[Coco] Coco Digest, Vol 148, Issue 16

[John Strong]

Might want to add a couple mounting holes on the part the goes in the coco, for a possible case.

John Strong
 

> Message: 1
> Date: Wed, 04 Mar 2015 01:20:28 -0600
> From: RETRO Innovations <go4retro at go4retro.com>
> To: CoCoList for Color Computer Enthusiasts <coco at maltedmedia.com>
> Subject: Re: [Coco] 4 Port MPI PCB artwork (so far)
> Message-ID: <54F6B23C.9000009 at go4retro.com>
> Content-Type: text/plain; charset=utf-8; format=flowed
> 
> On 3/3/2015 3:50 AM, Gene Heskett wrote:
> > Thats looking closer Jim. Change the leds to horizontal mounts so they
> > shine straight down, & out from under the cart,
> I just moved them over.
> > add the gnd, 5v, +12
> > and -12 connections for psu and it should be about ready to test.
> Added
> > How
> > about a 4 wide dip switch to set the powerup default slot?
> I put the proper slide switch
> Here is the update: http://s6.postimg.org/g0u1mwfep/PCB1_2.png
> 
> * 3V3 regulator added
> * slide switch added
> * standoff holes added
> * 5 pin DIN added, to use this PSU
> (http://www.jameco.com/1/1/27755-p25a13d-r1b-3-wire-ac-input-regulated-ac-dc-switching-triple-output-table-top-power-supply.html
> , though any source for P25A13D-R1B will work)
> * Mini USB added
> * All lines routed
> * All power caps added
> 
> Now, it's time to consider the size of the PCB. There is some fat that 
> could potentially be trimmed on the side, and a bit on the other side. 
> Something to consider.
> 
> I came up with a potential idea for a cheap 8 slot unit, using the last 
> remaining IO pin on the CPLD and the fact that I will probably use IDE 
> cables for the cabling. It might be possible to "daisy chain" 2 4 port 
> MPI main units, and just set a jumper on one to be the "second 4", or 
> "slave" if you like IDE parlance. Something I am kicking around, as it 
> would not require building a new PCB, just repurposing the existing one.
> 
>