On Fri, 4 Sep 2020 17:19:39 -0400 Lewis wrote:

I've just made some interesting rediscoveries:

While my comments in the help section regarding DOS sessions are mostly
correct, the behavior we currently have and what is possible to change
is not.

All VDMs run at some delta between 0 and 31 in priority class
PRTYC_REGULAR (Class 2). The VDM handler apparently maps the DOS Setting
"SESSION_PRIORITY" values 1 to 32 to priority deltas 0 to 31.

This is essentially what I put into the help text. However, what is not
clear (or stated incorrectly, based upon program observation) is that
SESSION_PRIORITY (i.e., delta) *cannot* be changed for running VDMs,
and neither (as stated in the help) can the class be changed. IOW, All
VDMs run in class 2. SESSION_PRIORITY is settable in program properties
*before* starting the session, and fixed at that level (delta) once
started. There is no way to adjust these DOS session settings once
running.

Thanks for the info. If the fact that something is a VDM is available when the menu is being generated this would be an easy fix. If not probably not worth doing. I don't know if it is available but I will check.

Polling options can be changed for running VDMs, however (IDLE_SECONDS
and IDLE_SENSITIVITY), but lSwitcher provides no dialog for doing this.

So, what is needed is an RFE for lSwitcher to remove the Priority menu
selection for VDMs as it is simply irrelevant and misleading and to
adjust the help as necessary. (Likewise, XWP help should be updated to
include this tidbit pertaining to DOS sessions, but that's a different
discussion for a different project.)

This would require you making a case for this being needed by ArcaOS for something (retro gaming?) and I would then expect lSwitcher to at minimum be an install option for ArcaOS.

Comments and discussion welcome for all of this absurdity.

:-) Thanks