I experimented a bit more with the timing and tried to achieve higher resolutions. Here's an 800x600 mode:
http://downloads.qi-hardware.com/people/werner/ubb/vga/ubb-vga-800x600.jpg Here's 1024x768 using the same pixel clock (37.3 MHz): http://downloads.qi-hardware.com/people/werner/ubb/vga/ubb-vga-1024x768-33Hz.jpg The artefacts at the right border are FIFO underruns: the CPU cannot copy data fast enough to the MMC controller to keep up with the pixel clock. This is more visible in the following image: http://downloads.qi-hardware.com/people/werner/ubb/vga/ubb-vga-1024x768-36Hz.jpg This is with a 42 MHz pixel clock. The FIFO underruns cause all sorts of artefacts. Full disclosure: thsse high-res modes don't yet work as well as the screenshots suggest: if I try to display an image with more white pixels, the monitor still gets confused. - Werner _______________________________________________ Qi Hardware Discussion List Mail to list (members only): [email protected] Subscribe or Unsubscribe: http://lists.en.qi-hardware.com/mailman/listinfo/discussion
