Bob Bob wrote:

- The NEC2 etc executable more or less runs in a DOS window. I would
guess that it runs primarily in realmode and swaps its data array in and
out of high memory. Kind of like the EMM of old. Does this mean it is
only a 16 bit app and therefore a waste on a 32 bit processor? This is a
similar logic one applies when using a RISC workstation for CAD work.

I don't know. When it comes to adressing range, normal windows
application can only adress a max of 2Gb (appr 11000 segments) out of a
maximum total of 4Gb, if available. I know from experiments at work
using VMware system virtualization, where max memory is also an issue,
that for some hardware special work-arounds are available to increase
the 2Gb limit to a max of 3Gb.

- I had thought that to a degree software has to be aware of the dual
processor/core capability before it can use it. I would think that a
"dos box" probably isn't aware of same. This would explain 50% use.

Yes, one would normally say so, but when looking at both processor
utilizations one showed a load of appr 40%, the other of appr 60%.