cvs commit: src/sys/kern subr_param.c
phk at phk.freebsd.dk
Mon Nov 8 19:25:20 GMT 2004
In message <20041108191905.4D47B5D04 at ptavv.es.net>, "Kevin Oberman" writes:
>> > Can we play music by modulating the value of hz? :)
>> I remember some code for the Commodore Pets that you could use to play
>> notes on a nearby radio by tweaking some spinning loops. Quite a neat
>> trick at the time since there wasn't any sound hardware.
>Actually, this technique predates the PET by any years. I know that we
>could play music on the PDP-1 and that goes back to the late '05s or
>early 60's. I did it on my PDP-11 in the early '70s. I also heard a CDC
>MASStore tape system played as an organ by adjusting the tape movement
>in the vacuum columns.
The first danish computer (DASK) built in 1956... had a loudspeaker
connected to a bit in one of the registers and music were played
as a demo.
The successor (GIER) has a simulator which also simulates the similarly
attached loudspeaker: http://www.datamuseum.dk/site_dk/rc/giersimulator/
I have so many computers with PCI slots running without a lid in
my basement that the commercial "FM100" station can't be received
in a 20m radius around my house...
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.
More information about the cvs-src