From c33ec622d3e06518fbc01f5337208fb5eebcd6ac Mon Sep 17 00:00:00 2001 From: "R. Belmont" Date: Sat, 28 May 2011 15:05:03 +0000 Subject: [PATCH] ertictac/poizone: Greatly improved (not perfect) audio [R. Belmont, Heihachi_73] --- src/mame/drivers/ertictac.c | 16 ++++++------- src/mame/machine/archimds.c | 45 ++++++++++++++++++++++++++++++++----- 2 files changed, 48 insertions(+), 13 deletions(-) diff --git a/src/mame/drivers/ertictac.c b/src/mame/drivers/ertictac.c index bf5108ee4d4..f7b23e53269 100644 --- a/src/mame/drivers/ertictac.c +++ b/src/mame/drivers/ertictac.c @@ -241,28 +241,28 @@ static MACHINE_CONFIG_START( ertictac, ertictac_state ) MCFG_SPEAKER_STANDARD_MONO("mono") MCFG_SOUND_ADD("dac0", DAC, 0) - MCFG_SOUND_ROUTE(0, "mono", 0.10) + MCFG_SOUND_ROUTE(0, "mono", 0.05) MCFG_SOUND_ADD("dac1", DAC, 0) - MCFG_SOUND_ROUTE(0, "mono", 0.10) + MCFG_SOUND_ROUTE(0, "mono", 0.05) MCFG_SOUND_ADD("dac2", DAC, 0) - MCFG_SOUND_ROUTE(0, "mono", 0.10) + MCFG_SOUND_ROUTE(0, "mono", 0.05) MCFG_SOUND_ADD("dac3", DAC, 0) - MCFG_SOUND_ROUTE(0, "mono", 0.10) + MCFG_SOUND_ROUTE(0, "mono", 0.05) MCFG_SOUND_ADD("dac4", DAC, 0) - MCFG_SOUND_ROUTE(0, "mono", 0.10) + MCFG_SOUND_ROUTE(0, "mono", 0.05) MCFG_SOUND_ADD("dac5", DAC, 0) - MCFG_SOUND_ROUTE(0, "mono", 0.10) + MCFG_SOUND_ROUTE(0, "mono", 0.05) MCFG_SOUND_ADD("dac6", DAC, 0) - MCFG_SOUND_ROUTE(0, "mono", 0.10) + MCFG_SOUND_ROUTE(0, "mono", 0.05) MCFG_SOUND_ADD("dac7", DAC, 0) - MCFG_SOUND_ROUTE(0, "mono", 0.10) + MCFG_SOUND_ROUTE(0, "mono", 0.05) MACHINE_CONFIG_END ROM_START( ertictac ) diff --git a/src/mame/machine/archimds.c b/src/mame/machine/archimds.c index f9f3e5807bd..4caa4628a4f 100644 --- a/src/mame/machine/archimds.c +++ b/src/mame/machine/archimds.c @@ -141,16 +141,51 @@ static TIMER_CALLBACK( vidc_audio_tick ) INT16 res; UINT8 ch; static const char *const dac_port[8] = { "dac0", "dac1", "dac2", "dac3", "dac4", "dac5", "dac6", "dac7" }; + static const INT16 mulawTable[256] = + { + -32124,-31100,-30076,-29052,-28028,-27004,-25980,-24956, + -23932,-22908,-21884,-20860,-19836,-18812,-17788,-16764, + -15996,-15484,-14972,-14460,-13948,-13436,-12924,-12412, + -11900,-11388,-10876,-10364, -9852, -9340, -8828, -8316, + -7932, -7676, -7420, -7164, -6908, -6652, -6396, -6140, + -5884, -5628, -5372, -5116, -4860, -4604, -4348, -4092, + -3900, -3772, -3644, -3516, -3388, -3260, -3132, -3004, + -2876, -2748, -2620, -2492, -2364, -2236, -2108, -1980, + -1884, -1820, -1756, -1692, -1628, -1564, -1500, -1436, + -1372, -1308, -1244, -1180, -1116, -1052, -988, -924, + -876, -844, -812, -780, -748, -716, -684, -652, + -620, -588, -556, -524, -492, -460, -428, -396, + -372, -356, -340, -324, -308, -292, -276, -260, + -244, -228, -212, -196, -180, -164, -148, -132, + -120, -112, -104, -96, -88, -80, -72, -64, + -56, -48, -40, -32, -24, -16, -8, -1, + 32124, 31100, 30076, 29052, 28028, 27004, 25980, 24956, + 23932, 22908, 21884, 20860, 19836, 18812, 17788, 16764, + 15996, 15484, 14972, 14460, 13948, 13436, 12924, 12412, + 11900, 11388, 10876, 10364, 9852, 9340, 8828, 8316, + 7932, 7676, 7420, 7164, 6908, 6652, 6396, 6140, + 5884, 5628, 5372, 5116, 4860, 4604, 4348, 4092, + 3900, 3772, 3644, 3516, 3388, 3260, 3132, 3004, + 2876, 2748, 2620, 2492, 2364, 2236, 2108, 1980, + 1884, 1820, 1756, 1692, 1628, 1564, 1500, 1436, + 1372, 1308, 1244, 1180, 1116, 1052, 988, 924, + 876, 844, 812, 780, 748, 716, 684, 652, + 620, 588, 556, 524, 492, 460, 428, 396, + 372, 356, 340, 324, 308, 292, 276, 260, + 244, 228, 212, 196, 180, 164, 148, 132, + 120, 112, 104, 96, 88, 80, 72, 64, + 56, 48, 40, 32, 24, 16, 8, 0 + }; for(ch=0;ch<8;ch++) { - ulaw_comp = (space->read_byte(vidc_sndstart+vidc_sndcur + ch)); + UINT8 ulaw_temp = (space->read_byte(vidc_sndstart+vidc_sndcur + ch)) ^ 0xff; - res=1<<((ulaw_comp>>5)+4); - res+=(((ulaw_comp>>1)&0xF)<<(ulaw_comp>>5)); - if (ulaw_comp&1) res=-res; + ulaw_comp = (ulaw_temp>>1) | ((ulaw_temp&1)<<7); - dac_signed_data_16_w(space->machine().device(dac_port[ch & 7]), res); + res = mulawTable[ulaw_comp]; + + dac_signed_data_16_w(space->machine().device(dac_port[ch & 7]), res^0x8000); } vidc_sndcur+=8;