antique Amiga video problem

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We were cleaning out the shop for a move into a bigger area, and one of the things that was gonna hit the dumpster was a pristine Amiga 4000T. Likewise, I saved it and took it home. It's got a video toaster board in it, and works perfect! I've got a little 13 inch Amiga monitor with it too, but I'd like to use it with my nice Sony flat-CRT monitor. Only problem is that the Sony monitor goes out of sync when I plug it into the 15HD plug on the back.

Do Amigas have different pin-outs in their monitor connectors? I tried turning up the graphics resolution to at least 640X480, but the only thing it does is make a virtual desktop that overflows the viewable area, and doesn't really raise the actual resolution.

Any thoughts on getting this working on my newer monitor?

Is it an interlacing thing? I don't know anything about amigas, but maybe the video out is trying to drive the horizontal sweep at 15Khz instead of the normal 30Khz or so that VGA monitors like.

They have a video to VGA adapter...that might do the trick.

This explains the pin outs...scroll down.

http://www.epanorama.net/documents/vga2 ... nitor.html

You need for both native Amiga output and the toaster, a NTSC/PAL screen to be able to see anything.

Frequency output is in PAL 15KHz, NTSC somewhat higher.

Since it's a 4000T, native mode is PAL or NTSC frequencies, so that's probably why your monitor can't cope with the frequencies, except for that, it's just plain RGB with sync probably in the 23 pin connector.

It's fun to have a computer that boots entire OS from power-on in less than 4 seconds including loading the operating system from disc.