>> Sunday, October 11, 2009
Although... "I'd be willing to bet that the high-pin-count Motorola custom is whatever beastly integrated CD + audio controller solution they're using. If you go directly to the image links to get around the non-linked resize mangling that the boards do to the images, you can read the part numbers on most of the MPEG board's chips pretty clearly. My Google-fu might be weak, but at any rate, I couldn't come up with anything for any of the Motorola-branded customs except the DSP56k. For example, the XCD251FU part has exactly 0 results that aren't fracking Chinese part-mining sites. Motorola does not make one-off customs. Those chips were sold to everyone, so documentation should be possible. The XC prefix is problematic though since it indicates a pre-production sample ("eXperimental Chip"). I'd just figured out MCD251 as part of the typical Motorola chipset."
CDI 470/05 PCB
CDI 470/05 PCB (Underside)
Picture of the Digital Video Cartridge in a 490...