Reading VAX SID register on ultrix or 4.3bsd

[Chris Torek]

I was not railing *against* the `get interesting kernel variable'
syscalls, I was railing *for* them.  There are too few.  We could
use a get_cpu_type syscall, in particular for the C library routines
that use the fancy VAX instructions to do string operations.  They
run overly slow on the MicroVAX, since this machine traps on `locc'
and `scanc' instructions and emulates them in the kernel.

It would be nice, though, if it did not take a horrendous number
of syscall table entries to describe all the interesting kernel
variables; I argued for a call of the form

	get_kernel_variable(int variable_index)

I still think this should be done.

Chris