summaryrefslogtreecommitdiffstatshomepage
path: root/trunk/src/mame/audio/spacefb.c
diff options
context:
space:
mode:
Diffstat (limited to 'trunk/src/mame/audio/spacefb.c')
-rw-r--r--trunk/src/mame/audio/spacefb.c92
1 files changed, 92 insertions, 0 deletions
diff --git a/trunk/src/mame/audio/spacefb.c b/trunk/src/mame/audio/spacefb.c
new file mode 100644
index 00000000000..01cb6c952a6
--- /dev/null
+++ b/trunk/src/mame/audio/spacefb.c
@@ -0,0 +1,92 @@
+/***************************************************************************
+
+ Space Firebird hardware
+
+****************************************************************************/
+
+#include "emu.h"
+#include "cpu/mcs48/mcs48.h"
+#include "sound/dac.h"
+#include "sound/samples.h"
+#include "includes/spacefb.h"
+
+
+READ8_MEMBER(spacefb_state::spacefb_audio_p2_r)
+{
+ return (m_sound_latch & 0x18) << 1;
+}
+
+
+READ8_MEMBER(spacefb_state::spacefb_audio_t0_r)
+{
+ return m_sound_latch & 0x20;
+}
+
+
+READ8_MEMBER(spacefb_state::spacefb_audio_t1_r)
+{
+ return m_sound_latch & 0x04;
+}
+
+
+WRITE8_MEMBER(spacefb_state::spacefb_port_1_w)
+{
+ samples_device *samples = machine().device<samples_device>("samples");
+
+ cputag_set_input_line(machine(), "audiocpu", 0, (data & 0x02) ? CLEAR_LINE : ASSERT_LINE);
+
+ /* enemy killed */
+ if (!(data & 0x01) && (m_sound_latch & 0x01)) samples->start(0,0);
+
+ /* ship fire */
+ if (!(data & 0x40) && (m_sound_latch & 0x40)) samples->start(1,1);
+
+ /*
+ * Explosion Noise
+ *
+ * Actual sample has a bit of attack at the start, but these doesn't seem to be an easy way
+ * to play the attack part, then loop the middle bit until the sample is turned off
+ * Fortunately it seems like the recorded sample of the &spaceship death is the longest the sample plays for.
+ * We loop it just in case it runs out
+ */
+ if ((data & 0x80) != (m_sound_latch & 0x80))
+ {
+ if (data & 0x80)
+ /* play decaying noise */
+ samples->start(2,3);
+ else
+ /* start looping noise */
+ samples->start(2,2, true);
+ }
+
+ m_sound_latch = data;
+}
+
+
+static const char *const spacefb_sample_names[] =
+{
+ "*spacefb",
+ "ekilled",
+ "shipfire",
+ "explode1",
+ "explode2",
+ 0
+};
+
+
+static const samples_interface spacefb_samples_interface =
+{
+ 3,
+ spacefb_sample_names
+};
+
+
+MACHINE_CONFIG_FRAGMENT( spacefb_audio )
+ MCFG_SPEAKER_STANDARD_MONO("mono")
+
+ MCFG_SOUND_ADD("dac", DAC, 0)
+ MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.50)
+
+ MCFG_SAMPLES_ADD("samples", spacefb_samples_interface)
+ MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.0)
+MACHINE_CONFIG_END