This was a pretty interesting find. I don't know how common these are but I have never come across one before and I got it for a good price.
It is an MP-878S Avance Logic ALS4000 MiniPCI Sound Card with the connector panel\module, software and original box. A bit of googling led me to this one made by Commell. I recall Commell selling lots of compact or unusual form factor boards and systems back in the early 2000s, so this makes sense as an accessory for one of those systems.
The ALS4000 is actually a pretty great PCI card for DOS\9x gaming from what I can tell, so it is not only an interesting curiosity, it could actually allow a board with a miniPCI slot to have functional DOS compatible audio, assuming the chipset cooperates with it.
Interestingly, the same PCB seems to have been used for multiple devices and has unpopulated, but labeled, spots on the PCB. The BT879 is an A/V capture chip, and the ALC201A is an AC97 compatible audio chip. I think the DOS-compatible ALS4000 chip is by far the most interesting thing they could have put on this. 😁
(sellers pictures, not mine)
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Does anyone know of any specific computers that the little audio connector panel would have been designed to attach to?
Now for some blitting from the back buffer.