The Oric IDE Interface was a 1990s attempt to connect Oric micros to IDE disks. The project is obsolete in our days of cheap, gigantic (by 8-bit micro standards) SD cards, dirt-cheap microcontrollers, FPGAs and CPLDs. The whole project could be coded in VHDL or Verilog and implemented on the smallest FPGA chip available without any other integrated circuits on the board. But then, where's the fun in that?