Cybervision64 in A4000 Desktop

[cgutjahr]

Yes, Framiga is right - you need to install the latest version of Cybergraphics and your problems will vanish.

CGX has a bug: it checks at startup if your AmigaOS revision is compatible with CGX (e.g., CGX won't run on OS1.x). However, instead of checking it this way:

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is current AmigaOS version *bigger* then minimum required version?

this is what CGX does:

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is current AmigaOS version *equal* to any of the known compatible versions?

With BB2, the part of the ROM that CGX examines to retrieve the AmigaOS version (exec.library) was updated - now it has a version number that CGX does not know about. Hence the test fails and CGX refuses to work properly. This behaviour was fixed in the later revisions of CGX.