Dear Mark
Now, i now for sure that the problem is in the SDRAM memory that cames with the news DE1 and DE2 boards.
In the old boards they mounted the IS42S8800 from ISI.
In the new boards they are mounting the A2V64S40CTP from PSC (Power Chip Semiconductors)
Now i have two DE1 boards, one with the old IS42S8800 SDRAM that run with all the versions of Minimig and never crashes and one new DE1 with the SDRAM from PSC, this board only runs the precompiled versions 12.
With Quartus 8.0 SP1, i succesfully syntetized the version 13 for this new DE1 board, it runs, but hangs very often by problems of memory corruption.
Best Regards
Xavier Ruiz
----- Original Message -----
Sent: Wednesday, September 24, 2008 8:52 AM
Subject: [minimigtg68] DE2 & V13
Hi all,
Been having some problems with v13 and thought I'd see if anyone else has
had the same experience as me!?!
1st of all, I've downloaded the new v13 source and have built a project for
my own hardware, which has an EP2C35. I've copied the new spihost.rom to my
SD card and can boot Minimig and subsequent ADF images from the SD card no
problems.
However, if I program a DE2 with the pre-compiled .SOF file from v13 and use
the same SD card as above, I get nothing. Nothing at all! No video sync, no
LED light on reset - absolutely dead.
Ditto if I compile the DE2 project from the v13 sources.
Now, I have an old project from when I ported the DE1 port to the DE2,
before Tobias released a DE2 project. I replaced the top-level schematics in
this design with VHDL equivalents and a DE2 wrapper around the DE1
top-level. If I build this project - I get video sync and the OSD which says
that SPIHOST is found and booting. However, it never finishes booting and
often displays the OSD again - looping ad-infinitum. If I try resetting the
board with SW0, I get various results such as green screen, yellow screen,
grey screen, black screen - with and without the OSD message.
Time to look at timing methinks...
Regards,
--
| Mark McDougall | "Electrical Engineers do it
| <http://members.iinet.net.au/~msmcdoug> | with less resistance!"
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