Unless you are making a single shot solution for a school or personal project I would discourage the use of a parallel port. Few new PCs have this port anymore and it is a pain in the behind to use it in Windows.

One way to get this data into a computer more quickly may to be to consider the use of a video capture card. These devices plug into a bus slot and accept an analogue video signals and permit conversion to digital format into the PC's memory. The lowest cost versions of these are designed to accept something like NTSC or PAL formatted analogue video but you can find boards that can accept separate R, G, and B analogue input channels. You would have to come up with some analogue circuitry and electronics to adapt the CCD outputs and timing into a suitable drive for the capture card.

Another possibility for you to investigate is to look for a video input solution for your PC that has a DMI connection. Then build a DMI output for your CCD scanner. There may now even be chips that do this type of conversion for you.

Michael Karas