[Coco] Multi Pack Replacement

[David Gettle]

I was under the impression that this was to reduce table top space taken by
the MPI, so the redesign would sit under the CoCo, and provide for possible
expansion of the capabilities of the MPI. Correct me if I'm wrong.

What I intended (and possibly didn't explain correctly) was to have two
dedicated slots in the back of the new unit for HD and FD controllers
(weather current or a future combined card) on a daughter board with an
RS232, and the four slots that now exist in the RS MPI facing the front of
the unit and for the CoCo to sit on top of, and plug into the MPI with all
the cartridges parallel to the CoCo main board.

On Mon, Feb 23, 2015 at 2:46 PM, Nick Marentes <nickma2 at optusnet.com.au>
wrote:

> On 24/02/2015 12:55 AM, RETRO Innovations wrote:
>
>>
>> :-), I deserved that.
>>
>
> I was gunned down last time I suggested an expansion connector on the SDC
> cart.   :)
>
>
>> I was originally thinking a pin header, to which a second PCB could be
>> attached, such that the two PCBs were parallel, and the second one sat
>> under the MPI PCB, making for a clean low profile design. The second PCB
>> could be as long as the MPI (well, almost), giving plenty of space for
>> connectors and such.
>>
>>
> I like the idea of a base board and the option for an expansion board to
> "future proof" the project.
>
> When you look at the Tandy MPI, the main board sits up high and level with
> the CoCo mainboard (cartridge connectors are on top of this). That means
> there is close to 2 inches from the main board to the desk below. Plenty of
> room to fit a daughter board underneath and prevent the MPI from becoming
> any higher than what it is.
>
> The cartridges could also be made to mount horizontally via a small
> vertically mounted bus board from the mainboard with the 4 MPI cartridge
> connectors.
>
> This makes for a  low profile MPI  (with full length carts installed) and
> the option of expansion.
>
> Nick
>
>
>
>
>
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