I am somewhat confused by this. According to the datasheet, the
IS42S8800 is organized as 2Mx8x4, whereas the PSC chip is 1Mx16x4..

--- In minimigtg68@yahoogroups.com, "Javier Ruiz" <soyandroid@...> wrote:
>
> 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 -----
> From: Mark McDougall
> To: minimigtg68@yahoogroups.com
> 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!"
>