Can’t even give away that hard disk drive on your redundant PC system? Why not use it as a portable drive? This interface adapter allows a standard low-cost internal hard drive to be used as a convenient mobile plug-in unit, great for storing or transferring large files from PC to PC or notebook. A preprogrammed Altera EPLD chip ensures a neat unit with a minimum of external circuitry.It’s difficult to believe that the first PC systems came without a hard disk drive. How did we ever manage? It was only when hard drives appeared that the real convenience of a PC was realised, we didn’t mind that these drives could only store a few Mbytes and were about the same size and weight as a common house brick, it was certainly an improvement on reloading MS-DOS from a boot disk at every start-up.