Re: [Etherboot-developers] stumbling block for 5.2

[<ke...@et...>]

>The reason zeroing BSS wipes out the return path is simple: BSS contains
>the 32 bit stack with the return address on it! Now to figure out what
>to do about this.

Ok, I've fixed this. I put the protected mode stack in its own segment
between _ebss and _end, so that it isn't zeroed at the beginning of
main.

But that's not all that was needed. At the start of comprefix.S I
changed %ss to somewhere out of Etherboot's way since the real mode
stack with the return address was being clobbered by Etherboot too.

So now it returns to the DOS prompt ok, but DOS doesn't quite work right
after that, I don't know if this is because of the old FreeDOS I'm using
or Etherboot is messing up FreeDOS another way, possibly via the GDT. If
somebody could try .com images with another DOS it would be appreciated.
The latest sources are in CVS.

And now the ROM version exits to the BIOS ok too after the stack segment
fix. Marty and anybody else with a moment to spare, could you please
check out the latest changes and test the ROM version (really burn it on
an EPROM or EEPROM, not the floppy simulation) and check that the Quit
command returns control to the BIOS to boot the next device in the BIOS
list? It works for this ISA NIC of mine but I'd like confirmation with
PCI NICs.

I will release 5.1.10 (release candidate 2) in a day or two.