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Tektronix TDS744 CRT to LCD color converter FPGA module DIY

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TerrySt:
Here is the latest version of my VHDL code that uses the LVDS transmitters in the FPGA instead of using external LVDS converter chips.

Terry

ltarjanyi75:
Terry, your code works wonderfully on my Spartan 3 board also!

I just had to make one modification: I reverted back to the process in your previous version, where you examined the CLK_175 and CLK_25 in the same process. After that everything works correctly: changing colors, intensity, etc. 
Without this modification I just had some blue and black pixel "noise" on the LCD. Don't know why exactly...

But anyway it is super cool!!! Thanks for your help!

TERRA Operative:
Just made some modified mounting plates, adjusted as per TerrySt's modifications (I derped the design somehow... :P )

I included STEP files for a thicker 3D printable mounting plate that doesn't need standoffs, and the original that can be cut from aluminium plate with the use of 2mm tall standoffs.

TERRA Operative:
Hey, ltarjanyi75, would you mind releasing your schematics/PCB files if it is all working perfectly? :)



Also, how hard would it be, or would it even be possible  to get something like the Lattice LCMXO2-256HC-4TG100C working? (I have practically no programming experience however...)
I can get them in Akihabara for cheap. :)
https://www.latticesemi.com/view_document?document_id=38834

Where is everyone buying their Spartan 3 chips?

ltarjanyi75:
Yes, I can share the details, I just need some more time to fix my design errors and test before that.

I quickly checked the datasheet of the family of PLD you sent and I think it could work with one of those also. Here is the brief resource usage summary of the code for Spartan 3 and these fit into the specs:
- Number of Slice Flip Flops: 51
- Total Number of 4 input LUTs: 172
- Number of bonded IOBs: 31
- Number of DCMs: 1
These devices also have on-chip flash for configuration, so no external flash would be required if I'm correct.
Maybe I will give a try later to check the development tool for this device and try to compile the code...

I bought my Spartan 3 chips from Aliexpress, about 8 USD each (+ shippping). Bought 2 of them and they work perfectly.

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