[Coco] again 3.5" drive

[Bob Devries]

Drive Select 3, AKA Side select is on pin 32 of the cable.

Here's the full pinout as used by the coco controllers:
2 NC
4 NC
6 NC
8 /INDEX
10 /DS0
12 /DS1
14 /DS2
16 /MOTOR
18 DIRECTION
20 STEP
22 WRITE DATA
24 WRITE GATE
26 /TRACK 00
28 /WRITE PROTECT
30 READ DATA
32 /DRIVE 3 - SIDE SELECT
34 NC (Normally /READY)
Odd numbered pins are all grounded.

--
Regards, Bob Devries, Dalby, Queensland, Australia

Isaiah 50:4 The sovereign Lord has given me
the capacity to be his spokesman,
so that I know how to help the weary.

website: http://www.home.gil.com.au/~bdevasl
my blog: http://bdevries.invigorated.org/

----- Original Message ----- 
From: "Frank Swygert" <farna at att.net>
To: <coco at maltedmedia.com>
Sent: Saturday, April 26, 2008 2:28 AM
Subject: Re: [Coco] again 3.5" drive


>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!)
>
>
> --
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