Hi guys,
It seems there's a compatibility issue between the DE1 bitstream files and
the new-rev DE1 hardware with the PSC SDRAM chips.

Basically, I used the precompiled microcode (POF/SOF) files on the
filebase. V1.2e booted Kickstart, but kept sporadically rebooting (as in, from
"loading SPIBOOT.ROM"). V1.3 wouldn't even load -- typically it failed with a
solid colour screen and the blue OSD visible, but with no OSD text (or garbage
instead of text).

I rebuilt V1.3 with the latest Quartus (V8.1 Web Edition) and programmed it
into my DE1, and it booted fine. Kickstart is up and running, and the demo ADF
loads OK. Unfortunately I don't have the microphone mod sorted out yet, so I
can't get Protracker to play any sound, but at least it boots...

Last point -- Quartus throws out a lot of timing analysis warnings, and a
couple relating to the SPI bootROM. These are probably worth looking into, but
I'm almost certainly not the best person for the job, given that I've only
been using Quartus for a few days... I did use Xilinx ISE in Verilog HDL mode
for a good year or two, so maybe that'll help a little :)

Thanks,
--
Phil.
ygroups@...
http://www.philpem.me.uk/