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-rw-r--r--trunk/src/mame/audio/cyberbal.c165
1 files changed, 165 insertions, 0 deletions
diff --git a/trunk/src/mame/audio/cyberbal.c b/trunk/src/mame/audio/cyberbal.c
new file mode 100644
index 00000000000..4d473def0ea
--- /dev/null
+++ b/trunk/src/mame/audio/cyberbal.c
@@ -0,0 +1,165 @@
+/***************************************************************************
+
+ Cyberball 68000 sound simulator
+
+****************************************************************************/
+
+#include "emu.h"
+#include "sound/dac.h"
+#include "sound/2151intf.h"
+#include "machine/atarigen.h"
+#include "includes/cyberbal.h"
+
+
+static void update_sound_68k_interrupts(running_machine &machine);
+
+
+
+void cyberbal_sound_reset(running_machine &machine)
+{
+ cyberbal_state *state = machine.driver_data<cyberbal_state>();
+
+ /* reset the sound system */
+ state->m_bank_base = &machine.region("audiocpu")->base()[0x10000];
+ memory_set_bankptr(machine, "soundbank", &state->m_bank_base[0x0000]);
+ state->m_fast_68k_int = state->m_io_68k_int = 0;
+ state->m_sound_data_from_68k = state->m_sound_data_from_6502 = 0;
+ state->m_sound_data_from_68k_ready = state->m_sound_data_from_6502_ready = 0;
+}
+
+
+
+/*************************************
+ *
+ * 6502 Sound Interface
+ *
+ *************************************/
+
+READ8_HANDLER( cyberbal_special_port3_r )
+{
+ cyberbal_state *state = space->machine().driver_data<cyberbal_state>();
+ int temp = input_port_read(space->machine(), "JSAII");
+ if (!(input_port_read(space->machine(), "IN0") & 0x8000)) temp ^= 0x80;
+ if (state->m_cpu_to_sound_ready) temp ^= 0x40;
+ if (state->m_sound_to_cpu_ready) temp ^= 0x20;
+ return temp;
+}
+
+
+READ8_HANDLER( cyberbal_sound_6502_stat_r )
+{
+ cyberbal_state *state = space->machine().driver_data<cyberbal_state>();
+ int temp = 0xff;
+ if (state->m_sound_data_from_6502_ready) temp ^= 0x80;
+ if (state->m_sound_data_from_68k_ready) temp ^= 0x40;
+ return temp;
+}
+
+
+WRITE8_HANDLER( cyberbal_sound_bank_select_w )
+{
+ cyberbal_state *state = space->machine().driver_data<cyberbal_state>();
+ memory_set_bankptr(space->machine(), "soundbank", &state->m_bank_base[0x1000 * ((data >> 6) & 3)]);
+ coin_counter_w(space->machine(), 1, (data >> 5) & 1);
+ coin_counter_w(space->machine(), 0, (data >> 4) & 1);
+ cputag_set_input_line(space->machine(), "dac", INPUT_LINE_RESET, (data & 0x08) ? CLEAR_LINE : ASSERT_LINE);
+ if (!(data & 0x01)) devtag_reset(space->machine(), "ymsnd");
+}
+
+
+READ8_HANDLER( cyberbal_sound_68k_6502_r )
+{
+ cyberbal_state *state = space->machine().driver_data<cyberbal_state>();
+ state->m_sound_data_from_68k_ready = 0;
+ return state->m_sound_data_from_68k;
+}
+
+
+WRITE8_HANDLER( cyberbal_sound_68k_6502_w )
+{
+ cyberbal_state *state = space->machine().driver_data<cyberbal_state>();
+
+ state->m_sound_data_from_6502 = data;
+ state->m_sound_data_from_6502_ready = 1;
+
+ if (!state->m_io_68k_int)
+ {
+ state->m_io_68k_int = 1;
+ update_sound_68k_interrupts(space->machine());
+ }
+}
+
+
+
+/*************************************
+ *
+ * 68000 Sound Interface
+ *
+ *************************************/
+
+static void update_sound_68k_interrupts(running_machine &machine)
+{
+ cyberbal_state *state = machine.driver_data<cyberbal_state>();
+ cputag_set_input_line(machine, "dac", 6, state->m_fast_68k_int ? ASSERT_LINE : CLEAR_LINE);
+ cputag_set_input_line(machine, "dac", 2, state->m_io_68k_int ? ASSERT_LINE : CLEAR_LINE);
+}
+
+
+INTERRUPT_GEN( cyberbal_sound_68k_irq_gen )
+{
+ cyberbal_state *state = device->machine().driver_data<cyberbal_state>();
+ if (!state->m_fast_68k_int)
+ {
+ state->m_fast_68k_int = 1;
+ update_sound_68k_interrupts(device->machine());
+ }
+}
+
+
+WRITE16_HANDLER( cyberbal_io_68k_irq_ack_w )
+{
+ cyberbal_state *state = space->machine().driver_data<cyberbal_state>();
+ if (state->m_io_68k_int)
+ {
+ state->m_io_68k_int = 0;
+ update_sound_68k_interrupts(space->machine());
+ }
+}
+
+
+READ16_HANDLER( cyberbal_sound_68k_r )
+{
+ cyberbal_state *state = space->machine().driver_data<cyberbal_state>();
+ int temp = (state->m_sound_data_from_6502 << 8) | 0xff;
+
+ state->m_sound_data_from_6502_ready = 0;
+
+ if (state->m_sound_data_from_6502_ready) temp ^= 0x08;
+ if (state->m_sound_data_from_68k_ready) temp ^= 0x04;
+ return temp;
+}
+
+
+WRITE16_HANDLER( cyberbal_sound_68k_w )
+{
+ cyberbal_state *state = space->machine().driver_data<cyberbal_state>();
+ if (ACCESSING_BITS_8_15)
+ {
+ state->m_sound_data_from_68k = (data >> 8) & 0xff;
+ state->m_sound_data_from_68k_ready = 1;
+ }
+}
+
+
+WRITE16_HANDLER( cyberbal_sound_68k_dac_w )
+{
+ cyberbal_state *state = space->machine().driver_data<cyberbal_state>();
+ device_t *dac = space->machine().device((offset & 8) ? "dac2" : "dac1");
+ dac_data_16_w(dac, (((data >> 3) & 0x800) | ((data >> 2) & 0x7ff)) << 4);
+
+ if (state->m_fast_68k_int)
+ {
+ state->m_fast_68k_int = 0;
+ update_sound_68k_interrupts(space->machine());
+ }
+}