CyberVision64/3D Icons and window contents disappear while moving windows (030 CPU) Type of Failure: After moving windows on the workbench of a Zorro II Amiga with a 68030 CPU The icons will only be displayed by text and not with graphics. Sometimes the whole window contents disappear. Cause: On a Zorro II computer with a 68030 CPU a MMU tables need to be initialised by a library call in order to make the Zorro-II range uncacheable. If this MMU initialisation is missing, reads and writes to video memory and graphics chip registers may only refer to the cache and not to the real locations. Because of that, any graphical elements may not get correctly redrawn. Solution: On a 68030 Amiga, please install the "ENFORCER" or a similar program which will initialise a MMU table to state the Zorro-II range as uncachable.