In the end it should be on the card itself, of course, with auto-boot and so on. Currently I install it from floppy as a software driver for the slot the card is in. So far, I have written a ProDos driver (Merlin assembly) for my card, that is nearly working. My handwired proto board is working fine and I will have a proper PCB made soon. The hardware is based around André Fachat's SPI65/B CPLD SPI controller that I have modified for my own needs. I am not trying to build a floppy replacement, but more of a ProFile replacement with a SD card with one (later multiple) 32MB ProDos partitions. Just out of curiosity, I am currently in the middle of building my own SD card interface for my enhanced IIe.
