Here are some references from a Finnish magazine (Prosessori), in Finnish of course :-) Mikrotietokone radioamatöörin apuvälineenä osa 1, Prosessori 11/1982 (describes how to send morse code with VIC-20. It uses a simple circuit with one resistor and one transistor to key the transmitter. It is connected to the control port) Mikrotietokone radioamatöörin apuvälineenä osa 2, Prosessori 4/1983 (describes how to receive morse code with VIC-20. It uses a circuit with a dual op-amp LM358, 567 as a PLL, 7414 inverter/schmitt trigger and 555 as an audio oscillator. The circuit connects to VIC-20 control port. The circuit is based on a design that was published in Finnish magazine Elektroniikkauutiset 19/1979. The program is mixed BASIC and machine code) No, I haven't tried these programs and circuits myself. Back then morse code was mandatory and that was a burden for me. 73 de OH1FSS P.S. SP1WSC de OH1FSS TNX QSO CU 20m PSK31 OR 4m ES 73 DSW GN SP1WSC de OH1FSS Marko Mäkelä [firstname.lastname@example.org] kirjoitti: > To bring this a bit more on-topic, were there any Commodore programs for > capturing Morse code from a radio receiver? If yes, how was the signal > detection done? I guess with some op-amp circuit similar to what exists > in the tape drive? And how would the data be recorded? Anything similar > to the *.tap format, which represents the time between output > transitions? Message was sent through the cbm-hackers mailing listReceived on 2014-02-14 21:00:07
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