On Thu, 15 Feb 2001, Alan Cox wrote:
> > would take a seperate sequencer instruction to the bt848 DMA controller each
> > time you want to reset the address back to the start. It's not going to work
> > if you want to do this for every pixel, but you had a window 16 or 32 pixels
> > wide in the FPGA's PCI address space, you could probably do it.
>
> Since the 848 will burst in order the obvious approach to me would be to map
> the FPGA 32bit wide FIFO register across an entire 2Mb of PCI space. Just
> forget to decode a few bits 8)
Doesn't nvidia have a patent on this? I thought one of things they sued 3dfx
over was mapping a register over an address range, so burst transfers that are
designed to write blocks of memory can write to a single register efficiently.
_______________________________________________
Video4linux-list mailing list
[EMAIL PROTECTED]
https://listman.redhat.com/mailman/listinfo/video4linux-list
