update README

master
Vanessa Ezekowitz 2015-06-20 03:59:02 -04:00
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@ -27,4 +27,23 @@ character set, along with these messages:
Any unrecognized word or symbol outside the 32-129 range is ignored.
The Decatron tubes respond to 0-9 and "off", same as the others, along with
the following actions:
* "inc" will increment the tube's current number value.
If the value overflows from 9 back to 0, the tube will generate a "carry"
message.
* "dec" will decrement the current value.
If the value wraps from 0 back to 9, the tube will send out a "borrow"
message.
* "get" will query the current state of the tube, responding with a single
digit 0-9 or the word "off".
Tubes emit a small amount of light when displaying something.
Nixies can only be mounted on the floor, while Decatrons can be mounted on a
wall (or a ceiling if so desired).
A Decatron has a small grey spot on its internal insulator to mark the "0"
position.