Nytro Posted 3 hours ago Report Posted 3 hours ago PhaseLoom: A Software Defined Radio Powered by the Chip used in the Commodore 64, NES and other Early Home Computers The MOS Technology 6502 is, by today's standards, an ancient chip, having just turned 50 this September 8. It was the chip behind the early age of home computing, powering iconic systems like the Apple I & II, Commodore 64, Atari, and Nintendo Entertainment System. It is, therefore, fascinating that someone has managed to use this chip as a core component in a modern software-defined radio system. Over on his blog, Anders B Nielson describes PhaseLoom, a 6502-based "Quadrature Sampling Detector Phase-Locked Loop SDR frontend". Realistically, we want to point out that the 6502 isn't actually doing any digital signal processing (DSP). The 6502 is used as an assembly programmed controller for a SI5351-based local oscillator and multiplexor chip that generates IQ data. Piping the IQ data into a PC with a soundcard is still required to actually get data out. However, Anders notes that he eventually hopes to get some DSP running on the 6502. With the setup he is currently able to tune just to he 40m band, noting that performance isn't great, but at least it works! Anders' video below explains the entire design and concept in detail, and we note that he is currently selling a full kit on his store. Sursa: https://www.rtl-sdr.com/phaseloom-a-software-defined-radio-powered-by-the-chip-used-in-the-commodore-64-nes-and-other-early-home-computers/ Quote
