Re: PCMCIA video?

On Mon, Nov 27, 2000 at 07:33:01AM -0800, Jim Gettys wrote:
> It is the VGA out card you'll find on the page for the HP Jornada 720
> (a PDA with keyboard that is also a SA1110). The card uses
> a Trident graphics chip.
>
> See http://www.hp.com/jornada/products/720/acc_vga_out_pc_card.html
>
> Status right now: the card does not ID itself the way a "normal" PCMCIA
> card should. It appears (on x86 Linux) as anonymous memory, that Linux
> is marking read-only.
>
> We clearly need to get to the point to be able to write to the card
> to be able to use it. Someone with more PCMCIA expertise is needed
> to track down how to do this. Right now we are stuck.
>
> If we can get past this point, Alan Hourihane has an iPAQ, one of the cards,
> and the expertise for the Trident graphics chip required to get this running
> (he maintains the Trident XFree86 code).
>

And I've just joined this list.

Jim is absolutely correct. The current linux pcmcia utils(3.1.22) identifies
the card as a standard memory device and maps a single memory block, which
ends up mapping it's ROM BIOS which is built onto the Trident chip.

I suspect the PCMCIA utilities needs to be told a little bit more about
this device. As 1, yes - it comes up as write-protected, 2, The chip should
also map either an IO window through memory space or through register space
which it doesn't.

I've been looking through the PCMCIA stuff and although it doesn't look
too bad to understand, I've talked with David Hinds about this and without
documentation on what bits to flip with this were not going to get anywhere.

Anyone who can prod HP, as I've tried contacting the Jornada centre with no
help at all, would be a big help.

Alan.
Received on Mon Nov 27 2000 - 07:35:36 EST