RE: cardreaderprob. of course
a.tammer at hetnet.nl wrote:
> Hi Rudy,
>
> I plan to use it for demonstration-purposes,
> with clients, for whom I'm designing webpages.
> It's smaller than a CDR, you can erase and
> re-record. I have a 256Mb-card (Sandisk) with
> it, so there's lots of space, for taking people's
> pictures, or their office's look, if they want that
> on their home-page.
>
> Problem is not in drive-letter-assignment. I can find
> no interrrupt-conflicts, none of the standard
> trouble-shooting techniques seems to do any good.
>
> I'm half-sleepy, while answering this, so maybe not
> everything makes sense. I do nevertheless send it
> and hope someone can come up with a solution.
>
> Hope you have the information you want.
>
> a@t, antoine
>
>
>
should have thought it! the device is memory mapped a la video cards.
the ram detection in pc's looks for memory in a sequential manner, ie: 1
big block to be used for programs. it does not recognize the video ram
as program memory becauseit sits outside that block.
processors having huge address space , 256mb is now possible for
devices. so the interface is in memory space somewhere.
a loop that trys to write /read from blocks of different address spaces
will eventually find the video card and this memory card.
to be user friendly this space is managed by a driver making it look
tothe user as a 'drive'.
later
rudy
rltoews at ilos.net
lotterywars
|
Not Categorized, Please Help
|
|
