[Coco] Coco-3 power and MPI questions

[Kandur]

Makes sense, I always plugged the FDC cartridge into the MPU's 
closest slot to the Coco. In my new Y-cable it is the same way:
http://qdv.pw/coco/?p=340    see the last photo.

Kandur

Wednesday, October 1, 2014, 2:13:45 PM, you wrote:

> From what I understand, the reason to use slot #1 for the disk controller was
> "distance" and "timing". IIRC, the disk controller would "sometimes not work
> properly in any other slot due to critical timing required and the time it
> took the data to travel from point A to point B. Slot #1 is the first bus on
> the MPI therefore giving the controller the fastest bus speeds. It's the same
> reason that they suggest not to make y-cables over a certain length. Also it
> seems I remember seeing somewhere to put the disk controller first even on a y-cable (same reasons).
> It seems like I read this in a Marty Goodman article in Rainbow somewhere...
> or as an answer to a question in his question/answer column.
> I may be wrong, but that's the reason that seemes to come to mind when I saw the post.
>  

> Bill Pierce
> "Today is a good day... I woke up" - Ritchie Havens
>  

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>  
>  
> -----Original Message-----
> From: tim lindner <tlindner at macmess.org>
> To: CoCoList for Color Computer Enthusiasts <coco at maltedmedia.com>
> Sent: Wed, Oct 1, 2014 12:03 pm
> Subject: Re: [Coco] Coco-3 power and MPI questions


> On Wed, Oct 1, 2014 at 8:55 AM, Kandur <k at qdv.pw> wrote:
>> Thanks Tim, is slot #1 'always on'?

> Well, that is kind of ambiguous question. All 4 ports are always on.
> If a device does full address decoding (not using SCS or CTS) it will
> respond.

> Plugging the floppy controller in the the back most slot (is it really
> labeled #1?) is more of a convention than a requirement.

> I can get you a schematic when I get home from work.

> -- 
> tim lindner

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