Top Secret
8-469

Geoffrey Chase, Portsmouth Abbey School, Portsmouth,
Rhode Island

This routine accepts characters from the keyboard of an ASR33
and responds by typing a ciphered version of the input text.
It has three uses: (a) pure amusement, (b) as a demonstration
of the fact that an on-line teletype is not a typewriter; it will
print what the computer tells it to print, which may or may
not be what the user types. (c) as a simple example of input-
output programming and of program branching, for students of
machine language.

Minimum Hardware:
4K PDP-8, ASR33
Source Language:
PAL III

Catalog: July 1973