> That is, they weren't looking at whatever RGB output they had as the definitive version, but just as a rough guideline for how the image would appear on TVs.

> That is, they weren't looking at whatever RGB output they had as the definitive version, but just as a rough guideline for how the image would appear on TVs. Given that, whatever RGB the devkit might've been spitting out isn't "definitive" in the sense of how the artist intended anyone to see it. I don't think it's necessarily even very likely that they were looking at rgb from a devkit. These days people associate PVMs and other pro monitors with RGB but they aren't synonymous. Take a look through ebay listing for PVMs and you'll find plenty of composite or s-video-ish pro monitors from the 80s kicking around. And even some microcomputer monitors were composite. If the dev tooling they used was based on a C64 or Apple IIe (which also used 6502 cpus), that'd be composite out for eg., even with a designed-for-c64/appleIIe monitor. And I'm pretty sure I've seen photos of people using Apple IIe or similar for NES dev.