Re: [ltp] IBM HDAPS Someone interested? (Accelerometer)

Paul Sladen
2005-06-25T06:26:02Z

On Thu, 23 Jun 2005, Lee Revell wrote:
> 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 the
ones 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
--
It sometimes snows here. Cambridge, GB