[HECnet] SIMH idle

[Paul_Koning at Dell.com]

PDP11 and VAX most definitely DO support idle.   PDP11 idle is tied to the WAIT instruction, which is used by most operating systems (but not by RT11).   VAX idle is tied to weird magic that matches code sequences against known ways of various operating systems to code their idle loops, so it's a bit more fragile -- and you have to tell it which OS you're using.

	paul

On Jun 26, 2013, at 12:22 AM, Gregg Levine wrote:

Hello!
Mark, I've built SIMH (again) and had the rig record the build
functions via script. I then bundled up everything that could possibly
be of interest as you related an earlier discussion as it applies to
the emulated video display methods for several emulated systems. I
mentioned that it build properly as it applies to the ones I am
interested in, but that the PDP11 and the VAX ones do not support the
Idle functions. As least it said idle disabled on the opening screen
for the SIMH PDP11 one. On the page describing what Equipment Wanted
is what I'm currently looking for, I added to the text there my files
that you're looking for, and they are named simb.txt, and then
pdp11.txt and then simstart.txt. Remember I mentioned that I wasn't
sure that this mail service supported attachments.

On that previous e-mail I also mentioned what else was involved.
Please use it as a reference to those, and also include the relevant
earlier portions of that thread.

-----
Gregg C Levine gregg.drwho8 at gmail.com
"This signature fought the Time Wars, time and again."