Most Useful Lead
It is a 34-way ribbon cable for use with the 1MHz bus, which I have expanded over the years. At the Beeb end there is the single female connector for the 1MHz bus.
At the device end there are two further female connectors for hard drives, floppy drives or daisy chaining other devices, an edge card connector for direct connection to a bare 5¼" floppy disc drive, a male IDC header for further daisy chaining and a 37-way D-type connector for using with a FileStore E01 or Acorn Winchester Disc unit.
