Mikael Kjellstr”m wrote in a message to All:

 MK> Why does OS/2 switch of the interrupts when scrolling a dir
 MK> listing in a CMD.EXE session?

 MK> If I enter "DIR C:\*.* /S" the mousepointer gets real
 MK> jerky/weird or unresponsive.

 MK> Is it because OS/2 switches of the interrupts (STI) when
 MK> scrolling?  Or is it maybe the call to the filesystem that
 MK> switches of the interrupts? 

 MK> Someone who knows why?  And is it going to be fixed in time
 MK> for Merlin?  Or maybe it isn't fixable?

Try "DIR C:\ /S > NUL" and you will not see any jerkiness in
the mouse.  What is happening is that the mouse movements are being
processed by the operating system, but the screen cannot be updated quickly
enough to show it.  Updating the mouse cursor is, I believe, handled by a
separare thread in PM.
 
-- Mike


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