Very fast file transfer over the parallel port, using dma and fifo, fast and slow methods. It works in dos and windows. It works in nt , if you use a program to open the ports so as winio. I have achived rates of 750 kbytes/sec in the fifo mode. The dma max seems to be about 500 kbytes/sec. You must make your own special parallel cable. Directions are given in dmapara.txt. I used a flat cable with every second line a ground. The maximum length seems to be about 5 meters.