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Re: machfb (sort of) working on Mach64 GX



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Hello,

On May 3, 2011, at 10:30 AM, John D. Baker wrote:

On Tue, 3 May 2011, Michael wrote:

dsp_precision = 4, dsp_loop_latency = 10,
mclk_fb_div = 228, vclk_fb_div = 181,
mclk_post_div = 2, vclk_post_div = 2
/* above is the last legible line printed at the bottom of the screen */ /* everything from this point forward is compressed into the upper- left */ /* 1/16th of the screen (1/4 width, 1/4 height). As such it is just an */ /* illegible jumble of gray and white vertical bars littered with pixel */
/* garbage that would be the screen text. */

Does the line above remain visible / readable? If it does then the mode setting code is actually doing the right thing and we screw up somewhere initialising the drawing engine.

Yes.  The lines between the "screen goes black, these lines scroll up"
comment and the above comment block remain readable as long as the
machine is running.  Console/ttyEn output makes the pixels dance in
the upper-left region of the screen as noted.

Is the garbage in the upper left corner black & white ( and maybe green ) or is it more like random colours? I looked at the engine initialisation code, it follows the mach64 manual pretty much exactly. Now I'm checking what Xorg's mach64 driver does differently.

have fun
Michael

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