IEEE 1284/EPP/ECP Frequently Asked Questions  
   Answers and insight into some of the common questions and misunderstandings regarding the 1284 parallel port standard and its usage.
   http://www.fapo.com/1284faq.htm

Warp Nine Engineering  
   The Extended Capability Port, or ECP, protocol was proposed by Hewlett Packard and Microsoft as an advanced mode for communication with printer and scanner type peripherals.
   http://www.fapo.com/ecpmode.htm

Interfacing the Extended Capabilities Parallel Port  
   Describes interfacing the ECP complete with register details and waveforms.
   http://www.beyondlogic.org/ecp/ecp.htm

TN 0078  
   Proposed ECP Interface to replace the memory board of the Mark IV.
   http://www.tass-survey.org/tass/technotes/tn0078.html

Computer Interface  
   Parallel interface information from Usbyte.com.
   http://www.usbyte.com/common/Parallel_Interface.htm