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Author Topic: Pinout on 23 pin RGB to 15 pin VGA?  (Read 13572 times)

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Offline TheBilgeRatTopic starter

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Pinout on 23 pin RGB to 15 pin VGA?
« on: February 28, 2011, 07:48:22 PM »
Anybody have the pinouts for a 23 pin RGB to 15 pin VGA adaptor?  I'd like to do a DIY since I have the pieces parts.
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Offline Franko

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Re: Pinout on 23 pin RGB to 15 pin VGA?
« Reply #1 on: February 28, 2011, 07:54:53 PM »
Quote from: TheBilgeRat;618481
Anybody have the pinouts for a 23 pin RGB to 15 pin VGA adaptor?  I'd like to do a DIY since I have the pieces parts.


Yes... :)
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Offline TheBilgeRatTopic starter

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Re: Pinout on 23 pin RGB to 15 pin VGA?
« Reply #2 on: February 28, 2011, 08:05:10 PM »
Quote from: Franko;618485
Yes... :)

Care to share it? :D
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Offline Franko

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Re: Pinout on 23 pin RGB to 15 pin VGA?
« Reply #3 on: February 28, 2011, 08:06:16 PM »
Quote from: TheBilgeRat;618487
Care to share it? :D


Maybe... :)
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Offline AndyFC

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Re: Pinout on 23 pin RGB to 15 pin VGA?
« Reply #4 on: February 28, 2011, 08:09:47 PM »
The Amiga RGB pin out is here: http://www.ntrautanen.fi/computers/hardware/misc/amiga_rgb.htm
VGA pin out here: http://www.l-com.com/content/Audio-Video-Tutorial.html

I built one and linked the RGBs, the H and V syncs and a ground.
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Offline TheBilgeRatTopic starter

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Re: Pinout on 23 pin RGB to 15 pin VGA?
« Reply #5 on: February 28, 2011, 08:13:43 PM »
Quote from: AndyFC;618490
The Amiga RGB pin out is here: http://www.ntrautanen.fi/computers/hardware/misc/amiga_rgb.htm
VGA pin out here: http://www.l-com.com/content/Audio-Video-Tutorial.html

I built one and linked the RGBs, the H and V syncs and a ground.

the analog or digital RGB?  Also, that link suggested that modern monitors want something on the 15 pin.  VGA pinout says its a data clock... Wonder if pin 1 on amiga 23pin and pin 15 VGA would be happy together...
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Offline Franko

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Re: Pinout on 23 pin RGB to 15 pin VGA?
« Reply #6 on: February 28, 2011, 08:17:33 PM »
While I don't have a proper schematic (only a hand drawn one I did years ago), here's the links to the appropriate pinouts, just remember of course that the monitor your using will have to be able to sync down to proper PAL/NTSC refresh rates 15/16Khz... :)

Amiga Video Port PinOut...

VGA Connector PinOut...

(oops... AndyFC beat me to this one... :))
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Offline Franko

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Re: Pinout on 23 pin RGB to 15 pin VGA?
« Reply #7 on: February 28, 2011, 08:23:09 PM »
Quote from: TheBilgeRat;618492
the analog or digital RGB?  Also, that link suggested that modern monitors want something on the 15 pin.  VGA pinout says its a data clock... Wonder if pin 1 on amiga 23pin and pin 15 VGA would be happy together...


Analog of course unless you're monitors digital only...

Never needed to use pin 15 on any old monitors I've tried before, just been a straight forward pin for pin connection... :)
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Offline Zac67

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Re: Pinout on 23 pin RGB to 15 pin VGA?
« Reply #8 on: February 28, 2011, 08:28:13 PM »
Quote from: TheBilgeRat;618492
the analog or digital RGB?


Forget digital RGBI - that's CGA compatible with the same terrific colors.
With VGA the PC went analogue as well (until DVI/HDMI/DP/DiiVA surfaced).
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Offline TheBilgeRatTopic starter

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Re: Pinout on 23 pin RGB to 15 pin VGA?
« Reply #9 on: March 01, 2011, 12:06:02 AM »
sweetness - +5V, gnd, R, G, B it is, then! :D
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Offline mongo

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Re: Pinout on 23 pin RGB to 15 pin VGA?
« Reply #10 on: March 01, 2011, 12:19:42 AM »
Quote from: TheBilgeRat;618541
sweetness - +5V, gnd, R, G, B it is, then! :D


R, G, B, VSYNC, HSYNC, and GND.

No +5V.
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Offline Louis Dias

Re: Pinout on 23 pin RGB to 15 pin VGA?
« Reply #11 on: March 01, 2011, 02:05:48 AM »
I find this site quite informative:
http://pinouts.ru/
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Offline TheBilgeRatTopic starter

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Re: Pinout on 23 pin RGB to 15 pin VGA?
« Reply #12 on: March 01, 2011, 06:20:22 AM »
Quote from: mongo;618543
R, G, B, VSYNC, HSYNC, and GND.

No +5V.


Yikes!  my bad - will rock it proper.

I'm still at "pulling the really stuck 23-pin terminals out of the ancient plastic block" phase of the operation.
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Offline Zac67

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Re: Pinout on 23 pin RGB to 15 pin VGA?
« Reply #13 on: March 01, 2011, 07:25:02 AM »
Some CRTs reportedly load the sync signals too heavily. If Miggy fails to boot up, don't be alarmed - you'll need to add serial resistors or add a transistor for signal boost.
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Offline Daedalus

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Re: Pinout on 23 pin RGB to 15 pin VGA?
« Reply #14 on: March 01, 2011, 08:47:22 AM »
The data connections shouldn't be *required* by a modern monitor, and Amigas can't read them on the RGB connector anyway. The main reason for a data connection is monitor->PC communication about monitor capabilities, the monitor gets all the information it needs about the picture from the sync signals.

I think there are a few diagrams on Aminet in hard/docs or hard/hacks which show how to make a simple connector, and a simple buffered one using a transistor, resistor and the +5V from the Amiga. I'll rummage around at home and see if I can find it...
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