/*************************************************************************** -= Seta Hardware =- driver by Luca Elia (l.elia@tin.it) rewrite by Manbow-J(manbowj@hamal.freemail.ne.jp) X1-010 Seta Custom Sound Chip (80 Pin PQFP) Custom programmed Mitsubishi M60016 Gate Array, 3608 gates, 148 Max I/O ports The X1-010 is 16 Voices sound generator, each channel gets it's waveform from RAM (128 bytes per waveform, 8 bit unsigned data) or sampling PCM(8bit unsigned data). Registers: 8 registers per channel (mapped to the lower bytes of 16 words on the 68K) Reg: Bits: Meaning: 0 7654 3--- ---- -2-- PCM/Waveform repeat flag (0:Ones 1:Repeat) (*1) ---- --1- Sound out select (0:PCM 1:Waveform) ---- ---0 Key on / off 1 7654 ---- PCM Volume 1 (L?) ---- 3210 PCM Volume 2 (R?) Waveform No. 2 PCM Frequency Waveform Pitch Lo 3 Waveform Pitch Hi 4 PCM Sample Start / 0x1000 [Start/End in bytes] Waveform Envelope Time 5 PCM Sample End 0x100 - (Sample End / 0x1000) [PCM ROM is Max 1MB?] Waveform Envelope No. 6 Reserved 7 Reserved offset 0x0000 - 0x0fff Wave form data offset 0x1000 - 0x1fff Envelope data *1 : when 0 is specified, hardware interrupt is caused(allways return soon) Hardcoded Values: PCM ROM region: REGION_SOUND1 ***************************************************************************/ #include "sndintrf.h" #include "streams.h" #include "x1_010.h" #define LOG_SOUND 0 #define SETA_NUM_CHANNELS 16 #define LOG_REGISTER_WRITE 0 #define LOG_REGISTER_READ 0 #define FREQ_BASE_BITS 8 // Frequency fixed decimal shift bits #define ENV_BASE_BITS 16 // wave form envelope fixed decimal shift bits #define VOL_BASE (2*32*256/30) // Volume base /* this structure defines the parameters for a channel */ typedef struct { unsigned char status; unsigned char volume; // volume / wave form no. unsigned char frequency; // frequency / pitch lo unsigned char pitch_hi; // reserved / pitch hi unsigned char start; // start address / envelope time unsigned char end; // end address / envelope no. unsigned char reserve[2]; } X1_010_CHANNEL; struct x1_010_info { /* Variables only used here */ int rate; // Output sampling rate (Hz) sound_stream * stream; // Stream handle int address; // address eor data int sound_enable; // sound output enable/disable UINT8 reg[0x2000]; // X1-010 Register & wave form area UINT8 HI_WORD_BUF[0x2000]; // X1-010 16bit access ram check avoidance work UINT32 smp_offset[SETA_NUM_CHANNELS]; UINT32 env_offset[SETA_NUM_CHANNELS]; UINT32 base_clock; }; /* mixer tables and internal buffers */ //static short *mixer_buffer = NULL; /*-------------------------------------------------------------- generate sound to the mix buffer --------------------------------------------------------------*/ static void seta_update( void *param, stream_sample_t **inputs, stream_sample_t **buffer, int length ) { struct x1_010_info *info = param; X1_010_CHANNEL *reg; int ch, i, volL, volR, freq; register INT8 *start, *end, data; register UINT8 *env; register UINT32 smp_offs, smp_step, env_offs, env_step, delta; // mixer buffer zero clear memset( buffer[0], 0, length*sizeof(*buffer[0]) ); memset( buffer[1], 0, length*sizeof(*buffer[1]) ); // if( info->sound_enable == 0 ) return; for( ch = 0; ch < SETA_NUM_CHANNELS; ch++ ) { reg = (X1_010_CHANNEL *)&(info->reg[ch*sizeof(X1_010_CHANNEL)]); if( (reg->status&1) != 0 ) { // Key On stream_sample_t *bufL = buffer[0]; stream_sample_t *bufR = buffer[1]; if( (reg->status&2) == 0 ) { // PCM sampling start = (INT8 *)(reg->start *0x1000+memory_region(REGION_SOUND1)); end = (INT8 *)((0x100-reg->end)*0x1000+memory_region(REGION_SOUND1)); volL = ((reg->volume>>4)&0xf)*VOL_BASE; volR = ((reg->volume>>0)&0xf)*VOL_BASE; smp_offs = info->smp_offset[ch]; freq = reg->frequency&0x1f; // Meta Fox does not write the frequency register. Ever if( freq == 0 ) freq = 4; smp_step = (UINT32)((float)info->base_clock/8192.0 *freq*(1<rate); #if LOG_SOUND if( smp_offs == 0 ) { logerror( "Play sample %06X - %06X, channel %X volume %d freq %X step %X offset %X\n", start, end, ch, vol, freq, smp_step, smp_offs ); } #endif for( i = 0; i < length; i++ ) { delta = smp_offs>>FREQ_BASE_BITS; // sample ended? if( start+delta >= end ) { reg->status &= 0xfe; // Key off break; } data = *(start+delta); *bufL++ += (data*volL/256); *bufR++ += (data*volR/256); smp_offs += smp_step; } info->smp_offset[ch] = smp_offs; } else { // Wave form start = (INT8 *)&(info->reg[reg->volume*128+0x1000]); smp_offs = info->smp_offset[ch]; freq = (reg->pitch_hi<<8)+reg->frequency; smp_step = (UINT32)((float)info->base_clock/128.0/1024.0/4.0*freq*(1<rate); env = (UINT8 *)&(info->reg[reg->end*128]); env_offs = info->env_offset[ch]; env_step = (UINT32)((float)info->base_clock/128.0/1024.0/4.0*reg->start*(1<rate); #if LOG_SOUND /* Print some more debug info */ if( smp_offs == 0 ) { logerror( "Play waveform %X, channel %X volume %X freq %4X step %X offset %X\n", reg->volume, ch, reg->end, freq, smp_step, smp_offs ); } #endif for( i = 0; i < length; i++ ) { int vol; delta = env_offs>>ENV_BASE_BITS; // Envelope one shot mode if( (reg->status&4) != 0 && delta >= 0x80 ) { reg->status &= 0xfe; // Key off break; } vol = *(env+(delta&0x7f)); volL = ((vol>>4)&0xf)*VOL_BASE; volR = ((vol>>0)&0xf)*VOL_BASE; data = *(start+((smp_offs>>FREQ_BASE_BITS)&0x7f)); *bufL++ += (data*volL/256); *bufR++ += (data*volR/256); smp_offs += smp_step; env_offs += env_step; } info->smp_offset[ch] = smp_offs; info->env_offset[ch] = env_offs; } } } } static void *x1_010_start(int sndindex, int clock, const void *config) { int i; const struct x1_010_interface *intf = config; struct x1_010_info *info; info = auto_malloc(sizeof(*info)); memset(info, 0, sizeof(*info)); info->base_clock = clock; info->rate = clock / 1024; info->address = intf->adr; for( i = 0; i < SETA_NUM_CHANNELS; i++ ) { info->smp_offset[i] = 0; info->env_offset[i] = 0; } #if LOG_SOUND /* Print some more debug info */ logerror("masterclock = %d rate = %d\n", master_clock, info->rate ); #endif /* get stream channels */ info->stream = stream_create(0,2,info->rate,info,seta_update); return info; } void seta_sound_enable_w(int data) { struct x1_010_info *info = sndti_token(SOUND_X1_010, 0); info->sound_enable = data; } /* Use these for 8 bit CPUs */ READ8_HANDLER( seta_sound_r ) { struct x1_010_info *info = sndti_token(SOUND_X1_010, 0); offset ^= info->address; return info->reg[offset]; } WRITE8_HANDLER( seta_sound_w ) { struct x1_010_info *info = sndti_token(SOUND_X1_010, 0); int channel, reg; offset ^= info->address; channel = offset/sizeof(X1_010_CHANNEL); reg = offset%sizeof(X1_010_CHANNEL); if( channel < SETA_NUM_CHANNELS && reg == 0 && (info->reg[offset]&1) == 0 && (data&1) != 0 ) { info->smp_offset[channel] = 0; info->env_offset[channel] = 0; } #if LOG_REGISTER_WRITE logerror("PC: %06X : offset %6X : data %2X\n", activecpu_get_pc(), offset, data ); #endif info->reg[offset] = data; } /* Use these for 16 bit CPUs */ READ16_HANDLER( seta_sound_word_r ) { struct x1_010_info *info = sndti_token(SOUND_X1_010, 0); UINT16 ret; ret = info->HI_WORD_BUF[offset]<<8; ret += (seta_sound_r( offset )&0xff); #if LOG_REGISTER_READ logerror( "Read X1-010 PC:%06X Offset:%04X Data:%04X\n", activecpu_get_pc(), offset, ret ); #endif return ret; } WRITE16_HANDLER( seta_sound_word_w ) { struct x1_010_info *info = sndti_token(SOUND_X1_010, 0); info->HI_WORD_BUF[offset] = (data>>8)&0xff; seta_sound_w( offset, data&0xff ); #if LOG_REGISTER_WRITE logerror( "Write X1-010 PC:%06X Offset:%04X Data:%04X\n", activecpu_get_pc(), offset, data ); #endif } /************************************************************************** * Generic get_info **************************************************************************/ static void x1_010_set_info(void *token, UINT32 state, sndinfo *info) { switch (state) { /* no parameters to set */ } } void x1_010_get_info(void *token, UINT32 state, sndinfo *info) { switch (state) { /* --- the following bits of info are returned as 64-bit signed integers --- */ /* --- the following bits of info are returned as pointers to data or functions --- */ case SNDINFO_PTR_SET_INFO: info->set_info = x1_010_set_info; break; case SNDINFO_PTR_START: info->start = x1_010_start; break; case SNDINFO_PTR_STOP: /* Nothing */ break; case SNDINFO_PTR_RESET: /* Nothing */ break; /* --- the following bits of info are returned as NULL-terminated strings --- */ case SNDINFO_STR_NAME: info->s = "X1-010"; break; case SNDINFO_STR_CORE_FAMILY: info->s = "Seta custom"; break; case SNDINFO_STR_CORE_VERSION: info->s = "1.0"; break; case SNDINFO_STR_CORE_FILE: info->s = __FILE__; break; case SNDINFO_STR_CORE_CREDITS: info->s = "Copyright (c) 2004, The MAME Team"; break; } }