Tank Battalion, (c) 1980, by Namco, running in MAME with netlisted audio emulation. No more samples needed.pic.twitter.com/D85MLhjSl0
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With some exceptions, if you have a complete list of components from the audio section of an arcade board and take the time to exactly transcribe how they are interconnected, then with a bit of glue logic in the MAME driver, it Just Works™ and gives you audio.
The primary exceptions generally involve certain types of noise-generator circuits. By running a standard bipolar-junction transistor against the rails to the point it hits reverse breakdown, you can use it as a noise source. This does not work, for various reasons.
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So, in the case of Star Cruiser for example, which makes use of this type of noise source, I simply commented out that particular transistor and plumbed in a normally-distributed high-level noise source instead. The rest of the circuit is still simulated as it ought to be.
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Oh wow so the sound circuit is transcribed and emulated as is, fascinating stuff. This means stuff like Exidy's Death Race could finally be emulated? Neat
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