OPENCORES.ORG

-)

And 

I'd imagine the Edk you have on disk is an eval version, they normally are
as EDK costs extra.

If you did pay for EDK, then you get one year of update, so you could then
update to latest EDK.

Xilinx certainly used to provide BDF's, 
	for instance this is the link to the reference designs for one of
the Xilinx boards I use.

http://www.xilinx.com/products/boards/s3estarter/reference_designs.htm

Andrew

-----Original Message-----
From: cores-bounces@o... [mailto:cores-bounces@o...] On
Behalf Of Alessandro
Sent: 10 July 2008 22:23
To: Discussion list about free open source IP cores
Subject: [oc] DDR IP for Spartan 3E Xilinx evakit

Hi everybody!

I'm working at this enhanced ZX-Spectrum clone (ZX-Badaloc) project: 
http://www.zxbada.bbk.org/badaloc_fpga/index.htm and, thanks to the support 
about the T80 core of Mike Johnson, who suggested a workaround for timing 
problem (using the fpgaarcade's pacman T80 wrapper), it is possible to run 
the clone on the Spartan 3E evaluation board (downloadable file available).

I'm using the internal blockram of the fpga, but the next step would be 
accessing the on-board DDR chip and to implement all the advanced memory 
features of the original clone (that I made using a XPLA3 cpld a couple of 
years ago).

The problem is: is there a way to istantiate a DDR controller which matches 
the ddr chip installed on this board without getting mad? I've been trying 
in many ways; maybe I need to install the EDK that comes with the board, but

the problem is: I started the project on ISE 10 and I don't want to 
downgrade it to 9 (which is the version of EDK on my Xilinx DVD). 
Furthermore, I'm not even sure this would solve the problem.

I'm new to fpgas, I found a way to istantiate block ram, the DCM for 85MHz, 
the T80 processor... but this time I'm stuck. I see there are ddr 
controller's IP here and there but it seems a complex matter to me. I can't 
believe xilinx does not provide one ready to use for this board... am I 
wrong?

If someone could help me, we may see a 64megabyte 42.5MHz ZX-Spectrum soon 
:-)

Thanks in advance and Best Regards
Alessandro

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