Subject: Re: emul compat pages?
To: Andrew Brown <>
From: Scott Bartram <>
List: netbsd-advocacy
Date: 09/04/2000 19:16:39
Andrew Brown wrote:
> >IBCS2 is in no way related to BSDI.
> well...partly yes, and partly no.  IBCS2 stands for "Intel Binary
> Compatibilty [sic, see compat_ibcs2(8)] Standard 2", so that's not
> BSDI, but BSDI binaries are of the IBCS2 format.  yes?

No, BSDI was a.out - just like NetBSD before 1.5. I think BSDI has
moved to ELF but I'm not sure about that.

As I also said, IBCS2 specifies an abi to the SVID which NetBSD does not
natively support. I seriously doubt BSDI does either.

> >IBCS2 is a binary interface standard for i386 application programs running
> >on systems that implement the SVID. The last version I saw (1991) only
> >specified the COFF executable format and x.out (XENIX) compatibility.
> right.  the abi, yes?  that's the "word" i was looking for.
> >IBCS2 allows us to run SCO XENIX, SCO UNIX, and some ISC UNIX binaries.
> "sco xenix" and "sco unix"?  hmm...i guess i'm getting a little out of
> my depth.  still, if we can emulate BSDI, then i feel the list should
> say so.  saying IBSC2 seems a little out of place, when (a) all the
> other things in that list are operating systems and (b) surely there
> are *other* operating systems out there that use IBCS2 that we cannot
> emulate?

We do emulate BSDI (up to version 2?) and any compatibility list should
say that.

IBCS2 is basically the same as an OS in this context. IBCS2 is the system
call interface used by SCO UNIX/XENIX. The only other IBCS2 OS I know of 
was ISC UNIX and the vendor-branded derivitives of that (WYSE, etc.)

Again, BSDI has nothing to do with IBCS2.