[Coco] again 3.5" drive

[Jim Hickle]

I didn't list drive select 3 because I don't know
for sure how the coco handles it, AND I use
double-sided drives so am limited to 3 drives anyway.
I <think> to use a fourth single-sided drive you'd
have to make a new cable with line 32 (side select)
from the controller going to pin 6 (ds3) on the drive.


--- Frank Swygert <farna at att.net> wrote:


> I thought the lines you have listed as "motor on"

> were "side select", especially on the CoCo cable. I

> know you can have only three double sided drives on

> the CoCo or four single sided drives, as the "side

> select" line is used to access drive 3 (#4 physical

> drive). Or did you not list the side select and

> drive select 3 lines? 

> 

> --------------

> Date: Thu, 24 Apr 2008 10:44:20 -0700 (PDT)

> From: Jim Hickle <jlhickle at yahoo.com>

> 

> The CoCo floppy controller and floppy drives

>  use pins 10 thru 16 for these signals (odd numbered

> lines are grounded):

> 10 - Drive Select 0

> 12 - Drive Select 1

> 14 - Drive Select 2

> 16 - Motor On

> 

> Each drive is jumpered as 0,1 or 2.

> Line 16 turns on motors of all drives.

> 

> 

> PC controllers are different:

> 10 - Drive 0 Motor On

> 12 - Drive Select 1

> 14 - Drive Select 0

> 16 - Drive 1 Motor On

> 

> ALL drives (all two of 'em) are jumpered as Drive 1.

> Cable lines 10 thru 16 are twisted for Drive 0

> (remember it is jumpered as Drive 1).  Since these

> lines have been reversed, the drive still gets 

> Drive Select on line 12 and Motor On on line 16.

> 

> -- 

> Frank Swygert

> Publisher, "American Motors Cars" 

> Magazine (AMC)

> For all AMC enthusiasts

> http://farna.home.att.net/AMC.html

> (free download available!)

> 

> 

> --

> Coco mailing list

> Coco at maltedmedia.com

> http://five.pairlist.net/mailman/listinfo/coco

> 




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