[Coco] 2 x 3.5 Drives on CoCo

[Bob Devries]

Many PC 3.5" drives do not have a connection to the unused (on a PC) Drive 
Select pins. Only DS1 is wired. Some have a jumper block to do the drive 
select, while others have a switch.

--
Besides a mathematical inclination, an exceptionally good mastery of one's 
native tongue is the most vital asset of a competent programmer.

Edsger W.Dijkstra, 18 June 1975

----- Original Message ----- 
From: "Jason Law" <jmlaw at iprimus.com.au>
To: "'CoCoList for Color Computer Enthusiasts'" <coco at maltedmedia.com>
Sent: Saturday, March 13, 2010 5:46 PM
Subject: Re: [Coco] 2 x 3.5 Drives on CoCo


> The only drive I have with DS select won't seek for some reason.
>
> I have 2 other drives I can pull out to check to see if they have DS, I'll
> try my luck there first.
>
> Thanks for your help :)
>
> -----Original Message-----
> From: coco-bounces at maltedmedia.com
> [mailto:coco-bounces at maltedmedia.com]On Behalf Of Bob Devries
> Sent: Saturday, March 13, 2010 4:23 PM
> To: CoCoList for Color Computer Enthusiasts
> Subject: Re: [Coco] 2 x 3.5 Drives on CoCo
>
>
> Unless the drives are hard wired for DS=1, then the Coco should not have a
> twist in the drive cable. Just set one drive to DS=0 and the other to 
> DS=1.
> The PC disk drive controller has modified pinouts that are not to the same
> standard as the Coco controller.
>
> --
> Besides a mathematical inclination, an exceptionally good mastery of one's
> native tongue is the most vital asset of a competent programmer.
>
> Edsger W.Dijkstra, 18 June 1975
>
> ----- Original Message -----
> From: "Jason Law" <jmlaw at iprimus.com.au>
> To: <coco at maltedmedia.com>
> Sent: Saturday, March 13, 2010 4:33 PM
> Subject: [Coco] 2 x 3.5 Drives on CoCo
>
>
>> Hi Guys,
>>
>> Does anyone have info on the cable twist that needs to be done to allow 2
>> x
>> 3.5 drives to work from a disk controller?
>>
>> I have one drive working as drive 1 & 3, but I have read a cable twist is
>> required for drive 0 & 2
>>
>> Thanks in advance :)
>>
>> --
>> Coco mailing list
>> Coco at maltedmedia.com
>> http://five.pairlist.net/mailman/listinfo/coco
>
>
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