cybervison 64/3D scandoubler in A3K

[Oldsmobile_Mike]

Not sure if it's helpful to you but here's a link to the manual:

http://amiga.resource.cx/manual/CyberVision643D.pdf

(second half is in English)

[Oldsmobile_Mike]

I've never owned a CV64/3D but out of curiosity, was this mod required because your video slot is damaged, and not providing the proper signal, or is it required on all A3000's?  I thought the CV64/3D was supposed to be a "drop in upgrade" for both A3000/A4000, and shouldn't require any additional motherboard modifications?

Also, did anyone ever determine if the scan doubler is ECS only, or does it also double AGA modes (if installed in an A4000)?

Just curious, thanks!

[Oldsmobile_Mike]

I liked all phase 5 products but never understood the cv643d ecs scandoubler

That seems really odd to design a board that only works with the A4000 (without modification), yet which is only compatible with ECS screenmodes.  Huh.  I did find a couple posts doing a google search from people who said it worked with AGA, one person said it worked but the colors appeared faded, etc.  Maybe it varies by board?  Ridiculous, where's the consistency?  :laughing:

[Oldsmobile_Mike]

I have a CV64/3d + Scandoubler in my A4000T if there is something you can suggest for testing.  I can't recall any washed out screens or other irregularities with normal use, though most things I do are RTG workbench and NTSC VideoToaster related.

In your system, does the scandoubler work with AGA screenmodes?

[Oldsmobile_Mike]

Anything above 12 bit (4096 colors) looks bad as far as i remember.

Anything above 12 bit is going to be HAM or HAM8 (18-bit 262,144 color AGA mode), so that's going to "look bad", in general.  Just because it's HAM.  Or do you mean "worse than normal HAM mode images"? :lol:

I don't own this card so I don't have a dog in the fight, I'm just curious why they would design a scan doubler that only fits properly in the A4000 video slot, but which doesn't support A4000 video modes (if that is in fact the case).

Forgive my ignorance but what constitutes an AGA screenmode? 32-64-128-256 color modes?

The Scandoubler doubles the 15k native modes so I don't expect it to do anything to the DblNTSC modes.

256 color screenmodes (NTSC Hi-res or NTSC Lo-res)??   Those are fine  and look great.  Interlaced modes work but are still interlaced (no  Flicker Fixer in the CV64/3d+SD).  Tried 32 and 256 color modes, they  look great.

NTSC or PAL Hi-Res Laced 256 colors would be an AGA screen mode, yes.  So if that looks great, then it sounds like the scan doubler does work with AGA modes.  LOL, think I need more coffee!