apple2 - Apple ][ display emulator
] [-foreground color
] [-window] [-root] [-mono] [-install] [-visual
] [-program command to run
] [-basic] [-slideshow] [-text]
[-meta] [-esc] [-bs] [-del] [-fast] [-fps]
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
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 xscreensaver-text
(1) program, which can be
overridden with -program
In text mode, it is also a fully functional (if anachronistic) vt100 terminal
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
- 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
xterm(1) and gnome-terminal(1) terminal emulators:
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
- 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 ioctl
(2) to fetch information about terminal
parameters and window size, which many programs (such as top
to run properly. apple2
will also set the environment variable
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
Notable X resources supported include the following which correspond to standard
TV controls: analogTVTint
, and analogTVContrast
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 warranty.
Television and Apple ][ emulation by Trevor Blackwell <email@example.com>.
Slideshow and text mode by Jamie Zawinski <firstname.lastname@example.org>. Pty and vt100
emulation by Fredrik Tolf <email@example.com>.