> > Yes. But, even if I know how to program the mchip to output to
> > the video bus, there is something missing to enable overlay
> > (either in the mchip or in the ati video driver).
> It could be using the YUV digital inputs to the ATI chip.
Most likely yes.
> It seems however
> also quite likely to me that windows is doing the following
> 1. Issuing USB transfers which put the data into video ram overlay buffers
> (ie the DMA from the USB controller)
The rest seems good to me :-) I even think that the docs we have
are sufficient for this part (programming the mchip dma).
> 2. Using the YUV overlay/expand hardware in the ATI card
> (see www.gatos.org for X stuff for ATI for this)
I took a quick look on their site but it seems that the
Rage Mobility P/M card which this laptop has isn't yet supported.
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