There is software to run TTY on the Model 100.
On 28 July 2018 at 11:53, John R. Hogerhuis <[email protected]> wrote: > > > On Sat, Jul 28, 2018 at 10:14 AM, Douglas Quagliana <[email protected]> > wrote: >> >> I'd like to know if there's a way to get the cassette port to recognize >> AX.25 Bell 202 packet radio tones (1200 Hertz and 2200 Hertz at 1200 baud). >> I think the cassette port audio input pin get routed to the CPU but it only >> knows "HI" and "LO" so I don't think it can detect sinewave waveforms, but I >> would really like to be proven wrong on this. If it worked, it would let you >> run packet radio right off the cassette port and use the cassette motor as >> a push-to-talk. >> > > The cassette protocol is based on measuring time between zero crossings. My > understanding agrees with yours that unlike, say, the Coco, the cassette > hardware cannot be used for general A/D conversion. > > -- John.
