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New development: GTIA in CPLD


405 replies to this topic

#401 dragos OFFLINE  

dragos

    Moonsweeper

  • 272 posts
  • Location:Indianapolis, IN

Posted Sun Mar 19, 2017 10:10 PM

I am interested, still available?



#402 Synthpopalooza OFFLINE  

Synthpopalooza

    Stargunner

  • 1,241 posts
  • Location:knoxville, TN

Posted Yesterday, 9:53 PM

Finally installed the Sophia in my 1200XL this morning.  Very easy except that it seemed to take a bit more of 'electronics level violence' than expected to get the Sophia socket into the 1200XL motherboard socket.  I'm going to assume that the GTIA isn't going back into that (now likely loose in comparison to previous) socket by itself again.

 

Output is very clear, however my text is lime green instead of the expected white...    :P

 

 

LWiBMw.png

 

 

Same display/capture settings with the UAV:

 

 

ReviOc.png

 

The lime green is because Sophia now allows for independent programming of the text color in Graphics 0 seperately from the background.  Therefore the text is set to the system default, which is lime green, the same color used for that register in Graphics 1 as well.



#403 Lilralphie OFFLINE  

Lilralphie

    Space Invader

  • 20 posts

Posted Yesterday, 9:58 PM

Stupid question - but are the colors OK for a 5200 install?



#404 Simius OFFLINE  

Simius

    Moonsweeper

  • Topic Starter
  • 371 posts
  • Location:Warszawa, Poland

Posted Today, 4:39 AM

 
Yes, I see pixels in the Sophia RBG output in the same area that do not appear in the UAV s-video.
 
 
uHDgyg.png

 

 

The gray streaks are the result of 16 level luminance of each color register instead 8 level in GTIA. The genesis of the bad pixel on the cap I have not identified yet.



#405 Simius OFFLINE  

Simius

    Moonsweeper

  • Topic Starter
  • 371 posts
  • Location:Warszawa, Poland

Posted Today, 4:43 AM

Stupid question - but are the colors OK for a 5200 install

 

The colors in the 5200 are exactly the same as in the XL/XE.



#406 Larry OFFLINE  

Larry

    River Patroller

  • 3,760 posts
  • Location:U.S. -- Midwest

Posted Today, 4:53 AM

@Simius-

 

Can you have an "NTSC palette" that can be re-programmed in the CPLD -- or specify which version we want on future orders, and then you can send the appropriate type?

 

-Larry






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