Eh. Of course I meant all the lengths to be in cm, not mm. So the good length is 30 cm. Michał Pleban wrote: > 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 list > Message was sent through the cbm-hackers mailing listReceived on 2016-02-05 21:01:15
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