[Open-graphics] Re: DDC injection box Re: Boot-time video mode

[Timothy Miller]

On 9/2/06, Jack Carroll <mykrowatt at comcast.net> wrote:

>         The EDID format is pretty complicated, with all the options it
> offers.  But I2C is something else altogether.  It's been some years since I
> read anything about the I2C electrical interface, but as I recall, its
> complexity goes beyond the realm of the outrageous into the diabolical.  Not
> something we should be eager to implement ourselves.

We did I2C for TROZ.  IIRC, the hardware wasn't all that complex.  The
protocol is so low-speed that we were able to do it mostly in
software.  Maybe I'm remembering that wrong, but I don't recall anyone
ever complaining about it.  Doesn't I2C essentially give the master
"manual" control over the clock?