5 links
ATA-ATAPI.com
ata-atapi.com
Offers information about ATA and ATAPI devices. Also provides drivers and historical information.
Beyond Logic
beyondlogic.org
Includes detailed information on USP, serial ports (RS-232), parallel ports (SPP/ECP/EPP/IEEE1284) and device drivers.
Leroy's Engineering Web Site
interfacebus.com
Containing detailed interface bus standards and engineering design information.
Technical Committee T13 AT Attachment
t13.org
Responsible for all interface standards relating to the popular AT Attachment (ATA) storage interface utilized as the disk drive interface on most personal and mobile computers tod…
The Hardware Book
hardwarebook.net
Provides circuits, pinouts, cable and adapter descriptions plus other technical information.