On a PDP-7 from 1964. Turn sound on.
Exhibit A:
The Type 340 XY display has a P7 phosphor has a slow decay which gives Munching Squares an eerie afterglow. Both programs read the left switches to modify patterns. A small AM radio was used to pick up RFI from the Type 347 controller. For the MIT AI lab hackers the Munching Squares "music" was referred to as Munching Tunes.
Exhibit B:
DATAI 2
ADDB 1,2
ROTC 2,-22
XOR 1,2
JRST .-4HAKMEM (MIT AI Memo 239, 1972) Item 146 reports that it was written for the PDP-1 by Jackson Wright in 1962.
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