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EvieSigma

Mac IIfx outputs green video

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I have a Macintosh IIfx with a Macintosh High-Resolution Video Card (supports 640x480 at 67Hz) and when running it through a 10-switch DB15 to VGA adapter set up in 13" RGB mode, I get green video. And by green I mean...really green.

 

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I'm using one of these adapters set for 13" RGB, mode 5, which is the only setting I've found that successfully outputs video.

 

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What could be causing the green tint? I'm wondering if maybe I need to set the adapter for Sync on Green instead...

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I was hoping that wouldn't end up being the case. I don't think I have a sync on green monitor so I guess I'm stuck with green vision until I buy another video card.

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I think all the Nubus era cards (and built in Mac video) was SOG. I just use old Sony Trinitron CRT monitors that handle SOG.

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Nothing beats a solid well cared for sharp Trinitron display.

 

I have a Samsung LCD that has no problem display video from my Q700 and Radius/SuperMac cards via a no-dip vga adapter. Do you have another adaptor to try

 

The Dell monitor you have should have SOG support. 

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1 hour ago, Unknown_K said:

I think all the Nubus era cards (and built in Mac video) was SOG. I just use old Sony Trinitron CRT monitors that handle SOG.

That would be great if I could find one of those and had the space for it.

 

Unfortunately I don't have another adapter. I suppose I could try and see if there's a menu option for handling the green signal.

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Have you ever tried vga/svga modes?Moreover i suggest 1467,14678,14679, 146789 combinations.

Macintosh High resolution video card 640*480*67 was recognized by "all" my LCD monitors!

Edited by Macbuk

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I'm using a slightly newer Dell LCD (Dell UltraSharp 1905fp) with a similar looking adapter and it looks like the switch table is the same so perhaps you'll have luck using the same settings I do.  It's worked on everything from base IIs with the Toby card on up through Beige G3s.  Using the Multiple Scan 21 setting I switch between Composite Sync 1 (1459) and Sync on green (149) depending on the machine and I have yet to find a machine that doesn't play nicely with one of those settings.

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Yeah, switching to the sync on green setting ended up fixing it. Now I can load it up with software.

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It's so much nicer having proper colors, though I wish 7.1.1 had desktop backgrounds built in. I really didn't want to install 7.5.5 off floppy disks though.

 

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