Powergraph rev1 vs rev2 how can i find out

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By Manuel

Ascended (18162)

Manuel의 아바타

23-04-2021, 22:11

Why not contact the seller?

By valkyre

Hero (560)

valkyre의 아바타

23-04-2021, 23:48

I will try to dig out the information that I used to make my lead and pcb mod

By valkyre

Hero (560)

valkyre의 아바타

23-04-2021, 23:58

@daemos. Look on msx calamar- powergraph , all the info that I used is still there.

By Daemos

Paragon (1952)

Daemos의 아바타

24-04-2021, 11:04

Valkyre,

That did the trick. All the info I found there layed down the last pieces of the puzzle. I finally managed to figure out the pinout of the powergraph output. I see what they did there with the pcb mod. I made a new cable and finally there is a crystal clear image.

Thank you for thinking along and sharing the info.

By Manuel

Ascended (18162)

Manuel의 아바타

24-04-2021, 11:42

So, what was wrong?

By Daemos

Paragon (1952)

Daemos의 아바타

24-04-2021, 12:30

First problem is that the pinout of the output cable is documented but not precise. Finding out the revision nr was a challenge by itself but then figuring which pinout is correct was some other business. The calamar blog shows pin 5 connected to pin 21 which hinted that the correct sync signal should be there. The rest from there is easy. Trying all the pins until red/blue and green matches and voila a perfect image. The monitor should be set to srgb or else the image is too dark and greyish. It looks perfect now.

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