Neat Hack A Day article about a reverse engineered version of the original Sound Blaster card https://hackaday.com/2019/06/19/reverse-engineering-the-sound-blaster/ Its not the first clone of the Sound Blaster but its the first time anyone has actually reverse engineered it and made schematics and a PCB and stuff.
I wonder if MAME can emulate the Sound Blaster DSP rom now that its been dumped...