🇵🇱 Seban/Slight 🇺🇦Some time ago, @RZoG asked me to mod his Atari 2600 Junior (PAL version) to have an S-Video output, so I had the Atari 2600 on my bench over the weekend.
🧵 1 of 9
... I decided to design a small PCB with a new luma DAC, chroma amp, and audio buffer. The PCB arrived some time ago, so it was a good time to open the 'victim'...
🧵 2 of 9
The next step was to remove the RF modulator and take some measurements. There were more components to remove, including the audio subcarrier generator and the onboard chroma-luma mixer...
🧵 3 of 9
The next step was to connect the new audio-video board, but first, I needed to prepare a cable with the required signals from the TIA chip...
🧵 4 of 9
The new PCB is now connected and placed in the old RF modulator's location, so it was time for some tests and to check the video signal quality...
🧵 5 of 9
Ha! It looks quite promising! :) The video quality on a low-budget TN LCD monitor is clean and sharp! :)
🧵 6 of 9
The colors are crisp and vivid! :D So I think the mod was a success!
🧵 7 of 9
It's time to clean up the board, remove other unnecessary components, and finish this little weekend project. RZoG designed a very nice connector housing and then printed it on a 3D printer... it fits perfectly! :)
🧵 8 of 9
Some spare parts are left! :D They will wait for better times—maybe for the resurrection of another Atari 2600? :D
So that's all for today! :D But the queue of 'little projects' is not empty... so soon (I hope!) there will be another little diary-style entry. :)
🧵 9 of 9
