> I tried minicom on ttyS0 and lp0 (then with options I thought would output more somewhere.)  It should be lp0, but maybe with a symlink to it--so far there was no output.

It's important to get it working.  It would be a good idea to hook a different computer up until you figure out how to get output from a serial console.  Once you have that working it will be much easier to debug.

Now I only have 1 other GNU/Linux system besides the s4882, and I do not see why just trying a different one will help.  Most info (I read tens of documents) about /dev/lp0 and minicom say lp0 is right and minicom works automatically (if you remove the modem init. strings.)  If that is not so because there is something undocumented I must figure out, perhaps I will re-flash my old BIOS: too much of GNU/Linux that I try to use is undocumented, and my s4882's 19.2 Gflops could still be helping BOINC or something rather than going to waste.

I had meant to send this following earlier reply to the list.

>>> [...] if you grep the source for post_code you'll find some.
>
>That string is there for some boards except s4882.  I looked in src: boot, console, arch/i386 and could not figure anything out.
>
>It's important that the size is exact.  Flash is sized in megabits, so
>4 Mbits = 512KB.  This probably isn't the problem, I just wanted to
>make sure.
>
>I mounted my usb disc: my coreboot.rom is exactly 512Kb.  I looked up 'prepend:' a page on coreboot.org says one can prepend >VGA ROM that is either onboard or in a card.  The 64-bit Linux Coreboot instructions and the compiling pages do not say that, so I >assume compiling or grub2 are sufficient (unless you had implied I must prepend VGA BIOS....)

--David