trunk/src/mess/audio/wswan.c
| r31050 | r31051 | |
|---|
| 141 | 141 | { |
| 142 | 142 | left = right = 0; |
| 143 | 143 | |
| 144 | | if ( m_audio1.on ) { |
| 144 | if ( m_audio1.on ) |
| 145 | { |
| 145 | 146 | sample = m_audio1.signal; |
| 146 | 147 | m_audio1.pos++; |
| 147 | | if ( m_audio1.pos >= m_audio1.period / 2 ) { |
| 148 | if ( m_audio1.pos >= m_audio1.period / 2 ) |
| 149 | { |
| 148 | 150 | m_audio1.pos = 0; |
| 149 | 151 | m_audio1.signal = -m_audio1.signal; |
| 150 | 152 | } |
| r31050 | r31051 | |
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| 152 | 154 | right += m_audio1.vol_right * sample; |
| 153 | 155 | } |
| 154 | 156 | |
| 155 | | if ( m_audio2.on ) { |
| 156 | | if ( m_audio2_voice ) { |
| 157 | if ( m_audio2.on ) |
| 158 | { |
| 159 | if ( m_audio2_voice ) |
| 160 | { |
| 157 | 161 | left += (m_voice_data - 128)*(m_master_volume & 0x0f); |
| 158 | 162 | right += (m_voice_data - 128)*(m_master_volume & 0x0f); |
| 159 | | } else { |
| 163 | } |
| 164 | else |
| 165 | { |
| 160 | 166 | sample = m_audio2.signal; |
| 161 | 167 | m_audio2.pos++; |
| 162 | | if ( m_audio2.pos >= m_audio2.period / 2 ) { |
| 168 | if ( m_audio2.pos >= m_audio2.period / 2 ) |
| 169 | { |
| 163 | 170 | m_audio2.pos = 0; |
| 164 | 171 | m_audio2.signal = -m_audio2.signal; |
| 165 | 172 | } |
| r31050 | r31051 | |
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| 168 | 175 | } |
| 169 | 176 | } |
| 170 | 177 | |
| 171 | | if ( m_audio3.on ) { |
| 178 | if ( m_audio3.on ) |
| 179 | { |
| 172 | 180 | sample = m_audio3.signal; |
| 173 | 181 | m_audio3.pos++; |
| 174 | | if ( m_audio3.pos >= m_audio3.period / 2 ) { |
| 182 | if ( m_audio3.pos >= m_audio3.period / 2 ) |
| 183 | { |
| 175 | 184 | m_audio3.pos = 0; |
| 176 | 185 | m_audio3.signal = -m_audio3.signal; |
| 177 | 186 | } |
| 178 | | if ( m_audio3_sweep && m_sweep_time ) { |
| 187 | if ( m_audio3_sweep && m_sweep_time ) |
| 188 | { |
| 179 | 189 | m_sweep_count++; |
| 180 | | if ( m_sweep_count >= m_sweep_time ) { |
| 190 | if ( m_sweep_count >= m_sweep_time ) |
| 191 | { |
| 181 | 192 | m_sweep_count = 0; |
| 182 | 193 | m_audio3.freq += m_sweep_step; |
| 183 | 194 | m_audio3.period = machine().sample_rate() / (3072000 / ((2048 - (m_audio3.freq & 0x7ff)) << 5)); |
| r31050 | r31051 | |
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| 187 | 198 | right += m_audio3.vol_right * sample; |
| 188 | 199 | } |
| 189 | 200 | |
| 190 | | if ( m_audio4.on ) { |
| 191 | | if ( m_audio4_noise ) { |
| 201 | if ( m_audio4.on ) |
| 202 | { |
| 203 | if ( m_audio4_noise ) |
| 204 | { |
| 192 | 205 | sample = 0; |
| 193 | | } else { |
| 206 | } |
| 207 | else |
| 208 | { |
| 194 | 209 | sample = m_audio4.signal; |
| 195 | 210 | m_audio4.pos++; |
| 196 | | if ( m_audio4.pos >= m_audio4.period / 2 ) { |
| 211 | if ( m_audio4.pos >= m_audio4.period / 2 ) |
| 212 | { |
| 197 | 213 | m_audio4.pos = 0; |
| 198 | 214 | m_audio4.signal = -m_audio4.signal; |
| 199 | 215 | } |
| r31050 | r31051 | |
|---|
| 222 | 238 | { |
| 223 | 239 | m_channel->update(); |
| 224 | 240 | |
| 225 | | switch( offset ) { |
| 226 | | case 0x80: /* Audio 1 freq (lo) */ |
| 227 | | wswan_ch_set_freq(&m_audio1, (m_audio1.freq & 0xff00) | data); |
| 228 | | break; |
| 229 | | case 0x81: /* Audio 1 freq (hi) */ |
| 230 | | wswan_ch_set_freq(&m_audio1, (data << 8 ) | (m_audio1.freq & 0x00ff)); |
| 231 | | break; |
| 232 | | case 0x82: /* Audio 2 freq (lo) */ |
| 233 | | wswan_ch_set_freq(&m_audio2, (m_audio2.freq & 0xff00) | data); |
| 234 | | break; |
| 235 | | case 0x83: /* Audio 2 freq (hi) */ |
| 236 | | wswan_ch_set_freq(&m_audio2, (data << 8 ) | (m_audio2.freq & 0x00ff)); |
| 237 | | break; |
| 238 | | case 0x84: /* Audio 3 freq (lo) */ |
| 239 | | wswan_ch_set_freq(&m_audio3, (m_audio3.freq & 0xff00) | data); |
| 240 | | break; |
| 241 | | case 0x85: /* Audio 3 freq (hi) */ |
| 242 | | wswan_ch_set_freq(&m_audio3, (data << 8) | (m_audio3.freq & 0x00ff)); |
| 243 | | break; |
| 244 | | case 0x86: /* Audio 4 freq (lo) */ |
| 245 | | wswan_ch_set_freq(&m_audio4, (m_audio4.freq & 0xff00) | data); |
| 246 | | break; |
| 247 | | case 0x87: /* Audio 4 freq (hi) */ |
| 248 | | wswan_ch_set_freq(&m_audio4, (data << 8) | (m_audio4.freq & 0x00ff)); |
| 249 | | break; |
| 250 | | case 0x88: /* Audio 1 volume */ |
| 251 | | m_audio1.vol_left = ( data & 0xF0 ) >> 4; |
| 252 | | m_audio1.vol_right = data & 0x0F; |
| 253 | | break; |
| 254 | | case 0x89: /* Audio 2 volume */ |
| 255 | | m_voice_data = data; |
| 256 | | m_audio2.vol_left = ( data & 0xF0 ) >> 4; |
| 257 | | m_audio2.vol_right = data & 0x0F; |
| 258 | | break; |
| 259 | | case 0x8A: /* Audio 3 volume */ |
| 260 | | m_audio3.vol_left = ( data & 0xF0 ) >> 4; |
| 261 | | m_audio3.vol_right = data & 0x0F; |
| 262 | | break; |
| 263 | | case 0x8B: /* Audio 4 volume */ |
| 264 | | m_audio4.vol_left = ( data & 0xF0 ) >> 4; |
| 265 | | m_audio4.vol_right = data & 0x0F; |
| 266 | | break; |
| 267 | | case 0x8C: /* Sweep step */ |
| 268 | | m_sweep_step = (INT8)data; |
| 269 | | break; |
| 270 | | case 0x8D: /* Sweep time */ |
| 271 | | m_sweep_time = space.machine().sample_rate() / ( 3072000 / ( 8192 * (data + 1) ) ); |
| 272 | | break; |
| 273 | | case 0x8E: /* Noise control */ |
| 274 | | m_noise_type = data & 0x07; |
| 275 | | m_noise_reset = ( data & 0x08 ) >> 3; |
| 276 | | m_noise_enable = ( data & 0x10 ) >> 4; |
| 277 | | break; |
| 278 | | case 0x8F: /* Sample location */ |
| 279 | | m_sample_address = data << 6; |
| 280 | | break; |
| 281 | | case 0x90: /* Audio control */ |
| 282 | | m_audio1.on = data & 0x01; |
| 283 | | m_audio2.on = ( data & 0x02 ) >> 1; |
| 284 | | m_audio3.on = ( data & 0x04 ) >> 2; |
| 285 | | m_audio4.on = ( data & 0x08 ) >> 3; |
| 286 | | m_audio2_voice = ( data & 0x20 ) >> 5; |
| 287 | | m_audio3_sweep = ( data & 0x40 ) >> 6; |
| 288 | | m_audio4_noise = ( data & 0x80 ) >> 7; |
| 289 | | break; |
| 290 | | case 0x91: /* Audio output */ |
| 291 | | m_mono = data & 0x01; |
| 292 | | m_output_volume = ( data & 0x06 ) >> 1; |
| 293 | | m_external_stereo = ( data & 0x08 ) >> 3; |
| 294 | | m_external_speaker = 1; |
| 295 | | break; |
| 296 | | case 0x92: /* Noise counter shift register (lo) */ |
| 297 | | m_noise_shift = ( m_noise_shift & 0xFF00 ) | data; |
| 298 | | break; |
| 299 | | case 0x93: /* Noise counter shift register (hi) */ |
| 300 | | m_noise_shift = ( data << 8 ) | ( m_noise_shift & 0x00FF ); |
| 301 | | break; |
| 302 | | case 0x94: /* Master volume */ |
| 303 | | m_master_volume = data; |
| 304 | | break; |
| 241 | switch( offset ) |
| 242 | { |
| 243 | case 0x80: /* Audio 1 freq (lo) */ |
| 244 | wswan_ch_set_freq(&m_audio1, (m_audio1.freq & 0xff00) | data); |
| 245 | break; |
| 246 | |
| 247 | case 0x81: /* Audio 1 freq (hi) */ |
| 248 | wswan_ch_set_freq(&m_audio1, (data << 8 ) | (m_audio1.freq & 0x00ff)); |
| 249 | break; |
| 250 | |
| 251 | case 0x82: /* Audio 2 freq (lo) */ |
| 252 | wswan_ch_set_freq(&m_audio2, (m_audio2.freq & 0xff00) | data); |
| 253 | break; |
| 254 | |
| 255 | case 0x83: /* Audio 2 freq (hi) */ |
| 256 | wswan_ch_set_freq(&m_audio2, (data << 8 ) | (m_audio2.freq & 0x00ff)); |
| 257 | break; |
| 258 | |
| 259 | case 0x84: /* Audio 3 freq (lo) */ |
| 260 | wswan_ch_set_freq(&m_audio3, (m_audio3.freq & 0xff00) | data); |
| 261 | break; |
| 262 | |
| 263 | case 0x85: /* Audio 3 freq (hi) */ |
| 264 | wswan_ch_set_freq(&m_audio3, (data << 8) | (m_audio3.freq & 0x00ff)); |
| 265 | break; |
| 266 | |
| 267 | case 0x86: /* Audio 4 freq (lo) */ |
| 268 | wswan_ch_set_freq(&m_audio4, (m_audio4.freq & 0xff00) | data); |
| 269 | break; |
| 270 | |
| 271 | case 0x87: /* Audio 4 freq (hi) */ |
| 272 | wswan_ch_set_freq(&m_audio4, (data << 8) | (m_audio4.freq & 0x00ff)); |
| 273 | break; |
| 274 | |
| 275 | case 0x88: /* Audio 1 volume */ |
| 276 | m_audio1.vol_left = ( data & 0xF0 ) >> 4; |
| 277 | m_audio1.vol_right = data & 0x0F; |
| 278 | break; |
| 279 | |
| 280 | case 0x89: /* Audio 2 volume */ |
| 281 | m_voice_data = data; |
| 282 | m_audio2.vol_left = ( data & 0xF0 ) >> 4; |
| 283 | m_audio2.vol_right = data & 0x0F; |
| 284 | break; |
| 285 | |
| 286 | case 0x8A: /* Audio 3 volume */ |
| 287 | m_audio3.vol_left = ( data & 0xF0 ) >> 4; |
| 288 | m_audio3.vol_right = data & 0x0F; |
| 289 | break; |
| 290 | |
| 291 | case 0x8B: /* Audio 4 volume */ |
| 292 | m_audio4.vol_left = ( data & 0xF0 ) >> 4; |
| 293 | m_audio4.vol_right = data & 0x0F; |
| 294 | break; |
| 295 | |
| 296 | case 0x8C: /* Sweep step */ |
| 297 | m_sweep_step = (INT8)data; |
| 298 | break; |
| 299 | |
| 300 | case 0x8D: /* Sweep time */ |
| 301 | m_sweep_time = space.machine().sample_rate() / ( 3072000 / ( 8192 * (data + 1) ) ); |
| 302 | break; |
| 303 | |
| 304 | case 0x8E: /* Noise control */ |
| 305 | m_noise_type = data & 0x07; |
| 306 | m_noise_reset = ( data & 0x08 ) >> 3; |
| 307 | m_noise_enable = ( data & 0x10 ) >> 4; |
| 308 | break; |
| 309 | |
| 310 | case 0x8F: /* Sample location */ |
| 311 | m_sample_address = data << 6; |
| 312 | break; |
| 313 | |
| 314 | case 0x90: /* Audio control */ |
| 315 | m_audio1.on = data & 0x01; |
| 316 | m_audio2.on = ( data & 0x02 ) >> 1; |
| 317 | m_audio3.on = ( data & 0x04 ) >> 2; |
| 318 | m_audio4.on = ( data & 0x08 ) >> 3; |
| 319 | m_audio2_voice = ( data & 0x20 ) >> 5; |
| 320 | m_audio3_sweep = ( data & 0x40 ) >> 6; |
| 321 | m_audio4_noise = ( data & 0x80 ) >> 7; |
| 322 | break; |
| 323 | |
| 324 | case 0x91: /* Audio output */ |
| 325 | m_mono = data & 0x01; |
| 326 | m_output_volume = ( data & 0x06 ) >> 1; |
| 327 | m_external_stereo = ( data & 0x08 ) >> 3; |
| 328 | m_external_speaker = 1; |
| 329 | break; |
| 330 | |
| 331 | case 0x92: /* Noise counter shift register (lo) */ |
| 332 | m_noise_shift = ( m_noise_shift & 0xFF00 ) | data; |
| 333 | break; |
| 334 | |
| 335 | case 0x93: /* Noise counter shift register (hi) */ |
| 336 | m_noise_shift = ( data << 8 ) | ( m_noise_shift & 0x00FF ); |
| 337 | break; |
| 338 | |
| 339 | case 0x94: /* Master volume */ |
| 340 | m_master_volume = data; |
| 341 | break; |
| 305 | 342 | } |
| 306 | 343 | } |