diff options
Diffstat (limited to 'src/mame/audio/suna8.c')
-rw-r--r-- | src/mame/audio/suna8.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/src/mame/audio/suna8.c b/src/mame/audio/suna8.c new file mode 100644 index 00000000000..b47a9d43abc --- /dev/null +++ b/src/mame/audio/suna8.c @@ -0,0 +1,45 @@ +/* + + SunA 8 Bit Games samples + + Format: PCM unsigned 8 bit mono 4Khz + +*/ + +#include "driver.h" +#include "sound/samples.h" + +static INT16 *samplebuf; +static int sample; + +WRITE8_HANDLER( suna8_play_samples_w ) +{ + if( data ) + { + if( ~data & 0x10 ) + { + sample_start_raw(0, &samplebuf[0x800*sample], 0x0800, 4000, 0); + } + else if( ~data & 0x08 ) + { + sample &= 3; + sample_start_raw(0, &samplebuf[0x800*(sample+7)], 0x0800, 4000, 0); + } + } +} + +WRITE8_HANDLER( suna8_samples_number_w ) +{ + sample = data & 0xf; +} + +void suna8_sh_start(void) +{ + int i; + UINT8 *ROM = memory_region(REGION_SOUND1); + + samplebuf = auto_malloc(memory_region_length(REGION_SOUND1) * sizeof(samplebuf[0])); + + for(i=0;i<memory_region_length(REGION_SOUND1);i++) + samplebuf[i] = (INT8)(ROM[i] ^ 0x80) * 256; +} |