Since I'm a linux-only user, I used the DE1 control panel replacement (wich is a command-line program) that can be found here:
I'm also using de1flash (I'm a Linux user, too) and it seems to work just great. Programmed atarixl.rom and ataribas.rom with it, and despite my issues with the core the ROMs don't seem to be a problem. Also tried the atariroms.bin from foft's website (flashed it to address 0) and it worked.
BTW: Not sure about this though:
Then we can write the ROM files to flash with the script called de1flash.tcl, wich is also included with the cp replacement download file :
./quartus_stp -t de1flash.tcl write ~/ATARI/ATARIOSB.ROM@0x0000
Did you really progam atariosb.rom (I used atarixl.rom), if yes what size is the ROM? atarixl.rom is 16k ($C000-$FFFF in Atari space, with selftest @$D000), atariosa.rom and atariosb.rom are usually 10k files ($D800-$FFFF in Atari space - $C000-$CFFF is unused in osa/osb, and there's no selftest. Only mathpack at $D800-$DFFF and OS ROM at $E000-$FFFF - usually they are combined into a 10k file for emulators). If you have a 10k file you need to adjust the flash address and program it at @0x1800:
./quartus_stp -t de1flash.tcl write ~/ATARI/ATARIOSB.ROM@0x1800
BTW: Though I'm a Linux user I thought it could save me some time if I did my first experiments on an old Windows XP box. What a big mistake, this cost me a whole day downloading and installing various quartus versions, but I couldn't get the DE1 control panel to work at all. It always complained that Quartus wasn't installed. I found several reports of this issue on the web, but none of the suggestions worked (of course Quartus was installed in the default location, and it worked fine - even uploaded the control panel sof using the quartus programmer, but to no avail, the damned DE1 control panel would still complain and refuse to start).
Then I ditched the idea of using the Windows DE1 control panel and had quartus programmer and de1flash working on my Linux box within a few minutes...
Thanks a lot for mentioning de1flash, otherwise I would still be struggling with this crappy windows software!