I ran into an interesting quirk the other day. I was adding CD sound to my 32X projects and found that Mode 1 doesn't work with the 32X in any emulator. It works fine on real hardware. When RV=0, the SCD is present at 0x400000 to 0x7FFFFFF just like in Genesis mode (no 32X), and you can use the SCD exactly the same as with the Genesis. Here's a version of my Wolf32X that inits the CD for mode 1, and plays tracks off the CD. It works great on real hardware. http://www.fileden.com/files/2009/2/3/2304902/Wolf32X-mode1-20120223.7z You can use any CD with at least 27 tracks, but if you want to use the tracks from here, you need to reorder the tracks like this: For SoD from here, reorder the tracks like this: