On 03/11/2010 02:44, Patrick McNamara wrote:
On 11/02/2010 07:13 AM, Mark Marshall wrote:
Hi.
First some good news. I've managed to produce images for both FPGA's.
For the XP10 I've used "ispLever Starter FPGA 8.1.00.34.21.10". For
the S3 I used version 12.[123].00 of the xilinx tools (I forget which
I chose, we seem to have every version from 9.1 to 12.3 installed at
work?).
Very cool. What timing errors did you get on the XP10? Assuming that you
used the constraints from the repo, you likely got errors on the
bridge_ad signals.
I've not really used my S3 image - I've stuck with yours and tried to
not break compatability. I've made a number of XP10 images and they all
seem to have broadly worked. I have to admit that I find it very hard
to find the significant errors amongst the noise, and I also struggle to
understand what they mean. I can send a log if you are interested, but
they are quite boring!
I do get some errors somewhere, but I don't know if this is because I'm
running on a pre-production part? At the moment I see quite obvious
errors when the HQ code reads the text buffer while doing text-convert.
I get spurious '$' and '(' characters all over the screen (actually
there are a set of places where such a character might appear, and then
I randomly get or don't get it at those locations - I assume the
locations are where the address is some multiple of something?)
The intersting thing is that the font data is read back from the S3
perfectly (as far as I can tell) as the characters themselves are always
perfect. Maybe it is only the last word of a read that is corrupted?
It could also be a bug in the HQ code.
memtest fails with a minimum of 7000 erros or so, and I can see a
definate pattern to them. I think all of the errors are in the S3 ->
XP10 stage, and are not really memory errors. I'm not sure how to test
that.
MM
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