Thanks to everyone who picked up a v1.0 board on VCFMW, hope your build goes well. Now it's time to plan for v1.1. Here's my initial thought on changes...
1. Fix all the v1.0 errata (missing traces), including the factory bodge needed on U73 (the video ROM).
2. I had a hard time getting a Goldstar branded 74LS123 working well in U38, until I cut the traces to ground on the Cext pins. This is mentioned in one of the Cornucopia articles and ground connections generally do NOT appear on the
74LS123 datasheets, with those pins already being internally grounded in the package. It's also hand annotated on one of the schematics for this board floating around on the net. Finally it would allow for easy use of 74LS221's in their place, which are fully temp and voltage compensated and said to help with video jitter in another Cornucopia article.
3. Add a couple spots for optional tantalum caps on the +5V rails in the video section which again is said to help with video jitters. I'm thinking between C11 and 12, by U38 and U51, and right below U60 which already has an open via on the ground bus.
4. And this one I'm really on the fence on, but since the 4MHz mod seemed pretty popular back in the day, and seems to work well on the original board I restored that had it, doing a few changes over in the Y2/U96 area of the board to allow for this mod without having to cut traces or bend chip legs out, and solder on additional wires. I think I can do it all via solder jumpers on the back side so it wouldn't change the appearance from above.