mirror of
https://github.com/ekeeke/Genesis-Plus-GX.git
synced 2024-12-27 03:31:49 +01:00
added YM2413 emulation in Master System compatibility mode
This commit is contained in:
ekeeke31
parent
b6bc325353
commit
d0eab7d8d9
@ -85,6 +85,7 @@ void config_default(void)
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config.hg = 1.0;
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config.rolloff = 0.995;
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config.dac_bits = 14;
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config.ym2413_enabled = 1;
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/* system options */
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config.region_detect = 0;
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@ -24,7 +24,7 @@
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#ifndef _CONFIG_H_
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#define _CONFIG_H_
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#define CONFIG_VERSION "GENPLUS-GX 1.4.1"
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#define CONFIG_VERSION "GENPLUS-GX 1.5.1"
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/****************************************************************************
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* Config Option
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@ -37,6 +37,7 @@ typedef struct
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uint8 filter;
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uint8 psgBoostNoise;
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uint8 dac_bits;
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uint8 ym2413_enabled;
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int16 psg_preamp;
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int16 fm_preamp;
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int16 lp_range;
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@ -321,20 +321,21 @@ static gui_item items_options[5] =
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};
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/* Audio options */
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static gui_item items_audio[12] =
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static gui_item items_audio[13] =
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{
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{NULL,NULL,"High-Quality FM: ON", "Enable/disable YM2612 resampling", 56,132,276,48},
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{NULL,NULL,"FM Roll-off: 0.999", "Adjust FIR low-pass filtering", 56,132,276,48},
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{NULL,NULL,"FM Resolution: MAX", "Adjust YM2612 DAC precision", 56,132,276,48},
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{NULL,NULL,"FM Volume: 1.00", "Adjust YM2612 output level", 56,132,276,48},
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{NULL,NULL,"PSG Volume: 2.50", "Adjust SN76489 output level", 56,132,276,48},
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{NULL,NULL,"PSG Noise Boost: OFF", "Boost SN76489 Noise Channel", 56,132,276,48},
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{NULL,NULL,"Filtering: 3-BAND EQ", "Setup Audio filtering", 56,132,276,48},
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{NULL,NULL,"Low Gain: 1.00", "Adjust EQ Low Band Gain", 56,132,276,48},
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{NULL,NULL,"Mid Gain: 1.00", "Adjust EQ Mid Band Gain", 56,132,276,48},
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{NULL,NULL,"High Gain: 1.00", "Adjust EQ High BandGain", 56,132,276,48},
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{NULL,NULL,"Low Freq: 200 Hz", "Adjust EQ Lowest Frequency", 56,132,276,48},
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{NULL,NULL,"High Freq: 20000 Hz", "Adjust EQ Highest Frequency", 56,132,276,48}
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{NULL,NULL,"Master System FM: ON", "Enable/disable YM2413 chip", 56,132,276,48},
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{NULL,NULL,"High-Quality FM: ON", "Enable/disable YM2612/YM2413 resampling", 56,132,276,48},
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{NULL,NULL,"FM Roll-off: 0.999", "Adjust FIR low-pass filtering", 56,132,276,48},
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{NULL,NULL,"FM Resolution: MAX", "Adjust YM2612 DAC precision", 56,132,276,48},
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{NULL,NULL,"FM Volume: 1.00", "Adjust YM2612/YM2413 output level", 56,132,276,48},
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{NULL,NULL,"PSG Volume: 2.50", "Adjust SN76489 output level", 56,132,276,48},
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{NULL,NULL,"PSG Noise Boost: OFF", "Boost SN76489 Noise Channel", 56,132,276,48},
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{NULL,NULL,"Filtering: 3-BAND EQ", "Setup Audio filtering", 56,132,276,48},
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{NULL,NULL,"Low Gain: 1.00", "Adjust EQ Low Band Gain", 56,132,276,48},
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{NULL,NULL,"Mid Gain: 1.00", "Adjust EQ Mid Band Gain", 56,132,276,48},
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{NULL,NULL,"High Gain: 1.00", "Adjust EQ High BandGain", 56,132,276,48},
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{NULL,NULL,"Low Freq: 200 Hz", "Adjust EQ Lowest Frequency", 56,132,276,48},
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{NULL,NULL,"High Freq: 20000 Hz", "Adjust EQ Highest Frequency", 56,132,276,48}
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};
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/* System options */
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@ -584,7 +585,7 @@ static gui_menu menu_audio =
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{
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"Audio Settings",
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0,0,
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8,4,6,0,
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9,4,6,0,
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items_audio,
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buttons_list,
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bg_list,
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@ -755,19 +756,19 @@ static int update_snd_items(void)
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if (config.hq_fm)
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{
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sprintf (items[0].text, "High-Quality FM: ON");
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sprintf (items[1].text, "FM Roll-off: %1.2f %%",rolloff);
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strcpy (items[1].comment, "Adjust FIR low-pass filtering");
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offset = 2;
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sprintf (items[1].text, "High-Quality FM: ON");
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sprintf (items[2].text, "FM Roll-off: %1.2f %%",rolloff);
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strcpy (items[2].comment, "Adjust FIR low-pass filtering");
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offset = 3;
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}
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else
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{
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sprintf (items[0].text, "High-Quality FM: OFF");
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offset = 1;
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sprintf (items[1].text, "High-Quality FM: OFF");
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offset = 2;
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}
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strcpy(items[offset].comment, "Adjust YM2612 DAC precision");
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strcpy(items[offset+1].comment, "Adjust YM2612 output level");
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strcpy(items[offset+1].comment, "Adjust YM2612/YM2413 output level");
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strcpy(items[offset+2].comment, "Adjust SN76489 output level");
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strcpy(items[offset+3].comment, "Boost SN76489 Noise Channel");
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strcpy(items[offset+4].comment, "Configure Audio filtering");
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@ -836,10 +837,10 @@ static void soundmenu ()
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/* special case */
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if (config.hq_fm)
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{
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if (ret == 1)
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if (ret == 2)
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{
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GUI_OptionBox(m,0,"FM Roll-off",(void *)&rolloff,0.1,95.0,99.9,0);
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sprintf (items[1].text, "FM Roll-off: %1.2f %%",rolloff);
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sprintf (items[2].text, "FM Roll-off: %1.2f %%",rolloff);
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config.rolloff = rolloff / 100.0;
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ret = 255;
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if (cart.romsize)
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@ -860,7 +861,7 @@ static void soundmenu ()
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}
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}
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}
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else if (ret > 1)
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else if (ret > 2)
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{
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ret--;
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}
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@ -869,6 +870,11 @@ static void soundmenu ()
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switch (ret)
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{
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case 0:
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config.ym2413_enabled ^= 1;
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sprintf (items[0].text, "Master System FM: %s", config.ym2413_enabled ? "ON":"OFF");
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break;
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case 1:
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config.hq_fm ^= 1;
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offset = update_snd_items();
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@ -891,7 +897,7 @@ static void soundmenu ()
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}
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break;
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case 1:
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case 2:
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config.dac_bits++;
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if (config.dac_bits > 14)
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config.dac_bits = 7;
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@ -919,25 +925,25 @@ static void soundmenu ()
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}
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break;
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case 2:
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case 3:
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GUI_OptionBox(m,0,"FM Volume",(void *)&fm_volume,0.01,0.0,5.0,0);
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sprintf (items[offset+1].text, "FM Volume: %1.2f", fm_volume);
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config.fm_preamp = (int)(fm_volume * 100.0 + 0.5);
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break;
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case 3:
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case 4:
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GUI_OptionBox(m,0,"PSG Volume",(void *)&psg_volume,0.01,0.0,5.0,0);
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sprintf (items[offset+2].text, "PSG Volume: %1.2f", psg_volume);
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config.psg_preamp = (int)(psg_volume * 100.0 + 0.5);
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break;
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case 4:
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case 5:
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config.psgBoostNoise ^= 1;
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sprintf (items[offset+3].text, "PSG Noise Boost: %s", config.psgBoostNoise ? "ON":"OFF");
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SN76489_BoostNoise(config.psgBoostNoise);
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break;
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case 5:
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case 6:
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config.filter = (config.filter + 1) % 3;
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if (config.filter == 2)
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{
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@ -967,7 +973,7 @@ static void soundmenu ()
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}
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break;
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case 6:
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case 7:
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if (config.filter == 1)
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{
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GUI_OptionBox(m,0,"Low-Pass Rate",(void *)&config.lp_range,1,0,100,1);
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@ -982,27 +988,27 @@ static void soundmenu ()
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}
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break;
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case 7:
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case 8:
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GUI_OptionBox(m,0,"Middle Gain",(void *)&mg,0.01,0.0,2.0,0);
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sprintf (items[offset+6].text, "Middle Gain: %1.2f", mg);
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config.mg = (int)(mg * 100.0);
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audio_set_equalizer();
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break;
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case 8:
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case 9:
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GUI_OptionBox(m,0,"High Gain",(void *)&hg,0.01,0.0,2.0,0);
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sprintf (items[offset+7].text, "High Gain: %1.2f", hg);
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config.hg = (int)(hg * 100.0);
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audio_set_equalizer();
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break;
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case 9:
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case 10:
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GUI_OptionBox(m,0,"Low Frequency",(void *)&config.low_freq,10,0,config.high_freq,1);
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sprintf (items[offset+8].text, "Low Freq: %d", config.low_freq);
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audio_set_equalizer();
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break;
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case 10:
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case 11:
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GUI_OptionBox(m,0,"High Frequency",(void *)&config.high_freq,100,config.low_freq,30000,1);
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sprintf (items[offset+9].text, "High Freq: %d", config.high_freq);
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audio_set_equalizer();
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@ -252,6 +252,13 @@ void z80_sms_port_w(unsigned int port, unsigned char data)
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}
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return;
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}
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if ((port >= 0xF0) && (config.ym2413_enabled))
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{
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fm_write(mcycles_z80, port&3, data);
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return;
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}
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z80_unused_port_w(port, data);
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return;
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}
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@ -285,11 +292,17 @@ unsigned char z80_sms_port_r(unsigned int port)
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default:
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{
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port &= 0xFF;
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if ((port == 0xC0) || (port == 0xC1) || (port == 0xDC) || (port == 0xDD) || (port == 0xDE) || (port == 0xDF))
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{
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return io_z80_read(port & 1);
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}
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if ((port >= 0xF0) && (config.ym2413_enabled))
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{
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return YM2413Read(port & 3);
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}
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return z80_unused_port_r(port);
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}
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}
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@ -21,6 +21,7 @@
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#include "state.h"
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#include "sound.h"
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#include "sn76489.h"
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#include "ym2413.h"
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#include "ym2612.h"
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#include "loadrom.h"
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#include "sms_cart.h"
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@ -30,6 +30,11 @@ static unsigned int psg_cycles_count;
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static unsigned int fm_cycles_ratio;
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static unsigned int fm_cycles_count;
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/* YM chip function pointers */
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static void (*YM_Reset)(void);
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static void (*YM_Update)(long int *buffer, int length);
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static void (*YM_Write)(unsigned int a, unsigned int v);
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/* Run FM chip for required M-cycles */
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static inline void fm_update(unsigned int cycles)
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{
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@ -66,7 +71,7 @@ static inline void fm_update(unsigned int cycles)
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}
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/* run FM chip & get samples */
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YM2612Update(buffer, cnt);
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YM_Update(buffer, cnt);
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}
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}
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@ -132,14 +137,38 @@ void sound_init(void)
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/* Initialize core emulation (input clock based on input frequency for 100% accuracy) */
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/* By default, both chips are running at the output frequency. */
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SN76489_Init(mclk/15.0,snd.sample_rate);
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YM2612Init(mclk/7.0,snd.sample_rate);
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/* In HQ mode, YM2612 is running at its original rate (one sample each 144*7 M-cycles) */
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/* FM stream is resampled to the output frequency at the end of a frame. */
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if (config.hq_fm)
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if (system_hw != SYSTEM_PBC)
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{
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fm_cycles_ratio = 144 * 7 * (1 << 11);
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Fir_Resampler_time_ratio(mclk / (double)snd.sample_rate / (144.0 * 7.0), config.rolloff);
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/* YM2612 */
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YM2612Init(mclk/7.0,snd.sample_rate);
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YM_Reset = YM2612ResetChip;
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YM_Update = YM2612Update;
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YM_Write = YM2612Write;
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/* In HQ mode, YM2612 is running at its original rate (one sample each 144*7 M-cycles) */
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/* FM stream is resampled to the output frequency at the end of a frame. */
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if (config.hq_fm)
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{
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fm_cycles_ratio = 144 * 7 * (1 << 11);
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Fir_Resampler_time_ratio(mclk / (double)snd.sample_rate / (144.0 * 7.0), config.rolloff);
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}
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}
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else
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{
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/* YM2413 */
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YM2413Init(mclk/15.0,snd.sample_rate);
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YM_Reset = YM2413ResetChip;
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YM_Update = YM2413Update;
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YM_Write = YM2413Write;
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/* In HQ mode, YM2413 is running at its original rate (one sample each 72*15 M-cycles) */
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/* FM stream is resampled to the output frequency at the end of a frame. */
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if (config.hq_fm)
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{
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fm_cycles_ratio = 72 * 15 * (1 << 11);
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Fir_Resampler_time_ratio(mclk / (double)snd.sample_rate / (72.0 * 15.0), config.rolloff);
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}
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}
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#ifdef LOGSOUND
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@ -151,7 +180,7 @@ void sound_init(void)
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/* Reset sound chips emulation */
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void sound_reset(void)
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{
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YM2612ResetChip();
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YM_Reset();
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SN76489_Reset();
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fm_cycles_count = 0;
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psg_cycles_count = 0;
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@ -209,7 +238,7 @@ int sound_update(unsigned int cycles)
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/* FM chip is late for one (or two) samples */
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do
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{
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YM2612Update(Fir_Resampler_buffer(), 1);
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YM_Update(Fir_Resampler_buffer(), 1);
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Fir_Resampler_write(2);
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avail = Fir_Resampler_avail();
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}
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@ -250,17 +279,17 @@ int sound_update(unsigned int cycles)
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void fm_reset(unsigned int cycles)
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{
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fm_update(cycles << 11);
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YM2612ResetChip();
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YM_Reset();
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}
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/* Write FM chip */
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void fm_write(unsigned int cycles, unsigned int address, unsigned int data)
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{
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if (address & 1) fm_update(cycles << 11);
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YM2612Write(address, data);
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YM_Write(address, data);
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}
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/* Read FM status */
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/* Read FM status (YM2612 only) */
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unsigned int fm_read(unsigned int cycles, unsigned int address)
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{
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fm_update(cycles << 11);
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1735
source/sound/ym2413.c
Normal file
1735
source/sound/ym2413.c
Normal file
File diff suppressed because it is too large
Load Diff
22
source/sound/ym2413.h
Normal file
22
source/sound/ym2413.h
Normal file
@ -0,0 +1,22 @@
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/*
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**
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** File: ym2413.c - software implementation of YM2413
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** FM sound generator type OPLL
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**
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** Copyright (C) 2002 Jarek Burczynski
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**
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** Version 1.0
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**
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*/
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#ifndef _H_YM2413_
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#define _H_YM2413_
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extern void YM2413Init(double clock, int rate);
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extern void YM2413ResetChip(void);
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extern void YM2413Update(long int *buffer, int length);
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extern void YM2413Write(unsigned int a, unsigned int v);
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extern unsigned int YM2413Read(unsigned int a);
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#endif /*_H_YM2413_*/
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@ -133,6 +133,11 @@
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#include "shared.h"
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/* compiler dependence */
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#ifndef INLINE
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#define INLINE static __inline__
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#endif
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/* globals */
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#define FREQ_SH 16 /* 16.16 fixed point (frequency calculations) */
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#define EG_SH 16 /* 16.16 fixed point (envelope generator timing) */
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@ -1933,18 +1938,17 @@ static void init_tables(void)
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/* initialize ym2612 emulator(s) */
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int YM2612Init(double clock, int rate)
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void YM2612Init(double clock, int rate)
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{
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memset(&ym2612,0,sizeof(YM2612));
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init_tables();
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ym2612.OPN.ST.clock = clock;
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ym2612.OPN.ST.rate = rate;
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OPNSetPres(6*24); /* YM2612 prescaler is fixed to 1/6, one sample (6 mixed channels) is output for each 24 FM clocks */
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return 0;
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}
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/* reset OPN registers */
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int YM2612ResetChip(void)
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void YM2612ResetChip(void)
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{
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int i;
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@ -1982,9 +1986,6 @@ int YM2612ResetChip(void)
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OPNWriteReg(i ,0);
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OPNWriteReg(i|0x100,0);
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}
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return 0;
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}
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/* ym2612 write */
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@ -2116,18 +2117,18 @@ void YM2612Update(long int *buffer, int length)
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advance_eg_channel(&ym2612.CH[5].SLOT[SLOT1]);
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}
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/* 14-bit channel output */
|
||||
if (out_fm[0] > 8191) out_fm[0] = 8192;
|
||||
/* 14-bit DAC inputs (range is -8192;+8192) */
|
||||
if (out_fm[0] > 8192) out_fm[0] = 8192;
|
||||
else if (out_fm[0] < -8192) out_fm[0] = -8192;
|
||||
if (out_fm[1] > 8191) out_fm[1] = 8192;
|
||||
if (out_fm[1] > 8192) out_fm[1] = 8192;
|
||||
else if (out_fm[1] < -8192) out_fm[1] = -8192;
|
||||
if (out_fm[2] > 8191) out_fm[2] = 8192;
|
||||
if (out_fm[2] > 8192) out_fm[2] = 8192;
|
||||
else if (out_fm[2] < -8192) out_fm[2] = -8192;
|
||||
if (out_fm[3] > 8191) out_fm[3] = 8192;
|
||||
if (out_fm[3] > 8192) out_fm[3] = 8192;
|
||||
else if (out_fm[3] < -8192) out_fm[3] = -8192;
|
||||
if (out_fm[4] > 8191) out_fm[4] = 8192;
|
||||
if (out_fm[4] > 8192) out_fm[4] = 8192;
|
||||
else if (out_fm[4] < -8192) out_fm[4] = -8192;
|
||||
if (out_fm[5] > 8191) out_fm[5] = 8192;
|
||||
if (out_fm[5] > 8192) out_fm[5] = 8192;
|
||||
else if (out_fm[5] < -8192) out_fm[5] = -8192;
|
||||
|
||||
/* 6-channels mixing */
|
||||
|
||||
@ -16,13 +16,8 @@
|
||||
#ifndef _H_YM2612_
|
||||
#define _H_YM2612_
|
||||
|
||||
/* compiler dependence */
|
||||
#ifndef INLINE
|
||||
#define INLINE static __inline__
|
||||
#endif
|
||||
|
||||
extern int YM2612Init(double clock, int rate);
|
||||
extern int YM2612ResetChip(void);
|
||||
extern void YM2612Init(double clock, int rate);
|
||||
extern void YM2612ResetChip(void);
|
||||
extern void YM2612Update(long int *buffer, int length);
|
||||
extern void YM2612Write(unsigned int a, unsigned int v);
|
||||
extern unsigned int YM2612Read(void);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user