Well, that aside, another way to view the output of these devices would be to use the standard composite video out to your TV. So I take my Apple IIGS, hook up the composite out directly to the TV's video in and ...
As you can see, the stuff that are supposed to be in black and white are tinted with color fringes. This would be somewhat acceptable for games and applications with mostly graphics. If you are using it with 80 column text, or graphical text, you will soon get a headache from trying to read it. The Apple IIGS composite video circuits automatically disable the colour burst signal so you get something in black and white. This improves the readability somewhat but on screens with combined graphics + text you get the same problem. That is the main reason why the came out with RGB monitors.
Well, my TV has the standard Y Pb Pc component input. If you connect something meant for RGB to it, it works, everything is as clear as RGB, but with the wrong colours. That's a good enough start for me. After searching around for a DIY RGB to component converter, I found one in my local electronics store already packaged as a kit. It was published as a Silicon Chip article. I proceeded and assembled the kit. After that, I think the TV expects the SYNC signal with the luminance (Y) signal, or it just displays the "no signal" blue background.
A quick question to Tony Diaz (thanks Tony) gets me what I needed. It is safe to just tie the composite SYNC signal with the Green output to have "Sync on green". After wiring a makeshift D15 IIGS RGB with wires leading directly to the RGB to component converter I finally have the results I was hoping for. Here's are comparisons of using the composite "video in" image and the "RGB converted" image.
Close up of the converted image. Note the clear black and white text.
Last 2 are pictures of the Tour of the Apple IIGS. They are "graphical text". You should be able to tell which is which ;)
Another 2 images for comparison... again you should be able to tell which is which.