daved@cscnj.csc.COM (Dave Douglass) (10/24/89)
OK, so a typical hard disk controller has 4 registers located at 380h or wherever (I don't recall off the top of my head) These registers are: OFFSET READ WRITE 00h data in data out 01h controller status controller reset 02h not used controller select 03h not used DMA & int mask So how exactly do these registers work? I can find documentation on how to use the data registers to feed commands to the controller and on what the return value in the status register means, but nothing on the controller reset, controller select and the mask register. Would a RLL or SCSI controller work any differently? If so, how? Please no book references. If there was a book containing this information that was readily available, I'd have it already. Just a quick and dirty explanation of how to use them. Thanks. -- --------- Dave Douglass Computer Sciences Corporation Piscataway, NJ 08854 ....!rutgers.rutgers.edu!cscnj!daved