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Diffstat (limited to 'src/mame/drivers/wildfire.c')
-rw-r--r-- | src/mame/drivers/wildfire.c | 343 |
1 files changed, 343 insertions, 0 deletions
diff --git a/src/mame/drivers/wildfire.c b/src/mame/drivers/wildfire.c new file mode 100644 index 00000000000..992fcbc544c --- /dev/null +++ b/src/mame/drivers/wildfire.c @@ -0,0 +1,343 @@ +// license:BSD-3-Clause +// copyright-holders:hap +/*************************************************************************** + + Parker Brothers Wildfire, by Bob and Holly Doyle (prototype), and Garry Kitchen + * AMI S2150, labeled C10641 + + This is an electronic handheld pinball game. It has dozens of small leds + to create the illusion of a moving ball, and even the flippers are leds. + A drawing of a pinball table is added as overlay. + + NOTE!: MAME external artwork is required + + + TODO: + - sound emulation could still be improved + - when the game strobes a led faster, it should appear brighter, for example when + the ball hits one of the bumpers + - 7seg decoder is guessed + - MCU clock is unknown + +***************************************************************************/ + +#include "emu.h" +#include "cpu/amis2000/amis2000.h" +#include "sound/speaker.h" + +#include "wildfire.lh" // this is a test layout, use external artwork + +// master clock is a single stage RC oscillator: R=?K, C=?pf, +// S2000 default frequency is 850kHz +#define MASTER_CLOCK (850000) + + +class wildfire_state : public driver_device +{ +public: + wildfire_state(const machine_config &mconfig, device_type type, const char *tag) + : driver_device(mconfig, type, tag), + m_maincpu(*this, "maincpu"), + m_speaker(*this, "speaker"), + m_a12_decay_timer(*this, "a12_decay") + { } + + required_device<cpu_device> m_maincpu; + required_device<speaker_sound_device> m_speaker; + required_device<timer_device> m_a12_decay_timer; + + UINT8 m_d; + UINT16 m_a; + UINT8 m_q2; + UINT8 m_q3; + + UINT16 m_display_state[0x10]; + UINT16 m_display_cache[0x10]; + UINT8 m_display_decay[0x100]; + + DECLARE_WRITE8_MEMBER(write_d); + DECLARE_WRITE16_MEMBER(write_a); + DECLARE_WRITE_LINE_MEMBER(write_f); + + TIMER_DEVICE_CALLBACK_MEMBER(display_decay_tick); + bool index_is_7segled(int index); + void display_update(); + + TIMER_DEVICE_CALLBACK_MEMBER(reset_q2); + void write_a12(int state); + void sound_update(); + + virtual void machine_start(); +}; + + + +/*************************************************************************** + + LED Display + +***************************************************************************/ + +// The device strobes the outputs very fast, it is unnoticeable to the user. +// To prevent flickering here, we need to simulate a decay. + +// decay time, in steps of 1ms +#define DISPLAY_DECAY_TIME 40 + +inline bool wildfire_state::index_is_7segled(int index) +{ + // first 3 A are 7segleds + return (index < 3); +} + +// lamp translation table: Lzz from patent US4334679 FIG.4 = MAME lampxxy, +// where xx is led column and y is led row, eg. lamp103 is output A10 D3 +// (note: 2 mistakes in the patent: the L19 between L12 and L14 should be L13, and L84 should of course be L48) +/* + L0 = - L10 = lamp60 L20 = lamp41 L30 = lamp53 L40 = lamp57 L50 = lamp110 + L1 = lamp107 L11 = lamp50 L21 = lamp42 L31 = lamp43 L41 = lamp66 L51 = lamp111 + L2 = lamp106 L12 = lamp61 L22 = lamp52 L32 = lamp54 L42 = lamp76 L52 = lamp112 + L3 = lamp105 L13 = lamp71 L23 = lamp63 L33 = lamp55 L43 = lamp86 L53 = lamp113 + L4 = lamp104 L14 = lamp81 L24 = lamp73 L34 = lamp117 L44 = lamp96 L60 = lamp30 + L5 = lamp103 L15 = lamp92 L25 = lamp115 L35 = lamp75 L45 = lamp67 L61 = lamp30(!) + L6 = lamp102 L16 = lamp82 L26 = lamp93 L36 = lamp95 L46 = lamp77 L62 = lamp31 + L7 = lamp101 L17 = lamp72 L27 = lamp94 L37 = lamp56 L47 = lamp87 L63 = lamp31(!) + L8 = lamp80 L18 = lamp114 L28 = lamp84 L38 = lamp65 L48 = lamp97 L70 = lamp33 + L9 = lamp70 L19 = lamp51 L29 = lamp116 L39 = lamp85 L49 = - +*/ + +void wildfire_state::display_update() +{ + UINT16 active_state[0x10]; + + for (int i = 0; i < 0x10; i++) + { + // update current state + m_display_state[i] = (m_a >> i & 1) ? m_d : 0; + + active_state[i] = 0; + + for (int j = 0; j < 0x10; j++) + { + int di = j << 4 | i; + + // turn on powered segments + if (m_display_state[i] >> j & 1) + m_display_decay[di] = DISPLAY_DECAY_TIME; + + // determine active state + int ds = (m_display_decay[di] != 0) ? 1 : 0; + active_state[i] |= (ds << j); + } + } + + // on difference, send to output + for (int i = 0; i < 0x10; i++) + if (m_display_cache[i] != active_state[i]) + { + if (index_is_7segled(i)) + output_set_digit_value(i, BITSWAP8(active_state[i],7,0,1,2,3,4,5,6) & 0x7f); + + for (int j = 0; j < 8; j++) + output_set_lamp_value(i*10 + j, active_state[i] >> j & 1); + } + + memcpy(m_display_cache, active_state, sizeof(m_display_cache)); +} + +TIMER_DEVICE_CALLBACK_MEMBER(wildfire_state::display_decay_tick) +{ + // slowly turn off unpowered segments + for (int i = 0; i < 0x100; i++) + if (!(m_display_state[i & 0xf] >> (i>>4) & 1) && m_display_decay[i]) + m_display_decay[i]--; + + display_update(); +} + + + +/*************************************************************************** + + Sound + +***************************************************************************/ + +// Sound output is via a speaker between transistors Q2(from A12) and Q3(from F_out) +// A12 to Q2 has a little electronic circuit going, causing a slight delay. +// (see patent US4334679 FIG.5, the 2 resistors are 10K and the cap is a 4.7uF electrolytic) + +// decay time, in steps of 1ms +#define A12_DECAY_TIME 5 /* a complete guess */ + +void wildfire_state::sound_update() +{ + m_speaker->level_w(m_q2 & m_q3); +} + +WRITE_LINE_MEMBER(wildfire_state::write_f) +{ + // F_out pin: speaker out + m_q3 = (state) ? 1 : 0; + sound_update(); +} + +TIMER_DEVICE_CALLBACK_MEMBER(wildfire_state::reset_q2) +{ + m_q2 = 0; + sound_update(); +} + +void wildfire_state::write_a12(int state) +{ + if (state) + { + m_a12_decay_timer->adjust(attotime::never); + m_q2 = state; + sound_update(); + } + else if (m_a >> 12 & 1) + { + // falling edge + m_a12_decay_timer->adjust(attotime::from_msec(A12_DECAY_TIME)); + } +} + + + +/*************************************************************************** + + I/O + +***************************************************************************/ + +WRITE8_MEMBER(wildfire_state::write_d) +{ + // D0-D7: leds out + m_d = data; + display_update(); +} + +WRITE16_MEMBER(wildfire_state::write_a) +{ + data ^= 0x1fff; // active-low + + // A12: enable speaker + write_a12(data >> 12 & 1); + + // A0-A2: select 7segleds + // A3-A11: select other leds + m_a = data; + display_update(); +} + + + +/*************************************************************************** + + Inputs + +***************************************************************************/ + +static INPUT_PORTS_START( wildfire ) + PORT_START("IN1") // I + PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_BUTTON3 ) PORT_NAME("Shooter Button") + PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_NAME("Left Flipper") + PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_NAME("Right Flipper") + PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_UNUSED ) +INPUT_PORTS_END + + + +/*************************************************************************** + + Machine Config + +***************************************************************************/ + +void wildfire_state::machine_start() +{ + // zerofill + memset(m_display_state, 0, sizeof(m_display_state)); + memset(m_display_cache, 0, sizeof(m_display_cache)); + memset(m_display_decay, 0, sizeof(m_display_decay)); + + m_d = 0; + m_a = 0; + m_q2 = 0; + m_q3 = 0; + + // register for savestates + save_item(NAME(m_display_state)); + save_item(NAME(m_display_cache)); + save_item(NAME(m_display_decay)); + + save_item(NAME(m_d)); + save_item(NAME(m_a)); + save_item(NAME(m_q2)); + save_item(NAME(m_q3)); +} + +// LED segments A-G +enum +{ + lA = 0x40, + lB = 0x20, + lC = 0x10, + lD = 0x08, + lE = 0x04, + lF = 0x02, + lG = 0x01 +}; + +static const UINT8 wildfire_7seg_table[0x10] = +{ + 0x7e, 0x30, 0x6d, 0x79, 0x33, 0x5b, 0x5f, 0x70, 0x7f, 0x7b, // 0-9 unaltered + 0x77, // A -> unused? + lA+lB+lE+lF+lG, // b -> P + 0x4e, // C -> unused? + lD+lE+lF, // d -> L + 0x4f, // E -> unused? + lG // F -> - +}; + + +static MACHINE_CONFIG_START( wildfire, wildfire_state ) + + /* basic machine hardware */ + MCFG_CPU_ADD("maincpu", AMI_S2152, MASTER_CLOCK) + MCFG_AMI_S2000_7SEG_DECODER(wildfire_7seg_table) + MCFG_AMI_S2000_READ_I_CB(IOPORT("IN1")) + MCFG_AMI_S2000_WRITE_D_CB(WRITE8(wildfire_state, write_d)) + MCFG_AMI_S2000_WRITE_A_CB(WRITE16(wildfire_state, write_a)) + MCFG_AMI_S2152_FOUT_CB(WRITELINE(wildfire_state, write_f)) + + MCFG_TIMER_DRIVER_ADD_PERIODIC("display_decay", wildfire_state, display_decay_tick, attotime::from_msec(1)) + MCFG_TIMER_DRIVER_ADD("a12_decay", wildfire_state, reset_q2) + + MCFG_DEFAULT_LAYOUT(layout_wildfire) + + /* no video! */ + + /* sound hardware */ + MCFG_SPEAKER_STANDARD_MONO("mono") + MCFG_SOUND_ADD("speaker", SPEAKER_SOUND, 0) + MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.25) +MACHINE_CONFIG_END + + + +/*************************************************************************** + + Game driver(s) + +***************************************************************************/ + +ROM_START( wildfire ) + ROM_REGION( 0x0800, "maincpu", ROMREGION_ERASE00 ) + ROM_LOAD( "us4341385", 0x0000, 0x0400, CRC(84ac0f1f) SHA1(1e00ddd402acfc2cc267c34eed4b89d863e2144f) ) // from patent US4334679, data should be correct (it included checksums) + ROM_CONTINUE( 0x0600, 0x0200 ) +ROM_END + + +CONS( 1979, wildfire, 0, 0, wildfire, wildfire, driver_device, 0, "Parker Brothers", "Wildfire (patent)", MACHINE_IMPERFECT_SOUND | MACHINE_SUPPORTS_SAVE | MACHINE_REQUIRES_ARTWORK ) // note: pretty sure that it matches the commercial release |