Pinout on 23 pin RGB to 15 pin VGA?

[Daedalus]

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...

[TheBilgeRat]

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.

I just got an Idek 17" that is probably doing this right here - All I get is flashing green power light with it attached.  would I put resistance on both sync lines?  If so how much?

[TheBilgeRat]

So, after a bit of research I came across this link for anyone else in my predicament and who wants to build this thing on their own:

http://amigadev.elowar.com/read/ADCD_2.1/AmigaMail_Vol2_guide/node015E.html

It looks like the original Commodore converters used a 74HCT08 as the intermediary in the Hsync/Vsync side and powered it off the +5 on the amiga side.

Of course, you could always buy it from Amigakit :lol:

But I've come too far already!  Damn the torpedoes!

[TheBilgeRat]

In fact, just in case amiga.org outlives that site, here is the diagram and its info:

A1-A14 are pins 1 - 14 on 74HCT08.
C1 is a .01uf 50A ceramic capacitor.