From Processor To Display Post: 302462289

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

10-13-2010

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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?

ciNG

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LEARN ABOUT FREEBSD

pcap_can_set_rfmon

PCAP_CAN_SET_RFMON(3)					     Library Functions Manual					     PCAP_CAN_SET_RFMON(3)

NAME

       pcap_can_set_rfmon - check whether monitor mode can be set for a not-yet-activated capture handle

SYNOPSIS

       #include <pcap/pcap.h>

       int pcap_can_set_rfmon(pcap_t *p);

DESCRIPTION

       pcap_can_set_rfmon() checks whether monitor mode could be set on a capture handle when the handle is activated.

RETURN VALUE

       pcap_can_set_rfmon()  returns  0 if monitor mode could not be set, 1 if monitor mode could be set, PCAP_ERROR_NO_SUCH_DEVICE if the capture
       source specified when the handle was created doesn't exist, PCAP_ERROR_PERM_DENIED if the process doesn't have permission to check  whether
       monitor	mode  could  be  supported,  PCAP_ERROR_ACTIVATED if called on a capture handle that has been activated, or PCAP_ERROR if an error
       occurred.  If PCAP_ERROR is returned, pcap_geterr() or pcap_perror() may be called with p as an argument to  fetch  or  display	the  error
       text.

SEE ALSO

       pcap(3), pcap_create(3), pcap_activate(3), pcap_set_rfmon(3)

								    18 May 2010 					     PCAP_CAN_SET_RFMON(3)