----- Original Message ----- From: "Marko Mäkelä" <firstname.lastname@example.org> To: <email@example.com> Sent: Thursday, February 21, 2002 10:30 PM Subject: Re: 6502 to 8501: new details > What if you added a pull-up resistor to the CASSETTE WRITE line? I had > to do the same in the C2N232 device (for CASSETTE READ). This is just a > wild guess, as the Atmel AT90S2313 is a CMOS device and not an NMOS one > like the 6522 is. Have you measured the voltages on CASSETTE WRITE when > recording and on CASSETTE READ when playing back the tape? Even when > using a digital multimeter, the voltages should read something between 0 > and 5 volts, or steady 0 or 5 volts if the circuit doesn't work properly. I will try to measure voltages on the CASSETTE READ and WRITE lines. Can you explain me what is a 'pull-up' resistor and how to connect one of these? What value has it to be? ____ / ___|____ Daniele Gratteri, Italian Commodore and Amiga user / / | | |___/ E-MAIL: firstname.lastname@example.org / / | |___|___\ URL: http://utenti.tripod.it/danielegratteri \ \/ / \____| IRC: FIAT1100D - ICQ: 53943994 \/\/ Message was sent through the cbm-hackers mailing list
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