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btbfilms76

Atari System 1 Monitor Replacement and VGA out

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Well I’ve had a sick Roadblasters monitor since I acquired this a few years back. It was not great when I got it and little by little I watched it die slowly each time it powered on. I was loosing color and detail so I decided to switch out the old monitor with a 19in VGA monitor.... Well this became a tricky situation because unless you do a very deep information dive you migh run into some problems - as I did. But I figured it out and I’d like to share everything that I came up with.

 

CGA/EGA/YUV TO VGA CONVERTER Is the piece you need to purchase but mine arived with no instructions so right away I needed to go searching online for them.

https://www.mikesarcade.com/estore/datasheets/GBS-8200-booklet.pdf

Mikes Arcade really had some great tips however the cable that came provided did not work... at all. I thought I had a broken board.

The other problem is the video cables coming off the System 1 PCB were 7 in total and I only had 5 options on the new converter.

So RGB makes sense - what about the other 4 cables? Where do these go? Luckily I found this

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“The Scamatic Packet Suplement for the Atari System 1”. Now I’m able to see exactly what each color means. So instead of using the cables provided with the converter I soldered them directly to the board right at this point here.

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I used RGB Black and Brown. No V sync No H Svnc

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And then...

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I used the original monitor housing to mount the new VGA monitor, almost perfect fit.

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The bezel fit right over it on the front, no problem

 

The picture quality was amazing but not perfect, I was close but not perfect, and I need it to look the way I remember. Even after going through all output board menus - which are all in Chinese unless you change it to English. I tried to get it dialed in but it still was a little washed out - I found this.

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RGB fine tuning knobs, couple of twists and that did the trick.

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Perfect!

 

I hope you find this helpful.

No more of this...

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We’re all about this now.

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Superb work! It's great to see old hardware receive so much love.

 

The picture quality was amazing but not perfect, I was close but not perfect, and I need it to look the way I remember.

 

Interesting point about fidelity here. Eyes change enormously over the course of adulthood, losing the ability to discern as much detail and colour luminance. By restoring it to your memory (which, being human, I presume, is somewhat less than perfect anyway) it's possible you're actually over-compensating and making the colours brighter than they really were.

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Superb work! It's great to see old hardware receive so much love.

 

 

Interesting point about fidelity here. Eyes change enormously over the course of adulthood, losing the ability to discern as much detail and colour luminance. By restoring it to your memory (which, being human, I presume, is somewhat less than perfect anyway) it's possible you're actually over-compensating and making the colours brighter than they really were.

I feel like I've got bionic eyes now that I've had to get progressive lenses in my glasses.  I even make the "nuh-nuh-nuh" bionic sound when I use the bottom part of my lenses.  :rofl:

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