Hello! A quick update: Today I tried various resistor values between GND and RDATA to no avail. So I decided the best solution for me would be a shorter cable. I got a pair of scissors and began to cut the cable into and shorter parts, while one of its end was still plugged into the C65. I wrote a simple BASIC program which tries to download the disk directory 100 times and gives the percentage of successful operations. Here is the success rate as a function of cable length: 100 mm - 15% 60 mm - 70% 50 mm - 90% 40 mm - 95% 30 mm - 100% Not bad - with a 30 mm cable I can read the directory reliably. SO to test things further, I created a 64 kB SQL file, then used the DOS COPY command to duplicate it, and finally used TYPE to display it on the screen. All the operations were performed without errors. So I conclude that a 30 mm cable does not cause any problems with disk operations. Perhaps it would be best to make it 25 mm just in case - the signals will also need to go a bit over the PCB and the flat ribbon cable before they reach the drive. The big question is now: where can I get a 25 mm mini-DIN8 cable? :-) Regards, Michau. Message was sent through the cbm-hackers mailing listReceived on 2016-02-05 21:00:10
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