Which mode (ECP or EPP) would work best with parallel port devices such as the Snappy and the QuickCam Color?
As a general rule, because of its FIFOs and DMA support, ECP is good at transferrring big blocks of data quickly (scanners, printers). EPP is good for links that switch directions frequently (drives). Specifically, it depends on the driver for the device, so you might want to experiment if both options are available. Q: Do I need to use parallel cables and switchboxes which are SPECIFICALLY labeled to support ECP/EPP to connect my parallel devices, or will any cable and switchbox work with all ECP/EPP ports and devices (as long as they have the 25 pins wired straight-through)? A: A cable that is “IEEE 1284-compliant” meets certain standards for shielding, cable capacitance, etc. Over short links (5-6 feet), any cable will usually work, but you can run into problems with longer cables and higher speeds. Get the better cable if you have a choice. Q: I have been communicating in ECP mode with another device. PC to peripheral transfers work fine. However in peripheral-to-PC transfers, some