@TheMogMiner I read what you wrote about CD-i emulation and the difficulties faced; but my eye as drawn to you mentioning no dump for certain variants, etc. Are you sourcing them/trying to get them decapped or can the DU/me chip in cash or something?
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One of the most interesting things to me is that the CD-i platform was more akin to platforms from around 2005 onward than its late-80's contemporaries. It was the first console that demanded developers interface with just the system libraries, and avoid direct hardware access.
It's worth mentioning that this presents multiple issues for emulating the CD-i: It's not a matter of emulating a single platform, it's a matter of emulating a specific implementation of the player spec.
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Some players are straightforward enough: A Philips SCC68070 (68k-derivative SoC), a Motorola DSP56k for audio, a Motorola 68HC05 for I/O, and another for CD servo control. Some have the latter three components all rolled into one ASIC (IKAT).
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Others have a middle ground, with I/O handled by a 68HC05, and CD control and audio rolled into another ASIC called CDIC. That's the model that MAME currently emulates, for better or for worse.
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