[Coco] CoCo 1 troubles

[tfadden]

Actually the terminator should be on the drive at the end of the cable 
regardless of what drive number it is set to.


--
Tim Fadden
"Hey Schmidt, don't forget about the six P's.
Proper Preparation Prevents Piss-Poor Performance!"

------ Original Message ------
From: "Arthur Flexser" <flexser at fiu.edu>
To: "CoCoList for Color Computer Enthusiasts" <coco at maltedmedia.com>
Sent: 12/23/2020 9:53:35 AM
Subject: Re: [Coco] CoCo 1 troubles

>There could be a problem with drive termination--a terminating resistor is
>supposed to be on the highest-numbered drive only.  Depending on the make
>of drive, this may be controlled by a jumper inside the drive.
>If you have only the one disk drive, you would want to turn on the DS0
>jumper and have DS1, DS2 and DS3 off.
>
>Art
>
>On Wed, Dec 23, 2020 at 11:48 AM Salvador Garcia via Coco <
>coco at maltedmedia.com> wrote:
>
>>   Ah, OK, thanks for the correction. For a minute there I thought I had
>>  taken a step forward :-). Salvador
>>
>>
>>
>>      El martes, 22 de diciembre de 2020 11:36:20 p. m. CST, Arthur Flexser <
>>flexser at fiu.edu> escribió:
>>
>>   All drive motors turn on when any drive is selected, so that doesn't
>>  indicate drive selection is working properly.  The lack of the drive's
>>  light coming on suggests drive select is NOT working.
>>
>>  Art
>>
>>  On Tue, Dec 22, 2020 at 9:32 PM Salvador Garcia via Coco <
>>coco at maltedmedia.com> wrote:
>>
>>  >  Update:
>>  >
>>  > I had the cable on backwards (ugh). I thought pin 1 on the floppy drive
>>  > was towards the top. The notch is towards the bottom and it turns out
>>  that
>>  > pin 1 is close to the notch.
>>  >
>>  > I reversed the cable and tried again. The strange RF interference is
>>  gone,
>>  > the screen remains steady as the drive is accessed. The drive select is
>>  > working because I can see the motor spin; however, the LED does not light
>>  > up.
>>  >
>>  > Hopefully, I did not damage the unit when I reversed the cable.
>>  >
>>  > Salvador
>>  >
>>  >
>>  > --
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>>  >
>>
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>>
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>
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