I still have some of the ST chips, unused, plus the xtals for them.

Other than that, I'd suggest a copy of Don Lancaster's TV typewriter cookbook, and a Scenix or AVR processor :)  A tiny-11 has more usable bandwidth than my old 6502 based system that did video out. (OSI-C1P)
The character rom on the C1P would probably be it's only advantage.

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