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Re: [partial-reconfig] Virtex-4 bitstream



Hi there;
if you know the part number, then you just knows the addressing. it's
hard-coded in the ise. The way to figure it out is to create a partial
stream which only modify a small part of the circuit that you understand
well, e.g. one or two frames manually modified in FPGA editor by yourself,
and open the partial bitfile with hex editor to study it. And i remember
there use to be some xilinx documents on how the bit file works on older
virtex. putting all these small pieces together, and you get it.

Good luck.
Kehuai


> Hi,
>
> I'm working on partial reconfiguration on virtex-4 devices. For now,
> I'm particularly interessed in bitstream organisation, since I'll need
> to perform readback and bitstream creation in the future.
>
> I could find some useful informations in the Virtex-4 configuration
> guide (UG701), and some older docs (XAPP151 and XAPP138), but still
> some important pieces are missing. I'm trying to understand how frame
> addresses are composed, the format seems to have change between V-II
> and V4 devices.
>
> Has anyone already worked on this?
>
> Thanks.
>
> Bertrand
>
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