/usr/share/xscreensaver/config/apple2.xml is in xscreensaver-data-extra 5.36-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 | <?xml version="1.0" encoding="ISO-8859-1"?>
<screensaver name="apple2" _label="Apple2">
<command arg="-root"/>
<video href="https://www.youtube.com/watch?v=p3QZqhp67l8"/>
<hgroup>
<vgroup>
<select id="mode">
<option id="random" _label="Choose display mode randomly"/>
<option id="text" _label="Display scrolling text" arg-set="-mode text"/>
<option id="slideshow" _label="Display images" arg-set="-mode slideshow"/>
<option id="basic" _label="Run basic programs" arg-set="-mode basic"/>
</select>
<xscreensaver-text />
</vgroup>
<vgroup>
<number id="duration" type="slider" arg="-duration %"
_label="Duration" _low-label="10 seconds" _high-label="10 minutes"
low="10" high="600" default="60"/>
<xscreensaver-image />
<boolean id="showfps" _label="Show frame rate" arg-set="-fps"/>
<xscreensaver-updater />
</vgroup>
<vgroup>
<number id="tvcolor" type="slider" arg="-tv-color %"
_label="Color Knob" _low-label="Low" _high-label="High"
low="0" high="1000" default="70"/>
<number id="tvtint" type="slider" arg="-tv-tint %"
_label="Tint Knob" _low-label="Low" _high-label="High"
low="0" high="100" default="5"/>
<number id="tvbrightness" type="slider" arg="-tv-brightness %"
_label="Brightness Knob" _low-label="Low" _high-label="High"
low="0" high="200" default="150"/>
<number id="tvcontrast" type="slider" arg="-tv-contrast %"
_label="Contrast Knob" _low-label="Low" _high-label="High"
low="0" high="1500" default="1000"/>
</vgroup>
</hgroup>
<_description>
An Apple ][+ computer simulation, in all its 1979 glory. It also
reproduces the appearance of display on a color television set of the
period.
In "Basic Programming Mode", a simulated user types in a BASIC program
and runs it. In "Text Mode", it displays the output of a program, or
the contents of a file or URL. In "Slideshow Mode", it chooses random
images and displays them within the limitations of the Apple ][
display hardware. (Six available colors in hi-res mode!)
On MacOS and Linux, this program is also a fully-functional VT100
emulator! Run it as an application instead of as a screen saver and
you can use it as a terminal.
https://en.wikipedia.org/wiki/Apple_II_series
Written by Trevor Blackwell and Jamie Zawinski; 2003.
</_description>
</screensaver>
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