[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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