mw8080bw: improvements to 280zzzap netlist audio
* Noise-based sound effects corrected. The original strength of the
zener noise voltage was about three orders of magnitude too low
for the current being passed through a zener of this type. This
prevented the noise generator from working as designed and made
the noise far too weak for the noise-based sound effects to work
properly. Those effects now sound much closer to the real hardware.
* Implemented faster high-level emulation version of noise generator.
(Credit to couriersud for suggesting this.) The corrected noise
voltage made the component-level emulation of the noise generator
much too demanding on the minimum timestep needed to produce
accurate results without unrealistic voltage spikes, and so will
not run accurately at reasonable emulation speeds. But by replacing
it with a simple but effective AFUNC()-based comparator, we get a
functionally similar noise signal generator that produces
effectively identical output while still being able to run with
48 kHz static timestepping. So we get both decent emulation speed
and correct-sounding noise effects.
* Added output voltage clipping on post-crash sound to remove
voltage spikes, resulting in a smoother, more accurate sound.
(Credit to Aaron Giles for suggesting this clipping method.)
* Changed output to be taken from second LM3900 output opamp
(inverted signal) for smoother waveform and better tone quality.
* Added master volume potentiometer which can be user-set, set to
midpoint by default. Adjusted output scaling and offset to match.
* Various explanatory comments expanded or corrected.
* Added netlist simulations for the following games: Space War, Barrier, Star Hawk, Speed Freak, Star Castle, War of the Worlds, Sundance, Tail Gunner, Rip Off, Armor Attack, Warrior, Solar Quest, Boxing Bugs. Removed previous samples-based sound. [Aaron Giles, Couriersud]
* Added built-in minimal artwork for Warrior. [Aaron Giles]
* Changed speaker maximum sample tracking to be based on new compile-time define SPEAKER_TRACK_MAX_SAMPLE instead of MAME_DEBUG. [Aaron Giles]
* Modernized 74164 and 74393 netlist TTL devices. [Aaron Giles]
* new WORKING machines
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Guitar Star (Europe, PAL) [David Haywood, Team Europe]
Sports and Dance Fit Games Mat D-555 (PAL) [David Haywood, Team Europe]
Zone 7-in-1 Sports (PAL) [David Haywood, Team Europe]
Xing Wireless Interactive TV Game 'Wi TV Zone' 48-in-1 (Europe, PAL) [David Haywood, Team Europe]
new NOT WORKING machines
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Power Rangers Super Megaforce Hero Portal [David Haywood, Team Europe]
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CompuChess: The Second Edition [hap, Berger, Achim]
New working clones
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Chess Intercontinental Traveler [hap, Berger, Achim]
mpu4vid updates:
- Start to untangle and split apart and properly identify some mpu4vid sets now that they boot. There's nothing actually new here, despite it appearing that there are a lot of new clones and new sets, they're just the result of finally being able to identify some things properly, work out what belongs where, and gain a better understand of what is missing - some things were in entirely the wrong drivers, or paired with the incorrect ROMs. [David Haywood]
- Tweaks to some MPU4 Video inputs [James Wallace]
machines promoted to WORKING
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The Crystal Maze (v1.3) (MPU4 Video) [Ryan Holtz, James Wallace, David Haywood]
The New Crystal Maze Featuring Ocean Zone (v2.2) (MPU4 Video) [Ryan Holtz, James Wallace, David Haywood]
The Crystal Maze Team Challenge (v0.9) (MPU4 Video) [Ryan Holtz, James Wallace, David Haywood]
The Mating Game (v0.4) (MPU4 Video) [Ryan Holtz, James Wallace, David Haywood]
Adders and Ladders (v2.1) (MPU4 Video) [Ryan Holtz, James Wallace, David Haywood]
Strike it Lucky (v0.5) (MPU4 Video) [Ryan Holtz, James Wallace, David Haywood]
Barquest (v2.6) (MPU4 Video) [Ryan Holtz, James Wallace, David Haywood]
Tetris Payout (BWB TET1 Version 2.2, set 1) (MPU4 Video) [Ryan Holtz, James Wallace, David Haywood, Angelo Salese]
Blox (SJM BLOX, 50p/20p Play, Version 2.0) (MPU4 Video) [Ryan Holtz, James Wallace, David Haywood, Angelo Salese]
Prize Tetris (BwB) (MPU4 Video) [Ryan Holtz, James Wallace, David Haywood, Angelo Salese]
Vegas Poker (prototype, release 2) (MPU4 Video) [Ryan Holtz, James Wallace, David Haywood, Highwayman]
clones promoted to WORKING
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The Crystal Maze (v1.2) (MPU4 Video) [Ryan Holtz, James Wallace, David Haywood]
The Crystal Maze (v1.1) (MPU4 Video) [Ryan Holtz, James Wallace, David Haywood]
The Crystal Maze (v0.1, AMLD) (MPU4 Video) [Ryan Holtz, James Wallace, David Haywood]
The New Crystal Maze Featuring Ocean Zone (v2.0) (MPU4 Video) [Ryan Holtz, James Wallace, David Haywood]
The New Crystal Maze Featuring Ocean Zone (v0.1, AMLD) (MPU4 Video) [Ryan Holtz, James Wallace, David Haywood]
The Crystal Maze Team Challenge (v0.8) (MPU4 Video) [Ryan Holtz, James Wallace, David Haywood]
The Crystal Maze Team Challenge (v1.2, AMLD) (MPU4 Video) [Ryan Holtz, James Wallace, David Haywood]
Adders and Ladders (v2.0) (MPU4 Video) [Ryan Holtz, James Wallace, David Haywood]
Strike it Lucky (v0.53) (MPU4 Video) [Ryan Holtz, James Wallace, David Haywood]
Prize Space Invaders (BWB INV1, 50p/30p Play, Version 1.2) (MPU4 Video) [Ryan Holtz, James Wallace, David Haywood, Angelo Salese]
Tetris Payout (BWB TET1 Version 2.2, set 2) (MPU4 Video) [Ryan Holtz, James Wallace, David Haywood, Angelo Salese]
Prize Tetris (BwB) (Showcase) (MPU4 Video) [Ryan Holtz, James Wallace, David Haywood, Angelo Salese]
