Second ROM chip. Looks like maybe the cards with 1 chip are 512KB and the ones with 2 ROM chips are 1MB? The setup is kinda unclear at this point.
That second card had been sitting on eBay for over 3 months. I actually looked at it before but didn't realize what it was until now and I guess neither did anybody else.
Edit.. thx by the way.
I think the seller lowered the price.. I just looked at the revisions, and they changed the price and shipping on the 29th of last month. Maybe that is part of the reason I overlooked it before
Edit again... Looks like the Prometheus card is a later revision card and the Computer Peripherals Inc. card is the earlier revision. (Earlier ROMs and only 10-bit ADC instead of 16-bit ADC)... as well as some other differences.
When I do the review, I'll post the differences, etc.. Think I might actually open up the new card and do a comparison.. or is that a bad idea.. uggghhhh.. I hate dealing with sealed items, especially when there seems to be a good reason to open them up.
Edit yet again... I think I tracked down the person, Dr. Daniel Tauritz, that made the ARIA FAQ and had the SSDK, etc. for download. I sent him an email asking about it. Hoping to get a response.