Apple IIc (not IIC+) details

While there seems to be a fair amount of information about the older apples, i.e. ][, ][+, and the IIc+, I've been unable to find any menaingful information on the web about the plain-old IIc. It has an external connector to a floppy disk drive, but I've found no information about the drive itself. The IIc+ has an external "intelligent" drive, and I'd like to know what that means, in this case, not to mention that I'd like to know about the "intelligent" hard disk that attaches to the IIc+ via that same connector, though perhaps not using the same protocol. There's also little definitive information about the memory usage for I/O and how (and how closely) they emulated the ][+ slot usage. They've apparently memory mapped the keyboard, so I would also like to know where in the memory map the keyboard lives. I'm considering cutting a hole in the side of the box to accomodate some sort of I/O channel. I understand that there was an expander available from a third party, but have little information about that. The slot I'd make in the box would accomodate a 40-pin, or perhaps 50-pin inline cable connector. Since I'd prefer to make an internally buffered I/O channel as opposed, simply, to bringing out the CPU's signals, it would be useful to have some information. Any suggestions? Dick