Section: XScreenSaver manual (6x)
Updated: 6.00-1.fc34 (02-Apr-2021)
apple2 - Apple ][ display emulator
] [-foreground color
] [-window] [-root] [-mono] [-install]
[-program command to run
[-basic] [-slideshow] [-text]
[-meta] [-esc] [-bs] [-del] [-fast]
program simulates an original Apple ][ Plus computer in all its 1979
glory. It also reproduces the appearance of display on a color
television set of the period.
There are 3 modes: basic, slideshow, and text. Normally it chooses a
mode randomly, but you can override with the -basic,
-slideshow, or -text options.
In basic mode a simulated user types in a Basic program and runs it.
In slideshow mode it chooses a number of images from the image source
you configured into XScreenSaver and displays them within the
limitations of the Apple ][ display hardware. With only 6 available
colors, you can only make out the general shape of the pictures.
In text mode it displays the output of a command or the contents of
a file or URL (via the default
program, which can be overridden with -program).
In text mode, it is also a fully functional (if anachronistic)
vt100 terminal emulator.
accepts the following options:
Draw on a newly-created window. This is the default.
Draw on the root window.
If on a color display, pretend we're on a monochrome display.
Install a private colormap for the window.
- -visual visual
Specify which visual to use. Legal values are the name of a visual class,
or the id number (decimal or hex) of a specific visual.
Choose basic mode
Choose slideshow mode
Choose text mode
- -program sh-command
In text mode, the command to run to generate the text to display. This
option may be any string acceptable to /bin/sh. The program will be
run at the end of a pipe, and any characters that it prints to
stdout will be printed on the Apple ][ display. If the program
exits, it will be launched again after 3 seconds. Default:
In text mode, apple2 emulates a vt100 terminal running on a 40x24
apple2 -text \
-program 'cat /usr/src/linux*/README | fold -sw40'
apple2 -text -program 'ping apple.com'
apple2 -text -program 'ps -e'
apple2 -text -program 'od -txCz -w7 /dev/urandom'
apple2 -text -program 'cat /dev/random'
apple2 -text -fast -program 'xemacs -nw -q -f life'
apple2 -text -fast \
-program 'xemacs -nw -q --eval "(hanoi 5)"'
You can also use apple2 as an extremely lo-fi replacement for the
apple2 -text -fast -program tcsh
In -text mode, launch the sub-program under a pty so that it
can address the screen directly. This is the default.
In -text mode, launch the sub-program at the end of a pipe:
do not let it address the screen directly.
When the user types a key with the Alt or Meta keys held down, send an
ESC character first. This is the default.
When Meta or Alt are held down, set the high bit on the character instead.
Swap Backspace and Delete. This is the default.
Do not swap Backspace and Delete.
Normally, characters are printed at the speed of an original Apple][
computer; however, when using this program as a terminal emulator,
the novelty of those 300 baud characters might wear off. You can use
the -fast option to speed things up a bit.
Display the current frame rate and CPU load.
By default, apple2
allocates a pseudo-tty for the -text
sub-process to run under. This has the desirable side effect that the
program will be able to use
to fetch information about terminal parameters and window size, which
many programs (such as
need to run properly. apple2
will also set the environment
in the child process.
Any characters typed on the apple2 window will be passed along to
the sub-process. (Note that this only works when running in "window"
mode, not when running in -root mode under xscreensaver.)
to get the default host and display number.
to get the name of a resource file that overrides the global resources
stored in the RESOURCE_MANAGER property.
to inform the sub-process of the type of terminal emulation.
Notable X resources supported include the following which correspond
to standard TV controls:
which correspond to standard TV controls. They range from 0 to
100,except for tint which is an angle between -180 and +180.
Apple ][ and Applesoft are trademarks of Apple Computer.
Copyright © 2002-2003 by Trevor Blackwell. Permission to use, copy,
modify, distribute, and sell this software and its documentation for
any purpose is hereby granted without fee, provided that the above
copyright notice appear in all copies and that both that copyright
notice and this permission notice appear in supporting documentation.
No representations are made about the suitability of this software for
any purpose. It is provided "as is" without express or implied
Television and Apple ][ emulation by Trevor Blackwell <firstname.lastname@example.org
Slideshow and text mode by Jamie Zawinski <email@example.com
Pty and vt100 emulation by Fredrik Tolf <firstname.lastname@example.org