System Bus Radio: Transmits AM radio on computers without transmitting hardware
1–10 of 125 posts
Re: System Bus Radio: Transmits AM radio on computers without transmitting hardware
#2Can you someone do a ELI5 on this project? Tried to read but couldn't move further.
Re: System Bus Radio: Transmits AM radio on computers without transmitting hardware
#3Can you someone do a ELI5 on this project? Tried to read but couldn't move further.
Computers emit radio waves, by varying the processing upon the computer you can influence those emissions. Thus you are able to control those emissions and produce a radio signal you can pick up upon a standard radio.
Re: System Bus Radio: Transmits AM radio on computers without transmitting hardware
#4I remember this from a few years back, but apparently this was ported to JS.
Re: System Bus Radio: Transmits AM radio on computers without transmitting hardware
#5In the 1970s, I read about people doing this at MIT or some such, on real computers. Our high school had a Nova 1220 minicomputer, but we had no access to assembly for it, so all I could do was write programs in BASIC.
After a bit of experimentation, I was able to produce two or three distinct tones of discordant buzzing with loops.
Computer music!
Re: System Bus Radio: Transmits AM radio on computers without transmitting hardware
#6In the 1970s, I read about people doing this at MIT or some such, on real computers. Our high school had a Nova 1220 minicomputer, but we had no access to assembly for it, so all I could do was write programs in BASIC. After a bit of experimentation, I was able to produce two or three distinct tones of discordant buzzing with loops. Computer music!
I saw it done in the 1970s on a PDP-8 at the University of Minnesota. It wasn't just a couple of tones, it was playing complete songs. Later on a Z80 micro. Computers really emitted a lot of RF back then!
Re: System Bus Radio: Transmits AM radio on computers without transmitting hardware
#7If you're ever near Stuttgart, Germany, go and visit the university's computer museum!
http://computermuseum.informatik.uni-stuttgart.de/
Klemens usually feeds punched cards into one of his treasures and puts a radio on top. Playing music.
So much to see!
http://computermuseum.informatik.uni-stuttgart.de/cm003.html
Including real core memory.
Re: System Bus Radio: Transmits AM radio on computers without transmitting hardware
#8In the 1970s, I read about people doing this at MIT or some such, on real computers. Our high school had a Nova 1220 minicomputer, but we had no access to assembly for it, so all I could do was write programs in BASIC. After a bit of experimentation, I was able to produce two or three distinct tones of discordant buzzing with loops. Computer music!
I saw it done in the 1970s on a PDP-8 at the University of Minnesota. It wasn't just a couple of tones, it was playing complete songs. Later on a Z80 micro. Computers really emitted a lot of RF back then!
For good tones, you had to get down close to "the metal." I recall that there were a few programs like this, but I believe they were written in assembler or machine language so as to control the cpu and bus directly.
Re: System Bus Radio: Transmits AM radio on computers without transmitting hardware
#9Didn't work for me on a 2013 Mac Pro or a 2015 MacBook Pro. I have a handheld and I tried multiple antenna positions.
Re: System Bus Radio: Transmits AM radio on computers without transmitting hardware
#10In the 1970s, I read about people doing this at MIT or some such, on real computers. Our high school had a Nova 1220 minicomputer, but we had no access to assembly for it, so all I could do was write programs in BASIC. After a bit of experimentation, I was able to produce two or three distinct tones of discordant buzzing with loops. Computer music!
I think you are referring to "Foot on the Hill" being played on that Altair 8800, which cunningly made use of the radio frequency interference/ static controlled by the timing loops by the program - created by Steve Dompier .
Bill Gates was confounded and astounded, and described it as, "the best demo program I've seen for the Altair…". He could not figure out how the computer could broadcast to the radio.
You can read more about it here => https://en.wikipedia.org/wiki/Open_Letter_to_Hobbyists