tnt23 wrote:
"To be honest, I haven't spent much time thinking about writing. I was obsessed with reading in the first place you see There are good chances another tight loop can be built to aquire writing flow and to somehow deal with it, not necessarily turning that into pure ADF."
Perhaps the Amiga could write ADF-images to the flash card, via somekind of serial protocol through the floppy port? It is not the same thing as writing to a floppy, but you could do things from the Amiga keyboard. And similarly since microcontrollers usually have UARTs, you could read and write floppy-images from a remote computer via RS-232.
"Loading one ADF sector from MMC now takes 13ms, and preparing one MFM sector takes 56ms. These times can be optimized in variety of ways, from code to hardware (going high megaherz, using SDRAM instead of EDO/FPM DRAM etc)"
May a job for an FPGA?