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    New Gpu940, New Egoboo2x

    Hi y'all. So, gpu940 was made faster. I used the supplementary FPS to add the lighting effects in Egoboo2x. New binaries are available here : http://download.gna.org/gpu940/ Both files are required, because the new egoboo2x binary works with the new gpu940 binary. So, copy everything onto...
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    New Port : Egoboo2x

    Finaly it's there : the first port using gpu940 for openGl rendering, and that's Egoboo. For those who don't know the game, have a look here for the PC version : http://egoboo.sourceforge.net The GP2X version can be found here : http://rixed.free.fr/egoboo2x.tgz (probably should be uploaded...
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    GP2X Sdl_openaudio Fails With Devkitgp2x

    I y'all ! Ive got a strange problem while porting a prog from PC to GP2X : when I use devkitGP2X, the prog runs OK except that SDL_OpenAudio allways returns -1 (Couldn't create mixer lock). when I use the official devkit for linux, the sound is OK, but the code generated by this older version...
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    Need Beta-testers

    Hi y'all ! Im porting a game to the GP2X, and it's nearly complete by now. There still is some issues, but I also want to test it on severall GP2X, so I need some beta-testers. Please PM me with the following infos if you are interrested : - GP2X edition - firmware version - overclockability...
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    GP2X Sdl Events Without Inititializing Video

    Hi ! On X11, to use SDL events without initializing VIDEO is tricky : one have to attach another X11 window to listen to it's event. What about the gp2x, where there are no such thing as X11 windows ? Is it then easily possible to receive events without initializing video (let's say, for...
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    My Atempt For A Gp2x Friendly Opengl Implementation

    Im still working on my software renderer gpu940 (that I used for the 'code alone' little demo). Lately, I was adding a GL-ES API to ease the use of the renderer. So far, I've just ported glxgears, which is not a very good example because of its waste of ressources (well, the purpose of...
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    Opengl-es 1.x

    Hi y'all ! For testing, Im looking for opensourced app/game that uses only the opengl-es 1.X library. GL-es 1.x supports only fixed point arithmetic, that's why its tedious to port any opengl app to opengl-es 1.x application : all values have to be converted from float to fixed by hand. Im...
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    GP2X Benchmarking Ram Writes

    Im benchmarking memory access from the 940. Im writting in a RAM region that's uncached and unbuffered. I was expecting that in this situation, writting 100M times at the same location or at random locations would change nothing. Surprisingly, this is not the case. Here are, in rought numbers...
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    GP2X Cycle Latency

    Hi y'all ! The ARM specs are a little too dry for me when cycle latency is concerned. Im interlacing many reads/writes (most uncached) and I wonder how exactly to predict wait clock cycle for RAM access, register usage, and such things. Any known doc out there for the ARMs 920/940 ?
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    GP2X Cycle Latency

    Hi y'all !
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    Dispint Irq

    Hi all ! The specs says that all IRQs can be routed toward the 920 or the 940. I cannot find any register to choose the target of the IRQs, so I assumed that in fact they were routed toward both the 920 and the 940. But after a few tests, I didn't manage to get the single IRQ (nor FIRQ) on...
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    Example Of Osd Working ?

    Hi! Im still working at my 3d renderer. I have changed from rendering to RGB layer to rendering into YUV region, which looks far better when lighting is on. I now want to use the OSD to display various statisticall datas, but I can't have it to display anything. Ive enabled it in register...
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    GP2X Regions Of Rgb Layer

    Hi y'all gurus ! According to the specs, region 5 is the 'background' region of the RGB layer. That is, if regions 1 to 4 are disabled and region 5 is enabled alone, you should have the whole screen covered by the RGB data. Anyway, all the code Ive found consider the region 1 as the...
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    Communication Between 920 And 940

    Im using both the 920 and the 940 (thx dzz and squidge), and Im having problems using a dedicated block of upper memory to pass commands from each others. This buffer is basically a circular buffer with two pointers, begining and end ; one beeing writen by the 920 and the other beeing written by...
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    Power Via Usb

    The topic says it all : while coding, the gp2x is continuously plugged into a USB port, so I think it should be cool if the gp2x could then drag it's power from this power supply, like any USB gadgets. So that we could play with it without the need for external power supply or battery set. So...
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    GP2X Hardware Dithering ?

    Finally I got some polygons rendered in the Gp2x. I wanted to enable hardware dithering (register 2946h) but apparently it's not working. Did someone managed to enable this in 16bpp mode ? I (lamely) rely on this feature to smooth my textures :-)
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    Usbnet From Linux Box Howto

    Here is a working procedure to get gp2x usbnet working with a linux box : Download g_ether from http://gp2x.sector808.org/g_ether.o download the 2.0 firmware, unzip it. then, unzip gp2xfs.tar.gz, extract g_ether, delete it, replace it with the new one, re-append that file to the archive, then...
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