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

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

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

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