diff options
Diffstat (limited to 'src/mame/audio/aztarac.c')
-rw-r--r-- | src/mame/audio/aztarac.c | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/src/mame/audio/aztarac.c b/src/mame/audio/aztarac.c new file mode 100644 index 00000000000..951d9b00986 --- /dev/null +++ b/src/mame/audio/aztarac.c @@ -0,0 +1,55 @@ +/*************************************************************************** + + Centuri Aztarac hardware + +***************************************************************************/ + +#include "driver.h" +#include "cpu/z80/z80.h" +#include "aztarac.h" + +static int sound_status; + +READ16_HANDLER( aztarac_sound_r ) +{ + return sound_status & 0x01; +} + +WRITE16_HANDLER( aztarac_sound_w ) +{ + if (ACCESSING_LSB) + { + data &= 0xff; + soundlatch_w(offset, data); + sound_status ^= 0x21; + if (sound_status & 0x20) + cpunum_set_input_line(1, 0, HOLD_LINE); + } +} + +READ8_HANDLER( aztarac_snd_command_r ) +{ + sound_status |= 0x01; + sound_status &= ~0x20; + return soundlatch_r(offset); +} + +READ8_HANDLER( aztarac_snd_status_r ) +{ + return sound_status & ~0x01; +} + +WRITE8_HANDLER( aztarac_snd_status_w ) +{ + sound_status &= ~0x10; +} + +INTERRUPT_GEN( aztarac_snd_timed_irq ) +{ + sound_status ^= 0x10; + + if (sound_status & 0x10) + cpunum_set_input_line(1,0,HOLD_LINE); +} + + |