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Atari System 1 Monitor Replacement and VGA out


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4 replies to this topic

#1 btbfilms76

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Posted 15 January 2018 - 01:36 AM

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.mikesarc...200-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
DA136F7F-AD7E-49AC-9E4D-5F843C48DB8B.jpeg
“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.
3C2AA9E2-D008-44B2-90FC-2D16755AC9F2.jpeg
I used RGB Black and Brown. No V sync No H Svnc
57FE5B07-435C-4131-9521-4DA5D0248B09.jpeg
And then...
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#2 btbfilms76

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Posted 15 January 2018 - 01:42 AM

Just when things started to get rolling the smell of smoke and burning electronics became present.
Tho old power switcher took a dive.
258EEECD-BD6C-4FD6-9EB4-C416BF6C2A82.jpeg

So after a visit to Amazon and two days later. A brand new one showed up and we’re back on track.
AB90A401-2DD3-46B4-A664-494E3848CEFD.jpeg
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#3 btbfilms76

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Posted 15 January 2018 - 01:56 AM

I used the original monitor housing to mount the new VGA monitor, almost perfect fit.
0165EF4A-F028-4D73-A1B2-62C77EDFAEE2.jpeg
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.
E7ECD590-FEFE-4095-AACD-196F67E6E785.jpeg
RGB fine tuning knobs, couple of twists and that did the trick.
8BFE0537-9493-446E-AC7A-728E33C0CE23.jpeg
Perfect!

I hope you find this helpful.
No more of this...
A303B4C2-BC74-4301-A4E9-C4BD99B14845.jpeg

We’re all about this now.

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#4 dgrubb

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Posted 15 January 2018 - 04:49 PM

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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#5 RickR

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Posted 15 January 2018 - 06:50 PM

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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