summaryrefslogtreecommitdiffstatshomepage
path: root/src/mame/audio/astrof.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/mame/audio/astrof.c')
-rw-r--r--src/mame/audio/astrof.c255
1 files changed, 255 insertions, 0 deletions
diff --git a/src/mame/audio/astrof.c b/src/mame/audio/astrof.c
new file mode 100644
index 00000000000..6e480a2d8a9
--- /dev/null
+++ b/src/mame/audio/astrof.c
@@ -0,0 +1,255 @@
+/***************************************************************************
+
+ Astro Fighter hardware
+
+****************************************************************************/
+
+#include "driver.h"
+#include "sound/samples.h"
+#include "sound/sn76477.h"
+#include "includes/astrof.h"
+
+
+
+/*************************************
+ *
+ * Globals
+ *
+ *************************************/
+
+static UINT8 port_1_last;
+static UINT8 port_2_last;
+static UINT8 astrof_start_explosion;
+static UINT8 astrof_death_playing;
+static UINT8 astrof_bosskill_playing;
+
+
+
+/*************************************
+ *
+ * Machine setup
+ *
+ *************************************/
+
+
+MACHINE_START( astrof_audio )
+{
+ /* setup for save states */
+ state_save_register_global(port_1_last);
+ state_save_register_global(port_2_last);
+ state_save_register_global(astrof_start_explosion);
+ state_save_register_global(astrof_death_playing);
+ state_save_register_global(astrof_bosskill_playing);
+}
+
+
+
+/*************************************
+ *
+ * Astro Fighter
+ *
+ *************************************/
+
+#define SAMPLE_FIRE 0
+#define SAMPLE_EKILLED 1
+#define SAMPLE_WAVE 2
+#define SAMPLE_BOSSFIRE 6
+#define SAMPLE_FUEL 7
+#define SAMPLE_DEATH 8
+#define SAMPLE_BOSSHIT 9
+#define SAMPLE_BOSSKILL 10
+
+#define CHANNEL_FIRE 0
+#define CHANNEL_EXPLOSION 1
+#define CHANNEL_WAVE 2 /* background humm */
+#define CHANNEL_BOSSFIRE 2 /* there is no background humm on the boss level */
+#define CHANNEL_FUEL 3
+
+
+WRITE8_HANDLER( astrof_audio_1_w )
+{
+ UINT8 rising_bits = data & ~port_1_last;
+
+ if (astrof_death_playing)
+ astrof_death_playing = sample_playing(CHANNEL_EXPLOSION);
+
+ if (astrof_bosskill_playing)
+ astrof_bosskill_playing = sample_playing(CHANNEL_EXPLOSION);
+
+ /* D2 - explosion */
+ if (rising_bits & 0x04)
+ {
+ /* I *know* that the effect select port will be written shortly
+ after this one, so this works */
+ astrof_start_explosion = 1;
+ }
+
+ /* D0,D1,D3 - background noise */
+ if ((data & 0x08) && (~port_1_last & 0x08))
+ {
+ int sample = SAMPLE_WAVE + (data & 3);
+ sample_start(CHANNEL_WAVE, sample, 1);
+ }
+
+ if ((~data & 0x08) && (port_1_last & 0x08))
+ sample_stop(CHANNEL_WAVE);
+
+ /* D4 - boss laser */
+ if ((rising_bits & 0x10) && !astrof_bosskill_playing)
+ sample_start(CHANNEL_BOSSFIRE, SAMPLE_BOSSFIRE, 0);
+
+ /* D5 - fire */
+ if ((rising_bits & 0x20) && !astrof_bosskill_playing)
+ sample_start(CHANNEL_FIRE, SAMPLE_FIRE, 0);
+
+ /* D6 - don't know. Probably something to do with the explosion sounds */
+
+ /* D7 - sound enable bit */
+ sound_global_enable(data & 0x80);
+
+ port_1_last = data;
+}
+
+
+WRITE8_HANDLER( astrof_audio_2_w )
+{
+ UINT8 rising_bits = data & ~port_2_last;
+
+ /* D0-D2 - explosion select (triggered by D2 of the other port */
+ if (astrof_start_explosion)
+ {
+ /* this is really a compound effect, made up of I believe 3 sound
+ effects, but since our sample contains them all, disable playing
+ the other effects while the explosion is playing */
+logerror("Explosion: %x\n", data);
+ if (data & 0x04)
+ {
+ if (!astrof_bosskill_playing)
+ {
+ sample_start(CHANNEL_EXPLOSION, SAMPLE_BOSSKILL, 0);
+
+ astrof_bosskill_playing = 1;
+ }
+ }
+ else if (data & 0x02)
+ sample_start(CHANNEL_EXPLOSION, SAMPLE_BOSSHIT, 0);
+ else if (data & 0x01)
+ sample_start(CHANNEL_EXPLOSION, SAMPLE_EKILLED, 0);
+ else
+ {
+ if (!astrof_death_playing)
+ {
+ sample_start(CHANNEL_EXPLOSION, SAMPLE_DEATH, 0);
+
+ astrof_death_playing = 1;
+ }
+ }
+
+ astrof_start_explosion = 0;
+ }
+
+ /* D3 - low fuel warning */
+ if (rising_bits & 0x08)
+ sample_start(CHANNEL_FUEL, SAMPLE_FUEL, 0);
+
+ port_2_last = data;
+}
+
+
+static const char *astrof_sample_names[] =
+{
+ "*astrof",
+ "fire.wav",
+ "ekilled.wav",
+ "wave1.wav",
+ "wave2.wav",
+ "wave3.wav",
+ "wave4.wav",
+ "bossfire.wav",
+ "fuel.wav",
+ "death.wav",
+ "bosshit.wav",
+ "bosskill.wav",
+ 0
+};
+
+
+static struct Samplesinterface astrof_samples_interface =
+{
+ 4, /* 4 channels */
+ astrof_sample_names
+};
+
+
+
+MACHINE_DRIVER_START( astrof_audio )
+ MDRV_SPEAKER_STANDARD_MONO("mono")
+ MDRV_SOUND_ADD_TAG("samples", SAMPLES, 0)
+ MDRV_SOUND_CONFIG(astrof_samples_interface)
+ MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.50)
+MACHINE_DRIVER_END
+
+
+
+/*************************************
+ *
+ * Tomahawk
+ *
+ *************************************/
+
+WRITE8_HANDLER( tomahawk_audio_w )
+{
+ /* D0 - sonar */
+
+ /* D1 - UFO explosion */
+
+ /* D2 - morse */
+
+ /* D3 - missile */
+
+ /* D4 - UFO */
+
+ /* D5 - UFO under water */
+ SN76477_enable_w(0, (~data >> 5) & 0x01);
+
+ /* D6 - explosion */
+
+ /* D7 - sound enable bit */
+ sound_global_enable(data & 0x80);
+}
+
+
+static struct SN76477interface tomahawk_sn76477_interface =
+{
+ 0, /* 4 noise_res (N/C) */
+ 0, /* 5 filter_res (N/C) */
+ 0, /* 6 filter_cap (N/C) */
+ 0, /* 7 decay_res (N/C) */
+ 0, /* 8 attack_decay_cap (N/C) */
+ 0, /* 10 attack_res (N/C) */
+ RES_K(47), /* 11 amplitude_res */
+ RES_K(47), /* 12 feedback_res */
+ 0, /* 16 vco_voltage (N/C) */
+ CAP_U(0.033), /* 17 vco_cap */
+ RES_K(33), /* 18 vco_res */
+ 5.0, /* 19 pitch_voltage */
+ RES_K(47), /* 20 slf_res */
+ CAP_U(2.2), /* 21 slf_cap */
+ 0, /* 23 oneshot_cap (N/C) */
+ 0, /* 24 oneshot_res (N/C) */
+ 1, /* 22 vco */
+ 0, /* 26 mixer A */
+ 0, /* 25 mixer B */
+ 0, /* 27 mixer C */
+ 0, /* 1 envelope 1 */
+ 0, /* 28 envelope 2 */
+ 1 /* 9 enable (variable) */
+};
+
+
+MACHINE_DRIVER_START( tomahawk_audio )
+ MDRV_SPEAKER_STANDARD_MONO("mono")
+ MDRV_SOUND_ADD(SN76477, 0)
+ MDRV_SOUND_CONFIG(tomahawk_sn76477_interface)
+ MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.0)
+MACHINE_DRIVER_END