Prepare for reducing duplicates for 4op FM related codes
Add and correct bunch of presets
- mostly based on MAME source.
- Neo Geo AES uses slightly difference clock for NTSC, PAL colorbust frequency.
- Turbosound FM + SAA: Some Turbosound FM has additional SAA1099, for additional sound channel and Plays SAM coupe tune?
- PC-98:
- Sound Orchestra: OPN with hardpanned stereo, some model has with OPL family FM addons.
V variation has Y8950 and supports ADPCM.
- Sound Blaster 16 for PC-9800: This famous PC sound card is also exists for PC-98, with optional OPN PC-9801-26(K) compatibility on some models.
- IBM PCjr: PC with SN PSG sound, but less popular than previous models, and compatible Tandy 1000.
- Tandy 1000: PCjr and previous IBM PC compatible, also has SN PSG (later embedded in their ASIC, like Sega).
- Hexion: One of konami's budget arcade hardware with SCC + MSM6295 sound system, like their amusement hardware in this era.
- DJ Boy, Atari JSA IIIs, Skimaxx: How to panning sound or plays stereo sound on MSM6295 - just use MSM6295s per each output!
- Air Buster: One of arcade hardware with OPN + MSM6295 sound system, Used this configuration is also some hardwares.
- Tecmo system: One of arcade hardware with pretty unique sound system: OPL3, YMZ280B, MSM6295; first 2 entry is mostly used in music, last entry is mostly used in sound effect.
- Sunsoft Shanghai 3: Predecessor of Sunsoft Arcade is using YM2149 rather than FM, MSM6295 is still there.
- Atari Klax: example of arcade hardware sound system with single MSM6295 only.
- Ikari warriors: This early SNK Triple-Z80 hardware uses 2 OPL1s and no ADPCM supports.
- Coreland Cyber Tank: This rare arcade machine's stereo sound is like SB Pro, but it's actually produced in 2 Y8950s.
- Data East MLC: Latest arcade hardware from Data East, with single YMZ280B for sound.
- Kaneko Jackie Chan: Predecessor of Super Kaneko Nova System hardware, also with YMZ280B.
- Super Kaneko Nova System: Latest arcade hardware from Kaneko, with single YMZ280B for sound. this announced 3D acceleration addon, but finally cancelled.
- Toaplan 1: Home of Late 80-Early 90s Good ol' stuffs, Example of arcade sound system with single OPL2
- Namco Pac-Land: and this era, Namco start to change Custom 15 WSG to their Custom 30 WSG with featured RAM based waveform, and mailbox feature.
- Namco System 1: One of latest usage of Custom 30 WSG, with OPM FM hardware and 8 bit DAC and Stereo output.
Add various clock, type options for chips
- SN7: Prepare to add 17 bit noise variation, Game gear stereo extentsion, NCR PSG variation (MAME core only for now)
- OPN, OPNA: Add placeholder for prescaler option
- OPL: Prepare for OPL3L, OPL4 downscaled output rate option
Fix AY PSG clock divider function when exists, Update emulation core (MAME AY PSG and compatibles - includes noise routine updates)
Fix configuration flag, Add MSX Darky sound expander to preset
Clock divider isn't affected to expanded mode's tone and noise generator?
By doubling the internal clock frequency.
In expanded mode, the same tone period is an octave higher than in compat mode.
In expanded mode, the noise period is twice as fast as currently implemented.
See https://github.com/tildearrow/furnace/pull/416
so, there's to way for reduce N163 noises: reduce channel limit and demultiplex
* channel limit is runtime changeable and it makes some usable effects with disable demultiplex
* demultiplex is used for "non-ear destroyable" emulators, but less hardware accurate. (when LPF and RF filter is not considered)
Furnace support both after this, You can choose output behavior via configuration flag.
2 Pulse channels:
- 8 level pulse duty cycle, DAC mode(just ignores duty cycle)/pulse wave mode, 4 bit volume.
- Furnace support PCM playback in pulse channels with duty cycle ignore mode.
Sawtooth:
- nothing but 6 bit volume (8 bit accumulator in technically) and 12 bit frequency (periodic).
VRC6 instrument:
- 6 bit Volume macro for finer sawtooth volume handling, also 3 bit Duty cycle macro for pulse channels.
Duty, PCM mode command and Duty macro affects for pulse channel only.
Bubble System 2 channel Wavetable sound generator logic is configuration with K005289, 4 bit PROM and DAC.
K005289 controls pitch and 5 bit address generator per channel, Waveform select and Volume control is tied to AY-3-8910 ports. (each port for per channels)
these configuration is better known as K005289, the part of logic.
furnace emulates this configurations as single system, waveform format is 15 level and 32 width.
cam900