This diagram from the manual I can grok! My guess it that the single wire between card and neck board carries the grayscale intensity and the rest is for timing? Nice that neither patent drawing no Manual illustration include the complexity of doing external monitor support, that's a big plus for me. KISS = KIAIS - Keep It All Internal Stupid
This one I not, so I'll do a markup of the pretty one in AI for future reference. Looks like it is indeed VOUT connected directly to GS neck board from VidCard. Silly of me to think in terms of RGB bundling, that's backwards. Need to do that for going from B&W output to an RGB display at a usable brightness level, not applicable here, the VidCard will ONLY do GS (and maybe B&W for compatibility?) if and when.
Looks to me like the "Horizontal" problems with the two hacks we're referencing would be that those signals are generated by the logic board, derived from the system clock there and missing in their application of using A/B and neck board/CRT as a display sans mobo.
We'll need to either jury rig something for using those signals from the lobotomized mobo of the host Mac to hijack its components as an external monitor for my IIcx or provide a makeshift solution as they did?
Looking in another PDF I read that the Classic Mac series (128k-Plus) differs from the SE/SE30 A/B. No fun as I was aiming this kluge at a spare Plus.
edit: YAY! For the first time ever I think, crucial illustrations for the next phase of a project rolled directly over at a page break!
That's quite an envious collection of classic DTP CRT Displays. Any chance of doing a photo shoot so we can see them lined up and from all angles?
edit: check out that Q&A before firing the Radius monitors up. Early models operated at two different frequencies and required properly matched video cards. I wouldn't try a gender changer to use the same DE-9 "serial cable" interface display with different cards for example.
That FPD/gs sounds like a beautiful thing.
Yeah, a straight through serial cable will work. Note you'll get ghosting without a shielded cable though. I picked up a 9 pin straight through cable meant for video on a KVM of sorts I've been meaning to try but haven't got around to it yet.