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Picasso II (and other GD-CL54xx based cards) scrolling fixed. VRAM reads (that are usually very rare) were not working correctly in some situations.
A2410: No idea, need to check the sources. NetBSD clears the VRAM, sets RAMDAC palette and other settings etc. But then it never writes anything to overlay (part of "program" RAM bank) RAM. If I remember correctly, NetBSD uses RAMDAC overlay feature as a text console screen.
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