My "mildly" outfitted A1200 has a Blizzard 1260 + SCSI, 20GB ATA4 HD, EIDE'99, HD floppy and DCE SD/FF all inside. I still have the clockport free for something like a sound card or Subway USB. Also, I could add a laptop CD-R(W) inside if I needed. Everything is powered by a Bigfoot PS, but you could easily do it with a modified PC power supply (which is what the Bigfoot is esentially...).