On Thu, 23 Jun 2005, Lee Revell wrote:Paul, if you can find that information and Join us into the Project, then we will be very happy about it. I hope you still have your ThinkPad. ;-)
Yup, it's just doing port IO. Get a kernel debugger for windows like
softice and this will be trivial to RE.
READ_PORT_USHORT / WRITE_PORT_UCHAR / READ_PORT_UCHAR
There are 3 ports involved. The 0xed "non-existant delay port" and a pair
of ports that are through the Super-I/O / IDE. They are used in a
index+value setup similar to reading/writing the AT keyboard controller.
From what I remember, my conclusion was that these instructions were theones to park the heads and then lock the IDE bus. It's a couple of months
ago, but somewhere I have the simplified version of what it was doing...
-Paul