Wild-hair floppy drive question

[Allison]

>
>Subject: Re: Wild-hair floppy drive question
>   From: "Randy McLaughlin" <cctalk at randy482.com>
>   Date: Mon, 13 Jun 2005 18:39:14 -0500
>     To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org>
>
>From: "Doc Shipley" <doc at mdrconsult.com>
>Sent: Monday, June 13, 2005 6:33 PM
>
>
>> Randy McLaughlin wrote:
><snip>
>>> To make the Teac 1.2mb drive act like a QD drive there are two options:
>>>
>>> Jumper I on, LG off, low on pin 2 of the 34 pin connector or Jumper I on, 
>>> LG on, high on pin 2 of the 34 pin connector.
>>
>>   Thanks.  I think it was the flip-flop on pin 2 that was hammering me.
>>
>>   I'm suddenly in the middle of a Tivoli TSM migration, but when things 
>> cool off  abit I'll try this.
>>
>>
>> Doc
>
>You would think they would have included a jumper to select the speed and 
>ignore pin 2.
>
>The best thing would be to cut the trace and ground it so the signal doesn't 
>go back to the controller.  As a matter of fact cutting pin 34 often helps.
>

Actually on some varients the jumper does exactly that, with a 
pair to select if the "input" are high or low another only has a
single jumper to select low with a pull up.  I have five 
different FD55GFx flavors with boards that are markedly 
differnt.  Most annoying. But they have proven to be reliable.



Allison