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Full Discussion: From Processor To Display
Top Forums Programming From Processor To Display Post 302462289 by ciNG on Wednesday 13th of October 2010 08:43:23 PM
Old 10-13-2010
From Processor To Display

What is the programming side of the keyboard's PrintScreen?
When I hit this button, what is the computer doing to give me the image that my monitor is displaying?

In the same arena, how does the computer tell the monitor what to display visually? I move the mouse and the cursor appears to be moving as a result of my manipulation, but I know it is some intricate process of programmed communication. What is happening here? not so much in lay men's terms but to the grit of it.

If I wanted to write code to alter what and how the monitor is told to display, and also how the mouse and keyboard receive their information and send it to the monitor... what languages and or avenues ought I look into? Is this all machine language? assembly? higher?
 

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dbus-monitor(1) 					      General Commands Manual						   dbus-monitor(1)

NAME
dbus-monitor - debug probe to print message bus messages SYNOPSIS
dbus-monitor [--system | --session | --address ADDRESS] [--profile | --monitor] [watch expressions] DESCRIPTION
The dbus-monitor command is used to monitor messages going through a D-Bus message bus. See http://www.freedesktop.org/software/dbus/ for more information about the big picture. There are two well-known message buses: the systemwide message bus (installed on many systems as the "messagebus" service) and the per-user-login-session message bus (started each time a user logs in). The --system and --session options direct dbus-monitor to monitor the system or session buses respectively. If neither is specified, dbus-monitor monitors the session bus. dbus-monitor has two different output modes, the 'classic'-style monitoring mode and profiling mode. The profiling format is a compact for- mat with a single line per message and microsecond-resolution timing information. The --profile and --monitor options select the profiling and monitoring output format respectively. If neither is specified, dbus-monitor uses the monitoring output format. In order to get dbus-monitor to see the messages you are interested in, you should specify a set of watch expressions as you would expect to be passed to the dbus_bus_add_match function. The message bus configuration may keep dbus-monitor from seeing all messages, especially if you run the monitor as a non-root user. OPTIONS
--system Monitor the system message bus. --session Monitor the session message bus. (This is the default.) --address ADDRESS Monitor an arbitrary message bus given at ADDRESS. --profile Use the profiling output format. --monitor Use the monitoring output format. (This is the default.) EXAMPLE
Here is an example of using dbus-monitor to watch for the gnome typing monitor to say things dbus-monitor "type='signal',sender='org.gnome.TypingMonitor',interface='org.gnome.TypingMonitor'" AUTHOR
dbus-monitor was written by Philip Blundell. The profiling output mode was added by Olli Salli. BUGS
Please send bug reports to the D-Bus mailing list or bug tracker, see http://www.freedesktop.org/software/dbus/ dbus-monitor(1)
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