Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!ncar!umigw!umbio!ibiza!aem From: aem@ibiza.Miami.Edu (a.e.mossberg) Newsgroups: comp.misc Subject: Re: Looking for Computer Folklore Message-ID: <1414@umbio.MIAMI.EDU> Date: 20 Feb 89 09:16:40 GMT References: <1000@taux01.UUCP> <7449@csli.STANFORD.EDU> <345@helios.prosys.se> <411@ontenv.UUCP> <902@infmx.UUCP> Sender: netnews@umbio.MIAMI.EDU Reply-To: aem@Mthvax.Miami.Edu (a.e.mossberg) Organization: University of Miami Hertz Lab, Coral Gables, FL Lines: 25 In <902@infmx.UUCP>, wrote: >In my undergrad days, someone who probably wanted to compute and listen >to the radio found that PDP-8's had an tonal way of interfering with >radios. You put the radio in front of the panel (which did have >blinking lights, yes), and RF from the PDP-8 would make all sorts of >booping noises. >Well one enterprising programmer figured out how to manipulate the >interrupts so the 8's RF produced musical scale notes through the radio.... >You guessed it, there was a program which let you use the keyboard >to play songs. 3 octaves, one for each row on the kbd, plus sharps >and flats on the keys left over. Take that, FCC! There used to be alot of programs for the TRS-80 that used this same method. Some later ones you would use by a small board with a transistor that oscillated. That's how I added a bell to my OSI C1P - with a transistor attached at some point on the keyboard matrix and feeding a small speaker. aem a.e.mossberg aem@mthvax.miami.edu MIAVAX::AEM (Span) aem@umiami.BITNET (soon) The man who dies rich dies disgraced. - Andrew Carnegie