Sad part is that my airplane predates most of these computers. When new,
the computers cost much more than the airplane, but now I bet you couldn't
fill my tanks for what you could get for most of 'em!

Roy Smith wrote:

"James M. Knox" wrote:
I don't remember a mark instruction on a VAX, or even a PDP-11.

I don't remember the details, but it did something funky with the stack
pointer and R5 which only worked right if you weren't running separate
I/D space. Had something to do with jumping back and forth between
co-routines (early hardware support for threading?).

--
--Ray Andraka, P.E.
President, the Andraka Consulting Group, Inc.
401/884-7930 Fax 401/884-7950
email
http://www.andraka.com

"They that give up essential liberty to obtain a little
temporary safety deserve neither liberty nor safety."
-Benjamin Franklin, 1759