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Tonyvdb

RGB to VGA adapters

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Note, I'm not an advocate of the "solder a jumper" on the motherboard method here. If you can wire up your own DB15 connector breakout, that's a better solution.

 

DB15 -> VGA
2 -> 1 (Red Analog)
5 -> 2 (Green Analog)
9 -> 3 (Blue Analog)
1 -> 6 (Blue Ground)
7 -> 7 (Green Ground)
13 -> 8 (Blue Ground)
3 -> 13 (Composite Sync)

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The GBS can be tweaked to make the image position correctly, but it is still not very crisp on my GS. I also tried a 15KHz monitor directly, but that didn't recognize the //GS at all (but works fine on an Amiga and ST.)

 

A2Heaven has some manner of RAMworks card that has a VGA option, but it has been perpetually out of stock since the site opened.

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So an old Amiga 1084 monitor wont work on the GS? I have a nice 13" Sony trinitron that I may just use for now. The monitor that I got with the GS is just the monochrome one that only has composite in.

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Note, I'm not an advocate of the "solder a jumper" on the motherboard method here. If you can wire up your own DB15 connector breakout, that's a better solution.

 

DB15 -> VGA

2 -> 1 (Red Analog)

5 -> 2 (Green Analog)

9 -> 3 (Blue Analog)

1 -> 6 (Blue Ground)

7 -> 7 (Green Ground)

13 -> 8 (Blue Ground)

3 -> 13 (Composite Sync)

Ok, Ive picked up a GBS8220 I just want to confirm that I still need to build the adapter above as I agree, Im not going to solder anything directly on the MB of the GS

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Yes. You can also use P11 on the GBS-82x0 board, but you'll need the DB-15 side connector still. The GBS-82x0 side of the P11 connection (including wires) should be provided with the GBS-82x0 assembly.

 

DB15 -> P11 input (GBS-82x0)
2 -> Red (Red Input)
3 -> Gray (Composite Sync)
5 -> Green (Green Input)
13 -> Black (Blue Ground which acts as a common ground to Red/Green/Blue)
9 -> Blue (Blue Input)
Yellow is not needed on the P11 input

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