No this is wrong. I have a scan doubler for my CV643D and it DOES allow you to view PAL/NTSC games on (s)vga and LCD monitors. What it doesn't do is de-interlace pal and ntsc video, and show some other unusual modes like euro, and 28 hz 800x600 modes. It also does nothing to DBPAL and DBLNTSC Productivity Modes which are just passed thru and some svga monitirs can show some not. In other words if you have a pal or ntsc interlaced mode it will flicker on svga but YOU WILL SEE IT.
I also have a CV64 and this has a pass-thru so PAL modes are not scan doubled and will NOT show on most svga monitors. It is however faster than the CV643D, and it has the ROXXLER chip which does ?
PS You may be right about not scan-doubling, but in the DCE docs in your link this applies to non-AGA systems I have an A4000 and so i have not tested this in a non-AGA amiga
