I was finally able to boot ProDOS! The big holdup seemed to be the floppy emulation. As soon as I disabled the floppy ROM, it booted into ProDOS and the basic interpreter. ProDOS seems to do something with the floppy even though it is not the boot drive. ProDOS also sees the extra 64K of memory and sets up a RAM drive. I am trying to decide what to do with the extra 384K of RAM. Originally I was going to set it up as another RAM drive, but I have been thinking of setting it up as additional banks of memory like the RAMWORKS card.