Related version: V0.8.8R8
In OS 1.3, screens with 4 bpp (16 colors) in high resolution (640) and PAL videomode (256 or 512 pixels) appear faulty shown as follow:
For comparison, the same in correct manner (Note: only 480 pixels shown instead 512):
Note: This effect occurs only with 16 colors (4 bpp), hires and PAL resolution at the same time, 3 bpp (8 colors) works correctly or select NTSC resolution (200 or 400 pixels). Download configuration file