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Special Forums Hardware question Post 302530717 by Lillian on Tuesday 14th of June 2011 11:34:43 PM
Old 06-15-2011
Double screen is to use a two-headed output graphics CARDS by two displays. Now almost all the video card is double the output, a VGA a DVI, two DVI or is a DVI a HDMI. Pick a display, only use VGA or DVI (according to different types of display interface and then dual monitor, will be two display from the VGA video card respectively and DVI, if no DVI input, can monitor with DVI turn VGA adapter, will the DVI to VGA video card.
Test Your Knowledge in Computers #394
Difficulty: Medium
POSIX mandates 1024-byte default block sizes for the df and du utilities, reflecting the typical size of blocks on disks.
True or False?

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VGA(8)							      System Manager's Manual							    VGA(8)

vga - configure a VGA card SYNOPSIS
aux/vga [ -cdilmpv ] [ mode ] DESCRIPTION
Aux/vga configures a VGA controller for various display sizes and depths. Using the monitor type specified in /env/monitor (default vga) and the mode given as argument (default 640x480x1), aux/vga uses the database of known VGA controllers and monitors in /lib/vgadb (see vgadb(6)) to configure the display via the devices provided by vga(3). The options are: -c force the use of the software cursor even if the VGA card is capable of using a hardware graphics cursor. -d include the color palette in whatever actions are performed, usually printing the contents. -i when used with -p display the register values that will be loaded. -l load the desired mode. -mmonitor override the /env/monitor value. /env/monitor is usually set by including it in the plan9.ini file read by the PC boot program -p print the current or expected register values at appropriate points depending on other options. -v print a trace of the functions called. Mode is of the form XxYxZ , where X, Y, and Z are numbers specifying the display height, width, and depth respectively. The mode must appear in /lib/vgadb as a value for one of the monitor entries. The usual modes are 640x480x[18], 800x600x[18], 1024x768x[18][i], 1280x1024x[18][i], 1376x1024x8, and 1600x1200x8. A trailing indicates interlaced operation. EXAMPLES
Change the display resolution: aux/vga -l 1600x1200x8 Print the current VGA controller registers. It is usually best to redirect the output of a -p command to a file to prevent confusion caused by using the VGA controller while trying to dump its state: aux/vga -p>/tmp/x Force the VGA controller to a known state: aux/vga -m vga -l Print the current VGA controller state and what would be loaded into it for a new resolution, but don't do the load: aux/vga -ip 1376x1024x8>/tmp/x FILES
/env/monitor display type (default vga). /lib/vgadb VGA configuration file. SOURCE
/sys/src/cmd/aux/vga SEE ALSO
vga(3), vgadb(6), BUGS
Aux/vga makes every effort possible to verify that the mode it is about to load is valid and will bail out with an error message before setting any registers if it encounters a problem. However, things can go wrong, especially when playing with a new VGA controller or moni- tor setting. It is useful in such cases to have the above command for setting the controller to a known state at your fingertips. VGA(8)

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