james1095 Posted September 26, 2015 Report Share Posted September 26, 2015 If you play a real Space Invaders cabinet, you might notice that the sounds of the FPGA Arcade implementation are not right. Grant Searle noticed this after building the original circuit with real hardware and re-wrote the audio code to provide sounds far more true to the analog sound circuits in the original game. Posted here with his permission to use as you like. I made a slight change to fix the width of the output signal but otherwise this is his code. Just throw it into the source folder replacing the original file of the same name. Then make one minor change in the sound board instantiation in the top level changing S1 and S2 to P3 and P5. I found I had to select Project> Cleanup Project Files otherwise I was getting a cryptic error. I've tried out the new sound code and found it to be a big improvement. So far I've only actually loaded and run it on an Altera board but it compiles fine in Xilinx ISE so I'm pretty sure it will just work.invaders_audio.vhd Quote Link to comment Share on other sites More sharing options...
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