Changes

|320x240, 256x224, 256x240, 512x224, 512x240, 640×480, 512x448, 512x480, 672x480, 720x240, 720x480, 768x240, 768x480, 544x608, 400x240, 416x768, 384x864, 320x960, 800x640, 1024x480, 1024x960, 1024x768, 1280x480, 1280x960 <ref group=O name=dc2>These are from the DreamHAL documentation, as a rule 1. the Dreamcast has a fixed pixel clock, adding more vertical lines or increasing the refresh rate will reduce the horizontal resolution, 2. if PowerVR is to be used, the resolution needs to be a multiple of 32 due to tiling</ref>