I have it on good authority from friends for the NES era,
Aha. Because looking at the schematics and the ICs used, that monitor would have by-the-book NTSC decoding, and if you also have the Hue knob at the detent position, you'll get very greenish yellows on the NES. It's because most NES games assume color #8 is yellow. However, color #8 is not actually yellow, it's 180 degrees phase, whereas true yellow is at 165 degrees phase, so it's greener than it should be. Which is why I would assume that either most didn't use that monitor after all, or they at least turned the hue knob minus 15 degrees.
I just like screwing around with things, so I wanted to see what the games would look like with the RGB PPU!
Well, now you know. It's not a pretty sight, in my opinion. Theoretically, I could take the raw RGB PPU values and convert them to display properly on an sRGB display.
I mean, is the SNES PPU also designed for a color temperature of 9300K on the monitor side, among other things?
I should clear things up a bit I guess.
The RGB NES PPU outputs hard-wired RGB voltages from values chosen by the chip designer. The SNES PPU outputs software-set RGB voltages from values chosen by the software developer.
RGB values are always *relative* to a color space, or color profile, defined by a monitor's red/green/blue/white primary chromaticities and gamma. The "correct" profile is whatever the designer/developer's monitor had, he chose the RGB values to look good on his monitor.
The NTSC broadcast system defines a particular color profile for North America, and different one for Japan. However, that only applies to broadcast video, there's no guarantee that a video game developer actually used a monitor of those specifications, because broadcast-quality "Grade 1" monitors are VERY expensive.
In reality, unless we ask the developer what monitor he used, it's only conjecture. However, a *rule of thumb* is that if a picture's reds and browns are too bright on sRGB with the 6500K white point, it's *probably* designed for 9300K. This certainly applies to the RGB PPU palette, as well as the old Nesticle one. On the other hand, we know that most monitors from the MS-DOS era had a 9300K white point, so most DOS games on sRGB look (slightly) wrong, not that most people notice.
While most standards, including sRGB, NTSC and PAL call for a 6500K white point, monitor makers liked and like the 9300K one because it 1) seems "brighter" to most people, and 2) it looks good even when the surrounding light comes from a fluorescent lamp. 6500K is the color of daylight and looks kind of reddish when the surrounding light comes from a fluorescent lamp.
Unfortunately, the schematics don't tell us what color chromaticities the 1084 has.