Thread: Z4-e85 display hack...

Ya know, I did use the search button and I did find that thread and I did sign up for that group.

But ya know... I read that thread and I have no idea on how to "send packets". Powerstrip - not sure where to start there. And, I do have that question out on the yahoo group - no answer there (although I am hopeful).

I even went out to DarthTater's site and read it through - no help there. So I sent him an email, no answer yet.

And instead of hijacking his thread, I figure I'd start another.

Been searching for a few weeks on and off, here and on the web - still no answers. And I do appreciate your "30 second" finds although they really do not answer the questions I have.

Maybe I should be more specific?

Well, lets give specifics a shot then. I got this far from DarthTater:

I'm actually not interfacing with the car's ibus, but instead, simulating the ibus enough to operate the screen. All it takes is a pull-up resistor (10K) to twelve volts. I finished the screen wiring this afternoon - used a single Cat 6 cable to run both the video and the "simulated" ibus from the PC in the trunk. The LCD itself is a 6.5" but it requires RGsB at NTSC or PAL timings. I use an old Matrox G200 and Powerstrip to generate the right signal. Mostly since the G200 will also output the required Sync on Green natively. As for data packets there are only a few relevant ones. First, the monitor needs 80 xx bf 11 01 xx - which is a general bus-wide wakeup (key on). Then you can use 3b xx f0 4f 11 11 xx and 3b xx f0 4f 01 01 xx to turn the video on and off respectively. The monitor also needs a keep alive packet sent every 18-20 seconds - 3b xx 46 01 xx. I send it every 10 or so just to be safe - the count resets everytime it receives the message. And finally, to turn the monitor off, send 80 xx bf 11 00 xx (key off). For those who arent' familiar the packets are structured like so:

aa bb cc yy yy yy yy yy xx

aa - sending device address
bb - total packet length
cc - receiving device address
yy - data
xx - checksum

So, where/how does the pull up resistor install and how does one "send packets"? Does someone have a schematic of the wiring hookups for one of these units? How does the VGA output end up a RGsB input? I can see compensating with Powerstrip but does that change the signal as well?

Are there any specifications on this screen? Is the resolution high enough to support video? Is there another screen that will fit in this case with minimum fuss? Does anyone have dimensions on one of these units?

Thanks

Anyone?

Now I am really confused. I got some information about the iBus interface,

"The interface will allow you to talk and listen to all devices connected to the IBUS in your car with a PC and some software."

Ok... so do I need an iBus, a screen, and a interface to turn it on? This is not making any sence.