One of my on-hold projects is an FPGA-based floppy controller (that is, my own version of the 8272). I wanted to make an FPGA-based computer that could talk to

One of my on-hold projects is an FPGA-based floppy controller (that is, my own version of the 8272). I wanted to make an FPGA-based computer that could talk to a real floppy drive. The interesting point is to make the MFM data encoder/decoder plus DPLL for clock recovery. I got as far as 3.3v to 5.v interface logic, plus acquired logic analyzer traces of real floppy data patterns.