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1200XL - Clearpic or SuperVideo 2.1?


34 replies to this topic

Poll: Favored 1200XL Video Mod (22 member(s) have cast votes)

Which is the preferred video upgrade for the 1200XL?

  1. Clearpic Upgrade (4 votes [18.18%])

    Percentage of vote: 18.18%

  2. SuperVideo 2.1 (14 votes [63.64%])

    Percentage of vote: 63.64%

  3. Other (specify) (4 votes [18.18%])

    Percentage of vote: 18.18%

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#26 Gunstar OFFLINE  

Gunstar

    Gunstar

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Posted Fri Nov 17, 2017 11:04 PM

The Super Video 2.1 was written before ClearPIC2002.  Does anyone have a back to back comparison between this and the ClearPic2002?  I've never accomplished the Super Video 2.1, but I've upgraded a dozen 1200XLs with ClearPic2002.  The results are awesome. The quality of the ClearPic2002 is equal to or better than the original 800.

I think you answered your own question; the 800 has better video than other Atari 8-bits, yet it was also before XL's and XE's. But I'll clarify anyway, newer does not necessarily mean better, especially with the unique 1200XL video.

 

Oops, just noticed I already quoted and replied to this earlier...


Edited by Gunstar, Fri Nov 17, 2017 11:06 PM.


#27 slx OFFLINE  

slx

    Stargunner

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Posted Yesterday, 4:38 AM

Would the SV mod work/make sense for a 1200XL that‘s destined for a PAL conversion?


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#28 bob1200xl OFFLINE  

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Posted Yesterday, 11:24 AM

After many attempts at making a simple, effective video 'fix' for the 1200XL, I have come to believe that simple is best. The UAV is said to be the absolute best, but it adds a board to the system. This may interfere or conflict with other modifications. Many trials give high bandwidth displays, but some of the 'junk' in the video is best not seen.

 

My mod of choice is to replace R63, L15, and C115 with a wire, and add a wire from the emitter of Q8 to the CHROMA pin of J5. On my monitor (an MJ-22), in separate CHROMA, it looks great.

 

Your monitor may not look as good.

 

This leaves the CHROMA boost circuit in place.

 

All of these mods only work on a 1200XL.

 

You should correct the LUMA, as above, on a PAL system.

 

Bob



#29 bob1200xl OFFLINE  

bob1200xl

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Posted Yesterday, 11:30 AM

One more thing...

 

I connect the COMPOSITE signal to the CHROMA input of my monitor so I can maintain the s-video even on systems with no CHROMA signal (un-modified 1200XLs and 800XLs).

 

That way, I don't have to move plugs around when I change systems.

 

Bob



#30 ACML OFFLINE  

ACML

    Dragonstomper

  • 695 posts
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Posted Yesterday, 2:10 PM

My mod of choice is to replace R63, L15, and C115 with a wire, and add a wire from the emitter of Q8 to the CHROMA pin of J5. On my monitor (an MJ-22), in separate CHROMA, it looks great.

 

Bob

A Teknika MJ-22.  I used to have two back in the day.  Great monitors.  I parted with mine in 2004, when I was stupid and sold all my Atari hardware on eBay.



#31 Gunstar OFFLINE  

Gunstar

    Gunstar

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Posted Yesterday, 5:09 PM

Would the SV mod work/make sense for a 1200XL that‘s destined for a PAL conversion?


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If you look at my signature below, you will see mine is a 100% converted PAL 1200XL with SV 2,1. (Warp OS 32-in-1 includes PAL OS's)This is about the quality of the output video signal regardless of region/


Edited by Gunstar, Yesterday, 5:13 PM.


#32 Gunstar OFFLINE  

Gunstar

    Gunstar

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Posted Yesterday, 5:18 PM

 

 

This leaves the CHROMA boost circuit in place.

 

 

But does it repair the chroma boost circuit that Atari bungled like SV 2.1 does? Though regardless, this would mean that the repair of the chroma boost circuit from SV 2.1 could be incorporated into your mod. 


Edited by Gunstar, Yesterday, 5:20 PM.


#33 bob1200xl OFFLINE  

bob1200xl

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Posted Yesterday, 6:33 PM

It does not do anything to the CHROMA 'boost', although the CHROMA pick-off is different than the COMPOSITE circuit.

 

Bob



#34 ACML OFFLINE  

ACML

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Posted Yesterday, 8:58 PM

It does not do anything to the CHROMA 'boost', although the CHROMA pick-off is different than the COMPOSITE circuit.

 

Bob

So does ClearPic2002 take advantage of the chroma boost?  It would be hard for me to imagine the picture improving from ClearPic2002.


Edited by ACML, Yesterday, 8:59 PM.


#35 bob1200xl OFFLINE  

bob1200xl

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Posted Yesterday, 9:41 PM

ClearPic2002 bypasses the CHROMA boost circuits.

 

I don't think the fooling around that Atari did with the CHROMA circuits did much of anything for the monitor outputs. It really only makes sense on the RF output.

 

Bob






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