Re: Commodore 65 and DIN8 cable

From: Rob Clarke <crock_at_clarke-family.org.uk>
Date: Fri, 05 Feb 2016 22:38:44 +0100
Message-ID: <900EDDEE-EDA3-4919-9FEA-A35374A81923@clarke-family.org.uk>
I think appletalk cables were 8-pin mini-din cables. Not sure they ever did them that short though.

On 5 February 2016 21:21:02 CET, "Michał Pleban" <lists@michau.name> 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.
>
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Received on 2016-02-05 22:01:00

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