so it looks like there are 4 different values of electrolytic capacitors on this board. if anyone has a Gravis Ultrasound PnP, do you mind reading off those values for me? capacitance and voltage rating would be great!
today at the electronics flea market i picked up this SOP socket so i can take a crack at dumping the wavetable ROM!
i'm dumping it as a 27C400 but doing it in two halves (thus the switches soldered to the socket)
ooh, looks like a good dump!
on a lark i decided to try to load the raw binary data into Audacity, and it works!
@tubetime can you tell if the caps are in an audio portion or digital control portion?
I sort of suspect that the audio portion may not have changed that much between some GUS models.
Maybe you can find guesses on other models?
@drscriptt it's really not super critical, i just wanted to be accurate.
Jul 12, 2026, 2:02 AM@tubetime but what does it sound like?!
Jul 12, 2026, 2:25 AM@tubetime I wish I had the talent to make a little cartoon meme of a racoon or something, visibly trembling with rage, shouting "you can't post that without also posting a video version, this is the internet, those are the rules!!"
Jul 12, 2026, 5:59 AM@tubetime You so need to post a video of playing that.
@tubetime there is a ROM image floating around on the Internet, I’d be curious how it compares, since I’ve got an ARGUS board I’ve been meaning to burn a ROM for.