Dan Potter updated his site with this news:

One bit of DC news I felt like passing along (but which doesn’t merit pictures or anything just yet =). I’ve gotten an ATAPI CD-Rom drive to work with my IDE interface, though the ISA still isn’t very functional yet. I’m hoping to get some more test ISA cards soon to rectify that situation. I haven’t interfaced it to fs_iso9660 yet or anything, but the CD-Rom happily returned its ID block, etc.

Check his site http://dcdev.allusion.net/