There is no MPEG decoder in the original base machines, just an external cartridge that is used by some (but not all) games, hence skirting around the MPEG patent issue for now.
I'm currently emulating the Mono Imodel (Philips 220 F2), which is arguably the simplest out of all of them. There are multiple CD-i revisions, all of which are pretty dissimilar, and will require a whole lot of work on a per-machine basis to emulate in MESS. Interestingly, if I pull a CDIC interrupt (line 2), the BIOS briefly tries to chat with the SLAVE device, but not much more than that.įrom previous conversations with Kale it sounds like the system is just That weird 68k variant, a framebuffer, a blitter / DMA device, an mpeg decoder, and a CD unit.
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