diff options
Diffstat (limited to 'trunk/src/mame/audio/redalert.c')
-rw-r--r-- | trunk/src/mame/audio/redalert.c | 423 |
1 files changed, 423 insertions, 0 deletions
diff --git a/trunk/src/mame/audio/redalert.c b/trunk/src/mame/audio/redalert.c new file mode 100644 index 00000000000..b12c59a68a7 --- /dev/null +++ b/trunk/src/mame/audio/redalert.c @@ -0,0 +1,423 @@ +/*************************************************************************** + + Irem Red Alert hardware + + If you have any questions about how this driver works, don't hesitate to + ask. - Mike Balfour (mab22@po.cwru.edu) + +****************************************************************************/ + +#include "emu.h" +#include "cpu/m6800/m6800.h" +#include "cpu/m6502/m6502.h" +#include "machine/rescap.h" +#include "cpu/i8085/i8085.h" +#include "machine/6821pia.h" +#include "sound/ay8910.h" +#include "sound/hc55516.h" +#include "includes/redalert.h" + + + +#define REDALERT_AUDIO_PCB_CLOCK (XTAL_12_5MHz) +#define REDALERT_AUDIO_CPU_CLOCK (REDALERT_AUDIO_PCB_CLOCK / 12) +#define REDALERT_AY8910_CLOCK (REDALERT_AUDIO_PCB_CLOCK / 6) +#define REDALERT_AUDIO_CPU_IRQ_FREQ (1000000000 / PERIOD_OF_555_ASTABLE_NSEC(RES_K(120), RES_K(2.7), CAP_U(0.01))) + +#define REDALERT_VOICE_PCB_CLOCK (XTAL_6MHz) +#define REDALERT_VOICE_CPU_CLOCK (REDALERT_VOICE_PCB_CLOCK) +#define REDALERT_HC55516_CLOCK (REDALERT_VOICE_PCB_CLOCK / 256) + +#define DEMONEYE_AUDIO_PCB_CLOCK (XTAL_3_579545MHz) +#define DEMONEYE_AUDIO_CPU_CLOCK (DEMONEYE_AUDIO_PCB_CLOCK / 4) /* what's the real divisor? */ +#define DEMONEYE_AY8910_CLOCK (DEMONEYE_AUDIO_PCB_CLOCK / 2) /* what's the real divisor? */ + + + +/************************************* + * + * Read Alert analog sounds + * + *************************************/ + +static WRITE8_DEVICE_HANDLER( redalert_analog_w ) +{ + /* this port triggers analog sounds + D0 = Formation Aircraft? + D1 = Dive bombers? + D2 = Helicopters? + D3 = Launcher firing? + D4 = Explosion #1? + D5 = Explosion #2? + D6 = Explosion #3? */ + + logerror("Analog: %02X\n",data); +} + + + +/************************************* + * + * Red Alert audio board + * + *************************************/ + +WRITE8_HANDLER( redalert_audio_command_w ) +{ + /* the byte is connected to port A of the AY8910 */ + soundlatch_w(space, 0, data); + + /* D7 is also connected to the NMI input of the CPU - + the NMI is actually toggled by a 74121 */ + if ((data & 0x80) == 0x00) + cputag_set_input_line(space->machine(), "audiocpu", INPUT_LINE_NMI, PULSE_LINE); +} + + +static WRITE8_DEVICE_HANDLER( redalert_AY8910_w ) +{ + redalert_state *state = device->machine().driver_data<redalert_state>(); + /* BC2 is connected to a pull-up resistor, so BC2=1 always */ + switch (data & 0x03) + { + /* BC1=0, BDIR=0 : inactive */ + case 0x00: + break; + + /* BC1=1, BDIR=0 : read from PSG */ + case 0x01: + state->m_ay8910_latch_1 = ay8910_r(device, 0); + break; + + /* BC1=0, BDIR=1 : write to PSG */ + /* BC1=1, BDIR=1 : latch address */ + case 0x02: + case 0x03: + default: + ay8910_data_address_w(device, data, state->m_ay8910_latch_2); + break; + } +} + + +static READ8_HANDLER( redalert_ay8910_latch_1_r ) +{ + redalert_state *state = space->machine().driver_data<redalert_state>(); + return state->m_ay8910_latch_1; +} + + +static WRITE8_HANDLER( redalert_ay8910_latch_2_w ) +{ + redalert_state *state = space->machine().driver_data<redalert_state>(); + state->m_ay8910_latch_2 = data; +} + + +static const ay8910_interface redalert_ay8910_interface = +{ + AY8910_LEGACY_OUTPUT, + AY8910_DEFAULT_LOADS, + DEVCB_MEMORY_HANDLER("audiocpu", PROGRAM, soundlatch_r), + DEVCB_NULL, /* port A/B read */ + DEVCB_NULL, + DEVCB_HANDLER(redalert_analog_w) /* port A/B write */ +}; + + +static ADDRESS_MAP_START( redalert_audio_map, AS_PROGRAM, 8 ) + ADDRESS_MAP_GLOBAL_MASK(0x7fff) + AM_RANGE(0x0000, 0x03ff) AM_MIRROR(0x0c00) AM_RAM + AM_RANGE(0x1000, 0x1000) AM_MIRROR(0x0ffe) AM_READNOP AM_DEVWRITE("aysnd", redalert_AY8910_w) + AM_RANGE(0x1001, 0x1001) AM_MIRROR(0x0ffe) AM_READWRITE(redalert_ay8910_latch_1_r, redalert_ay8910_latch_2_w) + AM_RANGE(0x2000, 0x6fff) AM_NOP + AM_RANGE(0x7000, 0x77ff) AM_MIRROR(0x0800) AM_ROM +ADDRESS_MAP_END + +/************************************* + * + * Red Alert audio board + * + *************************************/ + +static SOUND_START( redalert_audio ) +{ + redalert_state *state = machine.driver_data<redalert_state>(); + state->save_item(NAME(state->m_ay8910_latch_1)); + state->save_item(NAME(state->m_ay8910_latch_2)); +} + + +/************************************* + * + * Red Alert voice board + * + *************************************/ + +WRITE8_HANDLER( redalert_voice_command_w ) +{ + soundlatch2_w(space, 0, (data & 0x78) >> 3); + cputag_set_input_line(space->machine(), "voice", I8085_RST75_LINE, (~data & 0x80) ? ASSERT_LINE : CLEAR_LINE); +} + + +static WRITE_LINE_DEVICE_HANDLER( sod_callback ) +{ + hc55516_digit_w(device->machine().device("cvsd"), state); +} + + +static READ_LINE_DEVICE_HANDLER( sid_callback ) +{ + return hc55516_clock_state_r(device->machine().device("cvsd")); +} + + +static I8085_CONFIG( redalert_voice_i8085_config ) +{ + DEVCB_NULL, /* STATUS changed callback */ + DEVCB_NULL, /* INTE changed callback */ + DEVCB_LINE(sid_callback), /* SID changed callback (8085A only) */ + DEVCB_LINE(sod_callback) /* SOD changed callback (8085A only) */ +}; + + +static ADDRESS_MAP_START( redalert_voice_map, AS_PROGRAM, 8 ) + AM_RANGE(0x0000, 0x3fff) AM_ROM + AM_RANGE(0x4000, 0x7fff) AM_NOP + AM_RANGE(0x8000, 0x83ff) AM_MIRROR(0x3c00) AM_RAM + AM_RANGE(0xc000, 0xc000) AM_MIRROR(0x3fff) AM_READ(soundlatch2_r) AM_WRITENOP +ADDRESS_MAP_END + + + +/************************************* + * + * Red Alert audio start + * + *************************************/ + +static SOUND_START( redalert ) +{ + SOUND_START_CALL(redalert_audio); +} + + + +/************************************* + * + * Red Alert audio board (m37b) + * + *************************************/ + +static MACHINE_CONFIG_FRAGMENT( redalert_audio_m37b ) + + MCFG_CPU_ADD("audiocpu", M6502, REDALERT_AUDIO_CPU_CLOCK) + MCFG_CPU_PROGRAM_MAP(redalert_audio_map) + MCFG_CPU_PERIODIC_INT(irq0_line_hold, REDALERT_AUDIO_CPU_IRQ_FREQ) + + MCFG_SOUND_ADD("aysnd", AY8910, REDALERT_AY8910_CLOCK) + MCFG_SOUND_CONFIG(redalert_ay8910_interface) + MCFG_SOUND_ROUTE(0, "mono", 0.50) + MCFG_SOUND_ROUTE(1, "mono", 0.50) + /* channel C is used a noise source and is not connected to a speaker */ + +MACHINE_CONFIG_END + +/************************************* + * + * Red Alert voice board (ue17b) + * + *************************************/ + +static MACHINE_CONFIG_FRAGMENT( redalert_audio_voice ) + + MCFG_CPU_ADD("voice", I8085A, REDALERT_VOICE_CPU_CLOCK) + MCFG_CPU_CONFIG(redalert_voice_i8085_config) + MCFG_CPU_PROGRAM_MAP(redalert_voice_map) + + MCFG_SOUND_ADD("cvsd", HC55516, REDALERT_HC55516_CLOCK) + MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.50) +MACHINE_CONFIG_END + +/************************************* + * + * Red Alert + * + *************************************/ + +MACHINE_CONFIG_FRAGMENT( redalert_audio ) + + MCFG_SPEAKER_STANDARD_MONO("mono") + + MCFG_FRAGMENT_ADD( redalert_audio_m37b ) + MCFG_FRAGMENT_ADD( redalert_audio_voice ) + + MCFG_SOUND_START( redalert ) + +MACHINE_CONFIG_END + +/************************************* + * + * Red Alert + * + *************************************/ + +MACHINE_CONFIG_FRAGMENT( ww3_audio ) + + MCFG_SPEAKER_STANDARD_MONO("mono") + + MCFG_FRAGMENT_ADD( redalert_audio_m37b ) + + MCFG_SOUND_START( redalert_audio ) + +MACHINE_CONFIG_END + +/************************************* + * + * Demoneye-X audio board + * + *************************************/ + + +WRITE8_HANDLER( demoneye_audio_command_w ) +{ + /* the byte is connected to port A of the AY8910 */ + soundlatch_w(space, 0, data); + cputag_set_input_line(space->machine(), "audiocpu", INPUT_LINE_NMI, PULSE_LINE); +} + + +static WRITE8_DEVICE_HANDLER( demoneye_ay8910_latch_1_w ) +{ + redalert_state *state = device->machine().driver_data<redalert_state>(); + state->m_ay8910_latch_1 = data; +} + + +static READ8_DEVICE_HANDLER( demoneye_ay8910_latch_2_r ) +{ + redalert_state *state = device->machine().driver_data<redalert_state>(); + return state->m_ay8910_latch_2; +} + + +static WRITE8_DEVICE_HANDLER( demoneye_ay8910_data_w ) +{ + redalert_state *state = device->machine().driver_data<redalert_state>(); + device_t *ay1 = device->machine().device("ay1"); + device_t *ay2 = device->machine().device("ay2"); + + switch (state->m_ay8910_latch_1 & 0x03) + { + case 0x00: + if (state->m_ay8910_latch_1 & 0x10) + ay8910_data_w(ay1, 0, data); + + if (state->m_ay8910_latch_1 & 0x20) + ay8910_data_w(ay2, 0, data); + + break; + + case 0x01: + if (state->m_ay8910_latch_1 & 0x10) + state->m_ay8910_latch_2 = ay8910_r(ay1, 0); + + if (state->m_ay8910_latch_1 & 0x20) + state->m_ay8910_latch_2 = ay8910_r(ay2, 0); + + break; + + case 0x03: + if (state->m_ay8910_latch_1 & 0x10) + ay8910_address_w(ay1, 0, data); + + if (state->m_ay8910_latch_1 & 0x20) + ay8910_address_w(ay2, 0, data); + + break; + + default: + logerror("demoneye_ay8910_data_w called with latch %02X data %02X\n", state->m_ay8910_latch_1, data); + break; + } +} + + +static ADDRESS_MAP_START( demoneye_audio_map, AS_PROGRAM, 8 ) + ADDRESS_MAP_GLOBAL_MASK(0x3fff) + AM_RANGE(0x0000, 0x007f) AM_RAM + AM_RANGE(0x0500, 0x0503) AM_DEVREADWRITE_MODERN("sndpia", pia6821_device, read, write) + AM_RANGE(0x2000, 0x3fff) AM_ROM +ADDRESS_MAP_END + + +static const ay8910_interface demoneye_ay8910_interface = +{ + AY8910_LEGACY_OUTPUT, + AY8910_DEFAULT_LOADS, + DEVCB_MEMORY_HANDLER("audiocpu", PROGRAM, soundlatch_r), + DEVCB_NULL, /* port A/B read */ + DEVCB_NULL, + DEVCB_NULL /* port A/B write */ +}; + + +static const pia6821_interface demoneye_pia_intf = +{ + DEVCB_HANDLER(demoneye_ay8910_latch_2_r), /* port A in */ + DEVCB_NULL, /* port B in */ + DEVCB_NULL, /* line CA1 in */ + DEVCB_NULL, /* line CB1 in */ + DEVCB_NULL, /* line CA2 in */ + DEVCB_NULL, /* line CB2 in */ + DEVCB_HANDLER(demoneye_ay8910_data_w), /* port A out */ + DEVCB_HANDLER(demoneye_ay8910_latch_1_w), /* port B out */ + DEVCB_NULL, /* line CA2 out */ + DEVCB_NULL, /* port CB2 out */ + DEVCB_NULL, /* IRQA */ + DEVCB_NULL /* IRQB */ +}; + + + +/************************************* + * + * Demoneye-X audio start + * + *************************************/ + +static SOUND_START( demoneye ) +{ + redalert_state *state = machine.driver_data<redalert_state>(); + state->save_item(NAME(state->m_ay8910_latch_1)); + state->save_item(NAME(state->m_ay8910_latch_2)); +} + + + +/************************************* + * + * Demoneye-X machine driver + * + *************************************/ + +MACHINE_CONFIG_FRAGMENT( demoneye_audio ) + + MCFG_CPU_ADD("audiocpu", M6802, DEMONEYE_AUDIO_CPU_CLOCK) + MCFG_CPU_PROGRAM_MAP(demoneye_audio_map) + MCFG_CPU_PERIODIC_INT(irq0_line_hold, REDALERT_AUDIO_CPU_IRQ_FREQ) /* guess */ + + MCFG_PIA6821_ADD("sndpia", demoneye_pia_intf) + + MCFG_SOUND_START( demoneye ) + + MCFG_SPEAKER_STANDARD_MONO("mono") + + MCFG_SOUND_ADD("ay1", AY8910, DEMONEYE_AY8910_CLOCK) + MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.50) + + MCFG_SOUND_ADD("ay2", AY8910, DEMONEYE_AY8910_CLOCK) + MCFG_SOUND_CONFIG(demoneye_ay8910_interface) + MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.50) +MACHINE_CONFIG_END |