Concepts of ESDI - http://www.infran.ru/TechInfo/BSD/handbook120.html From FreeBSD Handbook. Addresses; physical connections, device addressing and termination.
HwB: ESDI Cable by Joakim Ă–gren - http://invalid.ed.ntnu.no/~kamben/hwb/ca_ESDI.html Pinout and description for building an ESDI cable.