diff options
Diffstat (limited to 'src/mame/audio/xavix.cpp')
-rw-r--r-- | src/mame/audio/xavix.cpp | 265 |
1 files changed, 177 insertions, 88 deletions
diff --git a/src/mame/audio/xavix.cpp b/src/mame/audio/xavix.cpp index 5d051808cdb..b6497d69819 100644 --- a/src/mame/audio/xavix.cpp +++ b/src/mame/audio/xavix.cpp @@ -4,153 +4,255 @@ #include "emu.h" #include "includes/xavix.h" -// #define VERBOSE 1 +#define VERBOSE 1 #include "logmacro.h" -// 16 channel sound? +// 16 stereo channels? -READ8_MEMBER(xavix_state::sound_75f0_r) -{ - // something? (same as 75f1) 1 bit per channel, 8 channels - LOG("%s: sound_75f0_r\n", machine().describe_context()); - return m_soundregs[0]; -} +// xavix_sound_device -READ8_MEMBER(xavix_state::sound_75f1_r) -{ - // something? (same as 75f0) 1 bit per channel, 8 channels - LOG("%s: sound_75f1_r\n", machine().describe_context()); - return m_soundregs[1]; -} +DEFINE_DEVICE_TYPE(XAVIX_SOUND, xavix_sound_device, "xavix_sound", "XaviX Sound") -READ8_MEMBER(xavix_state::sound_75f6_r) +xavix_sound_device::xavix_sound_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) + : device_t(mconfig, XAVIX_SOUND, tag, owner, clock) + , device_sound_interface(mconfig, *this) + , m_stream(nullptr) { - LOG("%s: sound_75f6_r\n", machine().describe_context()); - return m_soundregs[6]; } -READ8_MEMBER(xavix_state::sound_75f8_r) +void xavix_sound_device::device_start() { - LOG("%s: sound_75f8_r\n", machine().describe_context()); - return m_soundregs[8]; + m_stream = stream_alloc(0, 1, 8000); } -READ8_MEMBER(xavix_state::sound_75f9_r) +void xavix_sound_device::device_reset() { - LOG("%s: sound_75f9_r\n", machine().describe_context()); - return 0x00; } -READ8_MEMBER(xavix_state::sound_75fa_r) +void xavix_sound_device::sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples) { - LOG("%s: sound_75fa_r\n", machine().describe_context()); - return m_soundregs[10]; -} + // reset the output stream + memset(outputs[0], 0, samples * sizeof(*outputs[0])); -READ8_MEMBER(xavix_state::sound_75fb_r) -{ - LOG("%s: sound_75fb_r\n", machine().describe_context()); - return m_soundregs[11]; + // loop while we still have samples to generate + while (samples-- != 0) + { + // + } } -READ8_MEMBER(xavix_state::sound_75fc_r) +// xavix_state support + +/* 75f0, 75f1 - 2x8 bits (16 channels?) */ +READ8_MEMBER(xavix_state::sound_reg16_0_r) { - LOG("%s: sound_75fc_r\n", machine().describe_context()); - return m_soundregs[12]; + LOG("%s: sound_reg16_0_r %02x\n", machine().describe_context(), offset); + return m_soundreg16_0[offset]; } -READ8_MEMBER(xavix_state::sound_75fd_r) +WRITE8_MEMBER(xavix_state::sound_reg16_0_w) { - LOG("%s: sound_75fd_r\n", machine().describe_context()); - return m_soundregs[13]; -} + /* looks like the sound triggers + + offset 0 + data & 0x01 - channel 0 (registers at regbase + 0x00) eg 0x3b00 - 0x3b0f in monster truck + data & 0x02 - channel 1 (registers at regbase + 0x10) eg 0x3b10 - 0x3b1f in monster truck + data & 0x04 - channel 2 + data & 0x08 - channel 3 + data & 0x10 - channel 4 + data & 0x20 - channel 5 + data & 0x40 - channel 6 + data & 0x80 - channel 7 + + offset 1 + data & 0x01 - channel 8 + data & 0x02 - channel 9 + data & 0x04 - channel 10 + data & 0x08 - channel 11 + data & 0x10 - channel 12 + data & 0x20 - channel 13 + data & 0x40 - channel 14 (registers at regbase + 0xf0) eg 0x3be0 - 0x3bef in monster truck + data & 0x80 - channel 15 (registers at regbase + 0xf0) eg 0x3bf0 - 0x3bff in monster truck +*/ + if (offset == 0) + LOG("%s: sound_reg16_0_w %02x, %02x (%d %d %d %d %d %d %d %d - - - - - - - -)\n", machine().describe_context(), offset, data, (data & 0x01) ? 1 : 0, (data & 0x02) ? 1 : 0, (data & 0x04) ? 1 : 0, (data & 0x08) ? 1 : 0, (data & 0x10) ? 1 : 0, (data & 0x20) ? 1 : 0, (data & 0x40) ? 1 : 0, (data & 0x80) ? 1 : 0); + else + LOG("%s: sound_reg16_0_w %02x, %02x (- - - - - - - - %d %d %d %d %d %d %d %d)\n", machine().describe_context(), offset, data, (data & 0x01) ? 1 : 0, (data & 0x02) ? 1 : 0, (data & 0x04) ? 1 : 0, (data & 0x08) ? 1 : 0, (data & 0x10) ? 1 : 0, (data & 0x20) ? 1 : 0, (data & 0x40) ? 1 : 0, (data & 0x80) ? 1 : 0); + + + for (int i = 0; i < 8; i++) + { + int channel_state = (data & (1 << i)); + int old_channel_state = (m_soundreg16_0[offset] & (1 << i)); + if (channel_state != old_channel_state) + { + if (channel_state) + { + int channel = (offset * 8 + i); + LOG("channel %d 0->1 ", channel); + uint16_t memorybase = ((m_sound_regbase & 0x3f) << 8) | (channel * 0x10); + uint16_t param1 = (m_mainram[memorybase + 0x1] << 8) | (m_mainram[memorybase + 0x0]); // sample rate maybe? + uint16_t param2 = (m_mainram[memorybase + 0x3] << 8) | (m_mainram[memorybase + 0x2]); // seems to be a start position + uint16_t param3 = (m_mainram[memorybase + 0x5] << 8) | (m_mainram[memorybase + 0x4]); // another start position? sometimes same as param6 + uint8_t param4a = (m_mainram[memorybase + 0x7]); + uint8_t param4b = (m_mainram[memorybase + 0x6]); // upper 8 bits of memory address? 8 bits unused? -WRITE8_MEMBER(xavix_state::sound_75f0_w) -{ - // something? (same as 75f1) 1 bit per channel, 8 channels + // these don't seem to be populated as often, maybe some kind of effect / envelope filter? + uint8_t param5a = (m_mainram[memorybase + 0x9]); + uint8_t param5b = (m_mainram[memorybase + 0x8]); + uint16_t param6 = (m_mainram[memorybase + 0xb] << 8) | (m_mainram[memorybase + 0xa]); // seems to be a start position + uint16_t param7 = (m_mainram[memorybase + 0xd] << 8) | (m_mainram[memorybase + 0xc]); // another start position? sometimes same as param6 + uint8_t param8a = (m_mainram[memorybase + 0xf]); + uint8_t param8b = (m_mainram[memorybase + 0xe]); // upper 8 bits of memory address? 8 bits unused (or not unused?, get populated with increasing values sometimes?) + LOG(" (params %04x %04x %04x %02x %02x %02x %02x %04x %04x %02x %02x)\n", param1, param2, param3, param4a, param4b, param5a, param5b, param6, param7, param8a, param8b); + + uint32_t address1 = (param2 | param4b << 16) & 0x00ffffff; // definitely addresses based on rad_snow + uint32_t address2 = (param3 | param4b << 16) & 0x00ffffff; + + uint32_t address3 = (param6 | param8b << 16) & 0x00ffffff; // still looks like addresses, sometimes pointing at RAM + uint32_t address4 = (param7 | param8b << 16) & 0x00ffffff; + + + LOG(" (possible meanings mode %01x rate %04x address1 %08x address2 %08x address3 %08x address4 %08x)\n", param1 & 0x3, param1 >> 2, address1, address2, address3, address4); + + // samples appear to be PCM, 0x80 terminated + } + } + } + + m_soundreg16_0[offset] = data; - // expected to return data written - m_soundregs[0] = data; - LOG("%s: sound_75f0_w %02x\n", machine().describe_context(), data); } +/* 75f0, 75f1 - 2x8 bits (16 channels?) */ +READ8_MEMBER(xavix_state::sound_reg16_1_r) +{ + LOG("%s: sound_reg16_1_r %02x\n", machine().describe_context(), offset); + return m_soundreg16_1[offset]; +} -WRITE8_MEMBER(xavix_state::sound_75f1_w) +WRITE8_MEMBER(xavix_state::sound_reg16_1_w) { - // something? (same as 75f0) 1 bit per channel, 8 channels + m_soundreg16_1[offset] = data; - // expected to return data written - m_soundregs[1] = data; - LOG("%s: sound_75f1_w %02x\n", machine().describe_context(), data); + if (offset == 0) + LOG("%s: sound_reg16_1_w %02x, %02x (%d %d %d %d %d %d %d %d - - - - - - - -)\n", machine().describe_context(), offset, data, (data & 0x01) ? 1 : 0, (data & 0x02) ? 1 : 0, (data & 0x04) ? 1 : 0, (data & 0x08) ? 1 : 0, (data & 0x10) ? 1 : 0, (data & 0x20) ? 1 : 0, (data & 0x40) ? 1 : 0, (data & 0x80) ? 1 : 0); + else + LOG("%s: sound_reg16_1_w %02x, %02x (- - - - - - - - %d %d %d %d %d %d %d %d)\n", machine().describe_context(), offset, data, (data & 0x01) ? 1 : 0, (data & 0x02) ? 1 : 0, (data & 0x04) ? 1 : 0, (data & 0x08) ? 1 : 0, (data & 0x10) ? 1 : 0, (data & 0x20) ? 1 : 0, (data & 0x40) ? 1 : 0, (data & 0x80) ? 1 : 0); } -WRITE8_MEMBER(xavix_state::sound_75f6_w) +/* 75f4, 75f5 - 2x8 bits (16 channels?) status? */ +READ8_MEMBER(xavix_state::sound_sta16_r) +{ + // used with 75f0/75f1 + return machine().rand(); +} + +/* 75f6 - master volume control? */ +READ8_MEMBER(xavix_state::sound_volume_r) +{ + LOG("%s: sound_volume_r\n", machine().describe_context()); + return m_soundregs[6]; +} + +WRITE8_MEMBER(xavix_state::sound_volume_w) { - // expected to return data written m_soundregs[6] = data; - LOG("%s: sound_75f6_w %02x\n", machine().describe_context(), data); + LOG("%s: sound_volume_w %02x\n", machine().describe_context(), data); } -WRITE8_MEMBER(xavix_state::sound_75f7_w) +/* 75f7 - main register base*/ + +WRITE8_MEMBER(xavix_state::sound_regbase_w) { - m_soundregs[7] = data; - LOG("%s: sound_75f7_w %02x\n", machine().describe_context(), data); + // this is the upper 6 bits of the RAM address where the actual sound register sets are + // (16x16 regs, so complete 0x100 bytes of RAM eg 0x3b means the complete 0x3b00 - 0x3bff range with 0x3b00 - 0x3b0f being channel 1 etc) + m_sound_regbase = data; + LOG("%s: sound_regbase_w %02x (sound regs are at 0x%02x00 to 0x%02xff)\n", machine().describe_context(), data, m_sound_regbase & 0x3f, m_sound_regbase & 0x3f); } +/* 75f8, 75f9 - misc unknown sound regs*/ + +READ8_MEMBER(xavix_state::sound_75f8_r) +{ + LOG("%s: sound_75f8_r\n", machine().describe_context()); + return m_soundregs[8]; +} WRITE8_MEMBER(xavix_state::sound_75f8_w) { - // expected to return data written m_soundregs[8] = data; LOG("%s: sound_75f8_w %02x\n", machine().describe_context(), data); } +READ8_MEMBER(xavix_state::sound_75f9_r) +{ + LOG("%s: sound_75f9_r\n", machine().describe_context()); + return 0x00; +} + WRITE8_MEMBER(xavix_state::sound_75f9_w) { m_soundregs[9] = data; LOG("%s: sound_75f9_w %02x\n", machine().describe_context(), data); } -WRITE8_MEMBER(xavix_state::sound_75fa_w) +/* 75fa, 75fb, 75fc, 75fd - timers?? generate interrupts?? */ + +READ8_MEMBER(xavix_state::sound_timer0_r) { - // timer? frequency? reg 0 + LOG("%s: sound_timer0_r\n", machine().describe_context()); + return m_soundregs[10]; +} - // expected to return data written +WRITE8_MEMBER(xavix_state::sound_timer0_w) +{ m_soundregs[10] = data; - LOG("%s: sound_75fa_w %02x\n", machine().describe_context(), data); + LOG("%s: sound_timer0_w %02x\n", machine().describe_context(), data); } -WRITE8_MEMBER(xavix_state::sound_75fb_w) +READ8_MEMBER(xavix_state::sound_timer1_r) { - // timer? frequency? reg 1 + LOG("%s: sound_timer1_r\n", machine().describe_context()); + return m_soundregs[11]; +} - // expected to return data written +WRITE8_MEMBER(xavix_state::sound_timer1_w) +{ m_soundregs[11] = data; - LOG("%s: sound_75fb_w %02x\n", machine().describe_context(), data); + LOG("%s: sound_timer1_w %02x\n", machine().describe_context(), data); } -WRITE8_MEMBER(xavix_state::sound_75fc_w) +READ8_MEMBER(xavix_state::sound_timer2_r) { - // timer? frequency? reg 2 + LOG("%s: sound_timer2_r\n", machine().describe_context()); + return m_soundregs[12]; +} - // expected to return data written +WRITE8_MEMBER(xavix_state::sound_timer2_w) +{ m_soundregs[12] = data; - LOG("%s: sound_75fc_w %02x\n", machine().describe_context(), data); + LOG("%s: sound_timer2_w %02x\n", machine().describe_context(), data); } -WRITE8_MEMBER(xavix_state::sound_75fd_w) +READ8_MEMBER(xavix_state::sound_timer3_r) { - // timer? frequency? reg 3 + LOG("%s: sound_timer3_r\n", machine().describe_context()); + return m_soundregs[13]; +} - // expected to return data written +WRITE8_MEMBER(xavix_state::sound_timer3_w) +{ m_soundregs[13] = data; - LOG("%s: sound_75fd_w %02x\n", machine().describe_context(), data); + LOG("%s: sound_timer3_w %02x\n", machine().describe_context(), data); } +/* 75fe - some kind of IRQ status / Timer Status? */ + READ8_MEMBER(xavix_state::sound_irqstatus_r) { // rad_rh checks this after doing something that looks like an irq ack @@ -164,7 +266,7 @@ READ8_MEMBER(xavix_state::sound_irqstatus_r) WRITE8_MEMBER(xavix_state::sound_irqstatus_w) { // these look like irq ack bits, 4 sources? - // related to sound_75fa_w , sound_75fb_w, sound_75fc_w, sound_75fd_w ? + // related to sound_timer0_w , sound_timer1_w, sound_timer2_w, sound_timer3_w ? if (data & 0xf0) { m_sound_irqstatus &= ~data & 0xf0; @@ -175,24 +277,11 @@ WRITE8_MEMBER(xavix_state::sound_irqstatus_w) LOG("%s: sound_irqstatus_w %02x\n", machine().describe_context(), data); } + + WRITE8_MEMBER(xavix_state::sound_75ff_w) { m_soundregs[15] = data; LOG("%s: sound_75ff_w %02x\n", machine().describe_context(), data); } -READ8_MEMBER(xavix_state::sound_75f4_r) -{ - // status? 1 bit per channel, 8 channels? - - // used with 75f0 - return 0xff; -} - -READ8_MEMBER(xavix_state::sound_75f5_r) -{ - // status? 1 bit per channel, 8 channels? - - // used with 75f1 - return 0xff; -} |