Hold Screen and Line Output Speed

[Jan Burse]

Dear All

I am playing with GNU prolog:
        GNU Prolog 1.3.1
        By Daniel Diaz
        Copyright (C) 1999-2009 Daniel Diaz
        on windows vista

I am running the following query:

?- repeat, write('Hello World!'), nl, fail.

The query will infinitely output the line
"Hello World!". This is fine.

Observation:
    Ctrl-C does not work, menu item Interrupt
    does also not work. The interrupt text is
    shown, but then it scrolls away?
    This is strange.

Question 1:
    Is there some Hold Screen button?
    (A toggle where we can switch on/off the
    blocking of the output producer)

Question 2:
    Is the speed of the terminal scrolling
    just an artefact from the GUI speed, or
    is there some setting for this?

Bye