To dig a little deeper here, let’s take a quick look at an actual device: an IDE disk driver“AT Attachment Interface for Disk Drives” by Lawrence J. Lamers. Reference number: ANSI X3.221, 1994. Available: ftp://ftp.t10.org/t13/project/d0791r4c-ATA-1.pdf. A rather dry document about device interfaces. Read it at your own peril.. We summarize the protocol as described in this reference“Hard Disk Driver” by Washington State Course Homepage. Available online at this site: http://eecs.wsu.edu/ ̃cs460/cs560/HDdriver.html. A nice summary of a simple IDE disk drive’s interface and how to build a device driver for it.; we’ll ...