This documentation was dug-up by John Dyson. It's probably not the

This documentation was dug-up by John Dyson. It's probably not the
most recent version, but should be quite useful to would-be 'wd'
driver writers. ...It escentially describes the IDE specification in
both hardware and software terms.
---
                          working document of the
                    CAM (Common Access Method Committee)

                                draft proposal

                             ATA (AT Attachment)

                          Rev 2.1     June 11, 1990

ABSTRACT:  This standard defines mechanical, electrical, and functional
requirements for attaching small computers employing an AT Bus with
intelligent peripheral devices. The resulting interface provides a common
interface specification for systems manufacturers, system integrators,
controller manufacturers, and suppliers of intelligent disk drives.