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// license:GPL-2.0+
// copyright-holders:Norbert Kehrer
/***************************************************************************
Super Tank
(c) 1981 Video Games GmbH
Reverse-engineering and MAME driver by Norbert Kehrer (December 2003).
****************************************************************************
Hardware:
---------
CPU TMS9980 (Texas Instruments)
Sound chip AY-3-8910
Memory map:
-----------
>0000 - >07ff Fixed ROM
>0800 - >17ff Bank-switched ROM
>1800 - >1bff RAM
>1efc Input port 1
>1efd Input port 2
>1efe Read: DIP switch port 1
Write: Control port of AY-3-8910 sound chip
>1eff Read: DIP switch port 2
Write: Data port of AY-3-8910
>2000 - >3fff Video RAM (CPU view of it, in reality there are 24 KB on the video board)
Input ports:
------------
Input port 0, mapped to memory address 0x1efc:
7654 3210
0 Player 2 Right
0 Player 2 Left
0 Player 2 Down
0 Player 2 Up
0 Player 1 Right
0 Player 1 Left
0 Player 1 Down
0 Player 1 Up
Input port 1, mapped to memory address 0x1efd:
7654 3210
0 Player 2 Fire
0 Player 1 Fire
0 ??
0 ??
0 Start 1 player game
0 Start 2 players game
0 Coin (strobe)
0 ??
DIP switch ports:
-----------------
DIP switch port 1, mapped to memory address 0x1efe:
7654 3210
0 Not used (?)
0 Not used (?)
0 Tanks per player: 1 = 5 tanks, 0 = 3 tanks
0 Extra tank: 1 = at 10,000, 0 = at 15,000 pts.
000 Coinage
0 Not used (?)
DIP switch port 2, mapped to memory address 0x1eff:
7654 3210
1 ??
1 ??
1 ??
1 ??
1 ??
1 ??
1 ??
1 ??
CRU lines:
----------
>400 Select bitplane for writes into video RAM (bit 0)
>401 Select bitplane for writes into video RAM (bit 1)
>402 ROM bank selector (bit 0)
>404 ROM bank selector (bit 1)
>406 Interrupt acknowledge (clears interrupt line)
>407 Watchdog reset (?)
>b12 Unknown, maybe some special-hardware sound effect or lights blinking (?)
>b13 Unknown, maybe some special-hardware sound effect or lights blinking (?)
XTAL (on CPU board) is marked 20.790 on one PCB, 22.118 on another. The
former value is correct according to the parts list in the service manual.
***************************************************************************/
#include "emu.h"
#include "cpu/tms9900/tms9980a.h"
#include "machine/74259.h"
#include "machine/watchdog.h"
#include "sound/ay8910.h"
#include "screen.h"
#include "speaker.h"
/* the color PROM is 32 bytes, but it is a repeating
every 8 bytes */
#define NUM_PENS (8)
class supertnk_state : public driver_device
{
public:
supertnk_state(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig, type, tag)
, m_maincpu(*this, "maincpu")
, m_watchdog(*this, "watchdog")
{ }
void supertnk(machine_config &config);
void init_supertnk();
protected:
virtual void machine_start() override;
virtual void video_start() override;
private:
DECLARE_WRITE_LINE_MEMBER(bankswitch_0_w);
DECLARE_WRITE_LINE_MEMBER(bankswitch_1_w);
DECLARE_WRITE_LINE_MEMBER(interrupt_enable_w);
DECLARE_WRITE_LINE_MEMBER(watchdog_reset_w);
void videoram_w(offs_t offset, uint8_t data);
uint8_t videoram_r(offs_t offset);
DECLARE_WRITE_LINE_MEMBER(bitplane_select_0_w);
DECLARE_WRITE_LINE_MEMBER(bitplane_select_1_w);
uint32_t screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect);
DECLARE_WRITE_LINE_MEMBER(vblank_interrupt);
void supertnk_io_map(address_map &map);
void supertnk_map(address_map &map);
std::unique_ptr<uint8_t[]> m_videoram[3];
uint8_t m_rom_bank = 0;
uint8_t m_bitplane_select = 0;
pen_t m_pens[NUM_PENS];
bool m_interrupt_enable = false;
required_device<cpu_device> m_maincpu;
required_device<watchdog_timer_device> m_watchdog;
};
void supertnk_state::machine_start()
{
membank("bank1")->configure_entries(0, 4, memregion("maincpu")->base() + 0x10000, 0x1000);
save_item(NAME(m_rom_bank));
save_item(NAME(m_bitplane_select));
save_item(NAME(m_interrupt_enable));
}
/*************************************
*
* Memory banking
*
*************************************/
WRITE_LINE_MEMBER(supertnk_state::bankswitch_0_w)
{
m_rom_bank = (m_rom_bank & 0x02) | (state ? 0x01 : 0x00);
membank("bank1")->set_entry(m_rom_bank);
}
WRITE_LINE_MEMBER(supertnk_state::bankswitch_1_w)
{
m_rom_bank = (m_rom_bank & 0x01) | (state ? 0x02 : 0x00);
membank("bank1")->set_entry(m_rom_bank);
}
/*************************************
*
* Interrupt generation
*
*************************************/
WRITE_LINE_MEMBER(supertnk_state::vblank_interrupt)
{
if (state && m_interrupt_enable)
m_maincpu->set_input_line(INT_9980A_LEVEL4, ASSERT_LINE);
}
WRITE_LINE_MEMBER(supertnk_state::interrupt_enable_w)
{
m_interrupt_enable = state;
if (!state)
m_maincpu->set_input_line(INT_9980A_LEVEL4, CLEAR_LINE);
}
WRITE_LINE_MEMBER(supertnk_state::watchdog_reset_w)
{
m_watchdog->watchdog_enable(!state);
}
/*************************************
*
* Video system
*
*************************************/
void supertnk_state::video_start()
{
offs_t i;
const uint8_t *prom = memregion("proms")->base();
for (i = 0; i < NUM_PENS; i++)
{
uint8_t data = prom[i];
m_pens[i] = rgb_t(pal1bit(data >> 2), pal1bit(data >> 5), pal1bit(data >> 6));
}
for (int i = 0; i < 3; i++)
{
m_videoram[i] = std::make_unique<uint8_t[]>(0x2000);
save_pointer(NAME(m_videoram[i]), 0x2000, i);
}
}
void supertnk_state::videoram_w(offs_t offset, uint8_t data)
{
if (m_bitplane_select > 2)
{
m_videoram[0][offset] = 0;
m_videoram[1][offset] = 0;
m_videoram[2][offset] = 0;
}
else
{
m_videoram[m_bitplane_select][offset] = data;
}
}
uint8_t supertnk_state::videoram_r(offs_t offset)
{
uint8_t ret = 0x00;
if (m_bitplane_select < 3)
ret = m_videoram[m_bitplane_select][offset];
return ret;
}
WRITE_LINE_MEMBER(supertnk_state::bitplane_select_0_w)
{
m_bitplane_select = (m_bitplane_select & 0x02) | (state ? 0x01 : 0x00);
}
WRITE_LINE_MEMBER(supertnk_state::bitplane_select_1_w)
{
m_bitplane_select = (m_bitplane_select & 0x01) | (state ? 0x02 : 0x00);
}
uint32_t supertnk_state::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect)
{
for (offs_t offs = 0; offs < 0x2000; offs++)
{
uint8_t y = offs >> 5;
uint8_t x = offs << 3;
uint8_t data0 = m_videoram[0][offs];
uint8_t data1 = m_videoram[1][offs];
uint8_t data2 = m_videoram[2][offs];
for (int i = 0; i < 8; i++)
{
uint8_t color = ((data0 & 0x80) >> 5) | ((data1 & 0x80) >> 6) | ((data2 & 0x80) >> 7);
bitmap.pix(y, x) = m_pens[color];
data0 <<= 1;
data1 <<= 1;
data2 <<= 1;
x++;
}
}
return 0;
}
/*************************************
*
* Memory handlers
*
*************************************/
void supertnk_state::supertnk_map(address_map &map)
{
map(0x0000, 0x07ff).rom();
map(0x0800, 0x17ff).bankr("bank1");
map(0x1800, 0x1bff).ram();
map(0x1efc, 0x1efc).portr("JOYS");
map(0x1efd, 0x1efd).portr("INPUTS");
map(0x1efe, 0x1eff).w("aysnd", FUNC(ay8910_device::address_data_w));
map(0x1efe, 0x1efe).portr("DSW");
map(0x1eff, 0x1eff).portr("UNK");
map(0x2000, 0x3fff).rw(FUNC(supertnk_state::videoram_r), FUNC(supertnk_state::videoram_w));
}
/*************************************
*
* Port handlers
*
*************************************/
void supertnk_state::supertnk_io_map(address_map &map)
{
map(0x0000, 0x0001).nopw();
map(0x0800, 0x080f).w("outlatch", FUNC(ls259_device::write_d0));
}
/*************************************
*
* Port definitions
*
*************************************/
static INPUT_PORTS_START( supertnk )
PORT_START("JOYS")
PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_PLAYER(1)
PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_PLAYER(1)
PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_PLAYER(1)
PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_PLAYER(1)
PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_PLAYER(2)
PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_PLAYER(2)
PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_PLAYER(2)
PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_PLAYER(2)
PORT_START("INPUTS")
PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_UNUSED )
PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_COIN1 ) PORT_IMPULSE(1)
PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_START1 )
PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_START2 )
PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_UNUSED )
PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_UNUSED )
PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_PLAYER(1)
PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_PLAYER(2)
PORT_START("DSW")
PORT_DIPNAME( 0x01, 0x00, DEF_STR( Unknown ) )
PORT_DIPSETTING( 0x00, DEF_STR( Off ) )
PORT_DIPSETTING( 0x01, DEF_STR( On ) )
PORT_DIPNAME( 0x0e, 0x02, DEF_STR( Coinage ) )
PORT_DIPSETTING( 0x02, DEF_STR( 1C_1C ) )
PORT_DIPSETTING( 0x0e, DEF_STR( 1C_2C ) )
PORT_DIPSETTING( 0x0c, DEF_STR( 1C_3C ) )
PORT_DIPSETTING( 0x0a, DEF_STR( 1C_4C ) )
PORT_DIPSETTING( 0x08, DEF_STR( 1C_5C ) )
PORT_DIPSETTING( 0x06, DEF_STR( 1C_6C ) )
PORT_DIPSETTING( 0x04, DEF_STR( 1C_7C ) )
PORT_DIPSETTING( 0x00, DEF_STR( Free_Play ) )
PORT_DIPNAME( 0x10, 0x00, DEF_STR( Bonus_Life ) )
PORT_DIPSETTING( 0x00, "at 15,000 points" )
PORT_DIPSETTING( 0x10, "at 10,000 points" )
PORT_DIPNAME( 0x20, 0x00, DEF_STR( Lives ) )
PORT_DIPSETTING( 0x00, "3" )
PORT_DIPSETTING( 0x20, "5" )
PORT_DIPNAME( 0x40, 0x00, DEF_STR( Unknown ) )
PORT_DIPSETTING( 0x00, DEF_STR( Off ) )
PORT_DIPSETTING( 0x40, DEF_STR( On ) )
PORT_DIPNAME( 0x80, 0x00, DEF_STR( Unknown ) )
PORT_DIPSETTING( 0x00, DEF_STR( Off ) )
PORT_DIPSETTING( 0x80, DEF_STR( On ) )
PORT_START("UNK")
PORT_DIPNAME( 0x01, 0x01, DEF_STR( Unknown ) )
PORT_DIPSETTING( 0x00, DEF_STR( Off ) )
PORT_DIPSETTING( 0x01, DEF_STR( On ) )
PORT_DIPNAME( 0x02, 0x02, DEF_STR( Unknown ) )
PORT_DIPSETTING( 0x00, DEF_STR( Off ) )
PORT_DIPSETTING( 0x02, DEF_STR( On ) )
PORT_DIPNAME( 0x04, 0x04, DEF_STR( Unknown ) )
PORT_DIPSETTING( 0x00, DEF_STR( Off ) )
PORT_DIPSETTING( 0x04, DEF_STR( On ) )
PORT_DIPNAME( 0x08, 0x08, DEF_STR( Unknown ) )
PORT_DIPSETTING( 0x00, DEF_STR( Off ) )
PORT_DIPSETTING( 0x08, DEF_STR( On ) )
PORT_DIPNAME( 0x10, 0x10, DEF_STR( Unknown ) )
PORT_DIPSETTING( 0x00, DEF_STR( Off ) )
PORT_DIPSETTING( 0x10, DEF_STR( On ) )
PORT_DIPNAME( 0x20, 0x20, DEF_STR( Unknown ) )
PORT_DIPSETTING( 0x00, DEF_STR( Off ) )
PORT_DIPSETTING( 0x20, DEF_STR( On ) )
PORT_DIPNAME( 0x40, 0x40, DEF_STR( Unknown ) )
PORT_DIPSETTING( 0x00, DEF_STR( Off ) )
PORT_DIPSETTING( 0x40, DEF_STR( On ) )
PORT_DIPNAME( 0x80, 0x80, DEF_STR( Unknown ) )
PORT_DIPSETTING( 0x00, DEF_STR( Off ) )
PORT_DIPSETTING( 0x80, DEF_STR( On ) )
INPUT_PORTS_END
/*************************************
*
* Machine driver
*
*************************************/
void supertnk_state::supertnk(machine_config &config)
{
// CPU TMS9980A; no line connections
TMS9980A(config, m_maincpu, 20.79_MHz_XTAL / 2); // divider not verified (possibly should be /3)
m_maincpu->set_addrmap(AS_PROGRAM, &supertnk_state::supertnk_map);
m_maincpu->set_addrmap(AS_IO, &supertnk_state::supertnk_io_map);
ls259_device &outlatch(LS259(config, "outlatch")); // on CPU board near 2114 SRAM
outlatch.q_out_cb<0>().set(FUNC(supertnk_state::bitplane_select_0_w));
outlatch.q_out_cb<1>().set(FUNC(supertnk_state::bitplane_select_1_w));
outlatch.q_out_cb<2>().set(FUNC(supertnk_state::bankswitch_0_w));
outlatch.q_out_cb<4>().set(FUNC(supertnk_state::bankswitch_1_w));
outlatch.q_out_cb<6>().set(FUNC(supertnk_state::watchdog_reset_w)).invert();
outlatch.q_out_cb<7>().set(FUNC(supertnk_state::interrupt_enable_w));
WATCHDOG_TIMER(config, m_watchdog);
/* video hardware */
screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER));
screen.set_raw(20.79_MHz_XTAL / 4, 330, 0, 32*8, 315, 0, 32*8); // parameters guessed
screen.set_screen_update(FUNC(supertnk_state::screen_update));
screen.screen_vblank().set(FUNC(supertnk_state::vblank_interrupt));
/* audio hardware */
SPEAKER(config, "mono").front_center();
AY8910(config, "aysnd", 2000000).add_route(ALL_OUTPUTS, "mono", 0.50);
}
/*************************************
*
* ROM definition
*
*************************************/
ROM_START( supertnk )
ROM_REGION( 0x14000, "maincpu", 0 ) /* 64k for TMS9980 code + 16k of ROM */
ROM_LOAD( "supertan.2d", 0x00000, 0x0800, CRC(1656a2c1) SHA1(1d49945aed105003a051cfbf646af7a4be1b7e86) )
ROM_LOAD( "supertnk.3d", 0x10800, 0x0800, CRC(8b023a9a) SHA1(1afdc8d75f2ca04153bac20c0e3e123e2a7acdb7) )
ROM_CONTINUE( 0x10000, 0x0800)
ROM_LOAD( "supertnk.4d", 0x11800, 0x0800, CRC(b8249e5c) SHA1(ef4bb714b0c1b97890a067f05fc50ab3426ce37f) )
ROM_CONTINUE( 0x11000, 0x0800)
ROM_LOAD( "supertnk.8d", 0x12800, 0x0800, CRC(d8175a4f) SHA1(cba7b426773ac86c81a9eac81087a2db268cd0f9) )
ROM_CONTINUE( 0x12000, 0x0800)
ROM_LOAD( "supertnk.9d", 0x13800, 0x0800, CRC(a34a494a) SHA1(9b7f0560e9d569ee25eae56f31886d50a3153dcc) )
ROM_CONTINUE( 0x13000, 0x0800)
ROM_REGION( 0x0060, "proms", 0 )
ROM_LOAD( "supertnk.clr", 0x0000, 0x0020, CRC(9ae1faee) SHA1(19de4bb8bc389d98c8f8e35c755fad96e1a6a0cd) ) /* color PROM */
ROM_LOAD( "supertnk.s", 0x0020, 0x0020, CRC(91722fcf) SHA1(f77386014b459cc151d2990ac823b91c04e8d319) ) /* unknown - sync? */
ROM_LOAD( "supertnk.t", 0x0040, 0x0020, CRC(154390bd) SHA1(4dc0fd7bd8999d2670c8d93aaada835d2a84d4db) ) /* unknown - sync? */
ROM_END
/*************************************
*
* Game drivers
*
*************************************/
void supertnk_state::init_supertnk()
{
/* decode the TMS9980 ROMs */
uint8_t *rom = memregion("maincpu")->base();
size_t len = memregion("maincpu")->bytes();
for (offs_t offs = 0; offs < len; offs++)
{
rom[offs] = bitswap<8>(rom[offs],0,1,2,3,4,5,6,7);
}
}
GAME( 1981, supertnk, 0, supertnk, supertnk, supertnk_state, init_supertnk, ROT90, "Video Games GmbH", "Super Tank", MACHINE_SUPPORTS_SAVE )
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