75) SHA1(f478cde73ae961be7b58c769f035eef58fd45555) )
ROM_LOAD( "m79.3u", 0x1e00, 0x0200, CRC(e968691a) SHA1(7024d10f2af195fc4050861706b1f3d22cb22a9c) )
ROM_END
/* grenade trajectory per gun position is inconsistent and sloppy in the game:
0, 1, 3, 2, 6, 7, 5, 4 - gun position
90.00, 90.00, 90.00, 90.00, 86.42, 86.42, 86.42, 86.42 - grenade trajectory (angle, est)
18.0, 18.0, 18.0, 18.0, 27.2, 27.2, 27.2, 31.2 - crosses with y=28 (x, est)
12, 13, 15, 14, 10, 11, 9, 8,
84.39, 84.39, 84.39, 80.87, 79.00, 80.87, 79.00, 79.00
41.9, 48.9, 56.8, 75.8, 87.2, 88.8, 101.6, 107.6
24, 25, 27, 26, 30, 31, 29, 28,
79.00, 79.00, 75.59, 75.59, 75.59, 73.72, 73.72, 73.72
114.1, 121.5, 138.8, 146.0, 152.7, 162.6, 167.6, 172.7
20, 21, 23, 22, 18, 19, 17, 16
73.72, 70.08, 70.08, 70.08, 67.97, 67.97, 64.34, 64.34
181.6, 199.9, 205.4, 211.9, 223.5, 232.4, 254.0, 254.0
*/
static const UINT8 lut_cross[0x20] = {
19, 20, 21, 23, 25, 27, 29, 37,
45, 53, 66, 82, 88, 95, 105, 111,
118, 130, 142, 149, 158, 165, 170, 177,
191, 203, 209, 218, 228, 243, 249, 255,
};
static const UINT8 lut_pos[0x20] = {
0x1f, 0x1e, 0x1c, 0x1d, 0x19, 0x18, 0x1a, 0x1b,
0x13, 0x12, 0x10, 0x11, 0x15, 0x14, 0x16, 0x17,
0x07, 0x06, 0x04, 0x05, 0x01, 0x00, 0x02, 0x03,
0x0b, 0x0a, 0x08, 0x09, 0x0d, 0x0c, 0x0e, 0x0f
};
static DRIVER_INIT( m79amb )
{
m79amb_state *state = machine.driver_data<m79amb_state>();
UINT8 *rom = machine.region("maincpu")->base();
int i, j;
/* PROM data is active low */
for (i = 0; i < 0x2000; i++)
rom[i] = ~rom[i];
/* gun positions */
for (i = 0; i < 0x100; i++)
{
/* gun 1, start at left 18 */
for (j = 0; j < 0x20; j++)
{
if (i <= lut_cross[j])
{
state->m_lut_gun1[i] = lut_pos[j];
break;
}
}
/* gun 2, start at right 235 */
for (j = 0; j < 0x20; j++)
{
if (i >= (253 - lut_cross[j]))
{
state->m_lut_gun2[i] = lut_pos[j];
break;
}
}
}
}
GAME( 1977, m79amb, 0, m79amb, m79amb, m79amb, ROT0, "RamTek", "M-79 Ambush", GAME_IMPERFECT_SOUND | GAME_SUPPORTS_SAVE )