[Simh] problem with extended file support on 3.8-0 running on NetBSD/amd64 5.0

[Marc Chametzky]

>  make -D USE_ADDR64 vax
> 
>  and it ran and USE_ADDR64 seemed to be defined, but I'm still getting
> this error.

Looking at my makefile, I set my VAX_OPT to look like this:

VAX_OPT = -DVM_VAX -DUSE_INT64 -DUSE_ADDR64 -I ${VAXD} -I ${PDP11D} 
${NETWORK_OPT}

With this in place, I'm able to create >2 GB disks.

I also built my binary as a 64-bit binary with "-m64", but I don't 
remember whether that was also required.

--Marc