[mark_k]

Another Merlin issue with KreisDemo. The program draws large circles in the middle of the screen after tiling the background with small circles. However with some resolutions, the large circles are too wide or too thin.

320x480: The large circles are too wide, wrapping around the left and right screen edges.
640x240, 800x300, 1024x384: The large circles are too thin horizontally.
1600x1200: Same wraparound issue near bottom of screen as with that resolution in TestBild.

With ScrollDemo, MagicColors and Mandelbrot, the mouse pointer appears locked at the top left of the screen. I wonder if on real hardware it is disabled/turned off?

Run Prefs/HRG-PrefsV1.14. You can click on any mode line from the list then click Test Mode to show a similar test image to TestBild. Here, the mouse pointer (a black/square crosshair) can be moved.

1600x1200 and 1920x1536 4 bit mixed mode: Similar wraparound issue. Also the mouse pointer movement is constrained to top half of screen.
320x480 8 bit packed: Mouse pointer movement constrained to left half of screen
160x120, 160x240 16 bit XGA: Pointer in left half of screen only
680x270 24 bit RGB: Pointer in top half of screen only
1016x762 15 bit Targa: Pointer in top half of screen only

Also, if you set Workbench screen mode to Merlin 1600x1200, the mouse pointer position is limited to top half of screen. But the actual pointer position (as far as Intuition sees it) is twice as far down the screen.