> On Dec 19, 2018, at 1:48 PM, Johnny Billquist <b...@softjar.se> wrote:
>
> Unless I remember wrong, it's needed for Ultrix compatibility on VAX (and
> maybe MIPS?).
Ultrix compatibility is handled with COMPAT_ULTRIX, which is more or less
vanilla 4.3BSD, with a few extra random things. It, like COMPAT_SUNOS, is a
pretty thin layer, but also of questionable utility these days.
Same goes for COMPAT_OSF1 (for Digital Unix on Alpha) ... a thicker layer than
COMPAT_ULTRIX, but not nearly as thick as COMPAT_SVR4 or COMPAT_IBCS2.
COMPAT_OSF1 was never really fully implemented ... a bunch of stuff worked, but
none of the Mach traps or Mach IPC were ever emulated.
Outreach on those specific port mailing lists (port-pmax, port-vax, port-alpha,
port-sparc*) to determine "how useful is this these days?" is probably
warranted.
-- thorpej
