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|
// license:BSD-3-Clause
// copyright-holders:Frank Palazzolo
/****************************************************************************
Sega "Space Tactics" Driver
Frank Palazzolo (palazzol@home.com)
Master processor - Intel 8080A
Memory Map:
0000-2fff ROM R
4000-47ff RAM R/W
5000-5fff switches/status R
6000-6fff dips sw R
6000-600f Coin rjct/palette select W
6010-601f sound triggers W
6020-602f lamp latch W
6030-603f speed latch W
6040-605f shot related W
6060-606f score display W
60a0-60e0 sound triggers2 W
7000-7fff RNG/swit R LS Nibble are a VBlank counter
used as a RNG
8000-8fff swit/stat R
8000-8fff offset RAM W
9000-9fff V pos reg. R Reads counter from an encoder wheel
a000-afff H pos reg. R Reads counter from an encoder wheel
b000-bfff VRAM B R/W alphanumerics, bases, barrier,
enemy bombs
d000-dfff VRAM D R/W furthest aliens (scrolling)
e000-efff VRAM E R/W middle aliens (scrolling)
f000-ffff VRAM F R/W closest aliens (scrolling)
--------------------------------------------------------------------
At this time, emulation is missing:
Sound (all discrete and a 76477)
Verify Color PROM resistor values (Last 8 colors)
****************************************************************************/
#include "emu.h"
#include "includes/stactics.h"
#include "stactics.lh"
#include "cpu/i8085/i8085.h"
/*************************************
*
* Mirror motor handling
*
*************************************/
WRITE_LINE_MEMBER(stactics_state::motor_w)
{
m_motor_on = state;
}
READ_LINE_MEMBER(stactics_state::motor_not_ready_r)
{
// if the motor is self-centering, but not centered yet
return (!m_motor_on && (m_horiz_pos != 0 || m_vert_pos != 0));
}
uint8_t stactics_state::vert_pos_r()
{
return 0x70 - m_vert_pos;
}
uint8_t stactics_state::horiz_pos_r()
{
return m_horiz_pos + 0x88;
}
void stactics_state::move_motor()
{
// monitor motor under joystick control
if (m_motor_on)
{
const int in3 = m_in3->read();
const int in4 = m_fake->read();
/* up */
if (!(in4 & 0x01) && m_vert_pos > -128)
m_vert_pos--;
/* down */
if (!(in4 & 0x02) && m_vert_pos < 127)
m_vert_pos++;
/* left */
if (!(in3 & 0x20) && m_horiz_pos < 127)
m_horiz_pos++;
/* right */
if (!(in3 & 0x40) && m_horiz_pos > -128)
m_horiz_pos--;
}
/* monitor motor under self-centering control */
else
{
if (m_horiz_pos > 0)
m_horiz_pos--;
else if (m_horiz_pos < 0)
m_horiz_pos++;
if (m_vert_pos > 0)
m_vert_pos--;
else if (m_vert_pos < 0)
m_vert_pos++;
}
}
/*************************************
*
* Random number generator
*
*************************************/
CUSTOM_INPUT_MEMBER(stactics_state::get_rng)
{
/* this is a 555 timer, but cannot read one of the resistor values */
return machine().rand() & 0x07;
}
/*************************************
*
* Coin lockout
*
*************************************/
WRITE_LINE_MEMBER(stactics_state::coin_lockout_1_w)
{
machine().bookkeeping().coin_lockout_w(0, !state);
}
WRITE_LINE_MEMBER(stactics_state::coin_lockout_2_w)
{
machine().bookkeeping().coin_lockout_w(1, !state);
}
/*************************************
*
* Interrupt system
*
*************************************/
INTERRUPT_GEN_MEMBER(stactics_state::interrupt)
{
move_motor();
device.execute().set_input_line(0, HOLD_LINE);
}
/*************************************
*
* Data CPU memory handlers
*
*************************************/
void stactics_state::main_map(address_map &map)
{
map(0x0000, 0x2fff).rom();
map(0x4000, 0x40ff).mirror(0x0700).ram();
map(0x5000, 0x5000).mirror(0x0fff).portr("IN0");
map(0x6000, 0x6000).mirror(0x0fff).portr("IN1");
map(0x6000, 0x6007).mirror(0x0f08).w(m_outlatch, FUNC(ls259_device::write_d0));
map(0x6010, 0x6017).mirror(0x0f08).w("audiolatch", FUNC(ls259_device::write_d0));
map(0x6020, 0x6027).mirror(0x0f08).w("lamplatch", FUNC(ls259_device::write_d0));
map(0x6030, 0x6030).mirror(0x0f0f).w(FUNC(stactics_state::speed_latch_w));
map(0x6040, 0x6040).mirror(0x0f0f).w(FUNC(stactics_state::shot_trigger_w));
map(0x6050, 0x6050).mirror(0x0f0f).w(FUNC(stactics_state::shot_flag_clear_w));
map(0x6060, 0x606f).mirror(0x0f00).writeonly().share("display_buffer");
map(0x6070, 0x609f).mirror(0x0f00).nopw();
/* map(0x60a0, 0x60ef).mirror(0x0f00).w(FUNC(stactics_state::sound2_w)); */
map(0x60f0, 0x60ff).mirror(0x0f00).nopw();
map(0x7000, 0x7000).mirror(0x0fff).portr("IN2");
map(0x8000, 0x8000).mirror(0x0fff).portr("IN3");
map(0x8000, 0x87ff).mirror(0x0800).w(FUNC(stactics_state::scroll_ram_w));
map(0x9000, 0x9000).mirror(0x0fff).r(FUNC(stactics_state::vert_pos_r));
map(0xa000, 0xa000).mirror(0x0fff).r(FUNC(stactics_state::horiz_pos_r));
map(0xb000, 0xbfff).ram().share("videoram_b");
map(0xc000, 0xcfff).noprw();
map(0xd000, 0xdfff).ram().share("videoram_d");
map(0xe000, 0xefff).ram().share("videoram_e");
map(0xf000, 0xffff).ram().share("videoram_f");
}
/*************************************
*
* Input port definitions
*
*************************************/
static INPUT_PORTS_START( stactics )
PORT_START("IN0") /* IN0 */
PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_BUTTON7 )
PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_BUTTON6 )
PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_BUTTON5 )
PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_BUTTON4 )
PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON3 )
PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_START1 )
PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_BUTTON2 )
PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_CUSTOM ) PORT_READ_LINE_MEMBER(stactics_state, motor_not_ready_r)
PORT_START("IN1") /* IN1 */
PORT_DIPNAME( 0x07, 0x07, DEF_STR( Coin_B ) )
PORT_DIPSETTING( 0x01, DEF_STR( 4C_1C ) )
PORT_DIPSETTING( 0x05, DEF_STR( 2C_1C ) )
PORT_DIPSETTING( 0x07, DEF_STR( 1C_1C ) )
PORT_DIPSETTING( 0x06, DEF_STR( 1C_2C ) )
PORT_DIPSETTING( 0x04, DEF_STR( 1C_3C ) )
PORT_DIPSETTING( 0x02, DEF_STR( 1C_4C ) )
PORT_DIPSETTING( 0x00, DEF_STR( 1C_5C ) )
PORT_DIPSETTING( 0x03, DEF_STR( 1C_6C ) )
PORT_DIPNAME( 0x38, 0x38, DEF_STR( Coin_A ) )
PORT_DIPSETTING( 0x08, DEF_STR( 4C_1C ) )
PORT_DIPSETTING( 0x28, DEF_STR( 2C_1C ) )
PORT_DIPSETTING( 0x38, DEF_STR( 1C_1C ) )
PORT_DIPSETTING( 0x30, DEF_STR( 1C_2C ) )
PORT_DIPSETTING( 0x20, DEF_STR( 1C_3C ) )
PORT_DIPSETTING( 0x10, DEF_STR( 1C_4C ) )
PORT_DIPSETTING( 0x00, DEF_STR( 1C_5C ) )
PORT_DIPSETTING( 0x18, DEF_STR( 1C_6C ) )
PORT_DIPNAME( 0x40, 0x00, "High Score Initial Entry" )
PORT_DIPSETTING( 0x40, DEF_STR( Off ) )
PORT_DIPSETTING( 0x00, DEF_STR( On ) )
PORT_DIPNAME( 0x80, 0x00, DEF_STR( Demo_Sounds ) )
PORT_DIPSETTING( 0x80, DEF_STR( Off ) )
PORT_DIPSETTING( 0x00, DEF_STR( On ) )
PORT_START("IN2") /* IN2 */
PORT_BIT( 0x07, IP_ACTIVE_HIGH, IPT_CUSTOM ) PORT_CUSTOM_MEMBER(stactics_state, get_rng)
PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_CUSTOM ) PORT_READ_LINE_MEMBER(stactics_state, frame_count_d3_r)
PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_COIN1 )
PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_COIN2 )
PORT_DIPNAME( 0x40, 0x40, DEF_STR( Free_Play ) )
PORT_DIPSETTING( 0x40, DEF_STR( Off ) )
PORT_DIPSETTING( 0x00, DEF_STR( On ) )
PORT_SERVICE( 0x80, IP_ACTIVE_LOW )
PORT_START("IN3") /* IN3 */
PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_BUTTON1 )
PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_CUSTOM ) PORT_READ_LINE_MEMBER(stactics_state, shot_standby_r)
PORT_DIPNAME( 0x04, 0x04, "Number of Barriers" )
PORT_DIPSETTING( 0x04, "4" )
PORT_DIPSETTING( 0x00, "6" )
PORT_DIPNAME( 0x08, 0x08, "Bonus Barriers" )
PORT_DIPSETTING( 0x08, "1" )
PORT_DIPSETTING( 0x00, "2" )
PORT_DIPNAME( 0x10, 0x00, "Extended Play" )
PORT_DIPSETTING( 0x10, DEF_STR( Off ) )
PORT_DIPSETTING( 0x00, DEF_STR( On ) )
PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_8WAY
PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_8WAY
PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_CUSTOM ) PORT_READ_LINE_MEMBER(stactics_state, not_shot_arrive_r)
PORT_START("FAKE") /* FAKE */
PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_8WAY
PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_8WAY
INPUT_PORTS_END
/*************************************
*
* Start
*
*************************************/
void stactics_state::machine_start()
{
m_vert_pos = 0;
m_horiz_pos = 0;
m_motor_on = false;
save_item(NAME(m_vert_pos));
save_item(NAME(m_horiz_pos));
save_item(NAME(m_motor_on));
}
/*************************************
*
* Machine driver
*
*************************************/
void stactics_state::stactics(machine_config &config)
{
/* basic machine hardware */
I8080(config, m_maincpu, 15.46848_MHz_XTAL / 8); // divider not verified
m_maincpu->set_addrmap(AS_PROGRAM, &stactics_state::main_map);
m_maincpu->set_vblank_int("screen", FUNC(stactics_state::interrupt));
LS259(config, m_outlatch); // 50
m_outlatch->q_out_cb<0>().set(FUNC(stactics_state::coin_lockout_1_w)); // COIN REJECT 1
m_outlatch->q_out_cb<1>().set(FUNC(stactics_state::coin_lockout_2_w)); // COIN REJECT 2
m_outlatch->q_out_cb<6>().set(FUNC(stactics_state::palette_bank_w)); // FLM COL 0
m_outlatch->q_out_cb<7>().set(FUNC(stactics_state::palette_bank_w)); // FLM COL 1
ls259_device &audiolatch(LS259(config, "audiolatch")); // 58 - TODO: implement these switches
audiolatch.q_out_cb<0>().set_nop(); // MUTE
audiolatch.q_out_cb<1>().set_nop(); // INV. DISTANCE A
audiolatch.q_out_cb<2>().set_nop(); // INV. DISTANCE B
audiolatch.q_out_cb<3>().set_nop(); // UFO
audiolatch.q_out_cb<4>().set_nop(); // INVADER
audiolatch.q_out_cb<5>().set_nop(); // EMEGENCY (sic)
audiolatch.q_out_cb<6>().set(FUNC(stactics_state::motor_w)); // overlaps rocket sound
audiolatch.q_out_cb<7>().set_nop(); // SOUND ON
ls259_device &lamplatch(LS259(config, "lamplatch")); // 96
lamplatch.q_out_cb<0>().set(FUNC(stactics_state::base_lamp_w<4>));
lamplatch.q_out_cb<1>().set(FUNC(stactics_state::base_lamp_w<3>));
lamplatch.q_out_cb<2>().set(FUNC(stactics_state::base_lamp_w<2>));
lamplatch.q_out_cb<3>().set(FUNC(stactics_state::base_lamp_w<1>));
lamplatch.q_out_cb<4>().set(FUNC(stactics_state::base_lamp_w<0>));
lamplatch.q_out_cb<5>().set(FUNC(stactics_state::start_lamp_w));
lamplatch.q_out_cb<6>().set(FUNC(stactics_state::barrier_lamp_w));
/* video hardware */
stactics_video(config);
/* audio hardware */
}
/*************************************
*
* ROM definition
*
*************************************/
ROM_START( stactics )
ROM_REGION( 0x10000, "maincpu", 0 )
ROM_LOAD( "epr-218x", 0x0000, 0x0800, CRC(b1186ad2) SHA1(88929a183ac0499619b3e07241f3b5a0c89bdab1) )
ROM_LOAD( "epr-219x", 0x0800, 0x0800, CRC(3b86036d) SHA1(6ad5e14dcfdbc6d2a0a32ae7f18ce41ab4b51eec) )
ROM_LOAD( "epr-220x", 0x1000, 0x0800, CRC(c58702da) SHA1(93936c46810722d435f9ddb0641defb741743dee) )
ROM_LOAD( "epr-221x", 0x1800, 0x0800, CRC(e327639e) SHA1(024929b65c71eaeb6d234a14d7535a7d5b98b8d3) )
ROM_LOAD( "epr-222y", 0x2000, 0x0800, CRC(24dd2bcc) SHA1(f77c59beccc1a77e3bfc2928ff532d6e221ff42d) )
ROM_LOAD( "epr-223x", 0x2800, 0x0800, CRC(7fef0940) SHA1(5b2af55f75ef0130f9202b6a916a96dbd601fcfa) )
ROM_REGION( 0x1040, "proms", 0 )
ROM_LOAD( "pr54", 0x0000, 0x0800, CRC(9640bd6e) SHA1(dd12952a6591f2056ac1b5688dca0a3a2ef69f2d) ) /* color/priority PROM */
ROM_LOAD( "pr55", 0x0800, 0x0800, CRC(f162673b) SHA1(83743780b6c1f8014df24fa0650000b7cb137d92) ) /* timing PROM (unused) */
ROM_LOAD( "pr65", 0x1000, 0x0020, CRC(a1506b9d) SHA1(037c3db2ea40eca459e8acba9d1506dd28d72d10) ) /* timing PROM (unused) */
ROM_LOAD( "pr66", 0x1020, 0x0020, CRC(78dcf300) SHA1(37034cc0cfa4a8ec47937a2a34b77ec56b387a9b) ) /* timing PROM (unused) */
ROM_REGION( 0x0820, "user1", 0 )
ROM_LOAD( "epr-217", 0x0000, 0x0800, CRC(38259f5f) SHA1(1f4182ffc2d78fca22711526bb2ae2cfe040173c) ) /* LED fire beam data */
ROM_LOAD( "pr67", 0x0800, 0x0020, CRC(b27874e7) SHA1(c24bc78c4b2ae01aaed5d994ce2e7c5e0f2eece8) ) /* LED timing ROM (unused) */
ROM_END
/*************************************
*
* Game driver
*
*************************************/
GAMEL( 1981, stactics, 0, stactics, stactics, stactics_state, empty_init, ORIENTATION_FLIP_X, "Sega", "Space Tactics", MACHINE_NO_SOUND | MACHINE_SUPPORTS_SAVE, layout_stactics )
|