add alpha-numeric support (full ASCII charset, 32-127)

via 15-segment display tube (similar to Burroughs B-7971).
This commit is contained in:
Vanessa Ezekowitz
2015-06-10 23:38:56 -04:00
parent 94cd41d4b4
commit 4d32583fef
18 changed files with 230 additions and 6 deletions

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