Heads up: almost all SVGs for VFD games are changed. That means your romsets need to be updated. I don't care much about pokerom collectors, but for the people that play these games it's a bit annoying. (to be clear: does not apply to SVGs for LCD games like Game&Watch)
Main reason: I unscrambled all the segment IDs. So, all those long bitswap statements in the driver source are removed. I used a script to automate it. While I was at it, I also tweaked the colors a bit. The only one really visible is the red one, it's less orange now. On the plus side, it uncovered (and fixed) a few bugs too. eg. a couple of the maze segments in eturtles had the wrong ID.
Oh wow, did you update all the existing ones? I've been meaning to get back into those and clean up the quickly made ones, just never can seem to find the time...
It's on a TMS2670 It was already decapped/dumped a year ago, but MCU emulation wasn't added to MAME until recently, when Sean obtained a TMS2100/2300 doc.
If it's green, it just means the colors have degraded a lot after all these years.
I think it applies to more VFD games, but it's very hard to tell which ones were originally yellow, when all video references are relatively recent. It doesn't help when games have touched-up photos on the box. Tomy Tron's box art has yellow instead of green for example, but does not look like an untampered VFD photo. Or even fake VFDs in commercials, like Epoch Dracula here:
VFD colours often get massively changed by a plastic overlay. E.g. my VHS recorder Panasonic NV-HD625 has a VFD in yellow with some red segments. But with the brownish acryl front removed, the yellow is mint green instead. I also remember that other VFD in tabletop games even had white segments made by external filters. Hence looking at the naked VFD glass panel without case (e.g. from a scrap PCB) can be very deceiving.