Which one works best and where can I get it?

http://www.google.ca/search?hl=en&q=CD...G=Google+Search

OMG - Oh btw, theres only 1 besides a very old one that only plays Rise of The Robots. So you don't have much of a choice.

Yeah but you have to pay for that emulator.

I wonder what cpu that system uses. /me goes and looks.

*Edit*

It's a motorola 68k -- same that's in CPS1/2, NeoGeo, and Genesis. ^^
I wonder...

You can do it IQ..

http://www.cditeaser.cdinteractive.co.uk/index.html
http://www.cdiemu.org/site/welcome.htm

Not compatible, CD-i uses custom Philips 68070, Neo uses in most cases a TMP68HC000 which would only be backwards software compatible (The CD-i's CPU is faster clocked 15.5 versus 12, so you could theoretically use it's chip in a Neo by splitting the clock, but not reverse) and the Genesis has a slower clocked CPU as well, but a generic off the shelf m68k @ 7.67mhz. So technically speaking, the CD-i is more powerful......I'm not sure what your "I wonder" is in reference to.

I thought you would know... he wonders if it could be emulated in FBA.

I'm not some noob that undertakes projects he knows he can't do.
If the x70's dma & extra opcodes are at all documented it's not a problem to extend FBA's Musashi 68k core.
The really difficult stuff would be adding drawing, irqs, CD-ROM, and sound (which wouldn't be horribly bad if they are documented.)
The "I wonder..." was referencing to my curiosity about the availability of hardware docs.