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testlinear(6)		      Svgalib User Manual		 testlinear(6)

       testlinear, lineart - test a linear frame buffer


       Program	to  test  linear addressing on Cirrus cards and	on Mach32 (and
       other cards which may support it).

       Selects 640x480x256 and tries to	enable a linear	frame buffer (its vir-
       tual  address  is  printed). Fills the screen in	some color, then draws
       pixels in random	positions.

       For Cirrus cards	some direct hardware access is then made for highspeed
       screen  access.	 Except	 for the last (Cirrus only) test no speeds are
       printed,	but you	are welcome to use 'time' to measure it.  The  program
       draws  714400 one byte pixels plus a forced 1s delay and	various	rand()
       calls for the pixels.

       The testlinear demo needs a few presses of <Return> after each  minimal
       demo  step.  Even when it does not prompt for it. When it appears to be
       stuck, just press <Return>.

       The lineart demo	is the same, but it accepts a command line with	an ar-
       bitrary	number	of  modes.   The  modes	 may be	either mode numbers or
       names, or both.	For example,

       lineart 11 17 G800x600x32k 22

       will give a display of mode 11.	If a key is pressed mode 17  will  ap-
       pear, followed by mode 20 and 22	as succesive keys are pressed.

       This  demo  is part of svgalib and can be found in the demos/ subdirec-
       tory of the original svgalib distribution. However, it is not installed
       in  the	system by default, s.t.	it is unclear where you	can find it if
       your svgalib was	installed by some linux	distribution. Even then,  when
       you  have  the demo on your system, you probably	won't have the sources
       s.t. it is only of limited use for you.

       In case of any such problem, simply get an  svgalib  distribution  from
       the  net.  You  even  don't need	to install it. Just make in the	demos/
       subdirecty. As of this writing,	svgalib-1.2.12.tar.gz  is  the	latest
       version	 and   can   be	 retrieved  by	ftp  from  at
       /pub/Linux/libs/graphics	and at  /pub/linux/sources/libs
       which will most probably	be mirrored by a site close to you.

       svgalib(7),    vgagl(7),	   libvga.config(5),	threed(6),   accel(6),
       bg_test(6),    eventtest(6),    forktest(6),    fun(6),	   keytest(6),
       mousetest(6),   scrolltest(6),	speedtest(6),  spin(6),	 testaccel(6),
       testgl(6), vgatest(6), plane(6),	wrapdemo(6)

       This manual page	was edited by Michael Weller  <eowmob@exp-math.uni-es->.	 The  exact  source  of	 the referenced	demo as	well as	of the
       original	documentation is unknown.

       It is very likely that both are at least	to some	extent are due to Harm
       Hanemaayer <>.

       Occasionally  this  might be wrong. I hereby asked to be	excused	by the
       original	author and will	happily	accept any additions or	corrections to
       this first version of the svgalib manual.

Svgalib	(>= 1.2.11)		 29 July 1997			 testlinear(6)


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