Path: utzoo!mnetor!uunet!husc6!bbn!gatech!hubcap!mrspock
From: mrspock@hubcap.UUCP (Steve Benz)
Newsgroups: comp.arch
Subject: Re: Computer noises (was Re: Cray architecture)
Message-ID: <1297@hubcap.UUCP>
Date: 4 Apr 88 17:39:16 GMT
References: <1503@vaxb.calgary.UUCP>
Organization: Clemson University, Clemson, SC
Lines: 20


 In article <1503@vaxb.calgary.UUCP> radford@calgary.UUCP (Radford Neal) writes:
>I have a vague recollection back from when I was a first-year student
>(1974) of someone demonstrating a program for the PDP-8 that played a quite
>good rendition of some piece of music on a radio placed beside the 
>CPU. In retrospect, this seems moderately unlikely, though not impossible.

 Actually, you don't even need anything as high-tech as a PDP-8 to
do this stunt.  As I remember, there was an article for the
Timex-Sinclair 1000, or potentially one of the earlier names for it, which
could play actual notes on AM radio by putting the two wires of the
antenna underneath the machine.  You could produce different notes
by putting the machine into infinite loops at various points in memory,
i.e:
	ORG	X
Y	BRA	Y

 The frequency of the note was proportional to X.

				Steve