[Coco] Layout for the Marty Goodman PAL selector

[K. Pruitt]

Sorry for the formatting issues with my previous post. I wrote it in 
notepad, so I'm not sure where all the carriage returns came from.

My apologies.

So here's a do-over - wanted or not.

----- Original Message ----- 
From: "K. Pruitt"
Sent: Monday, June 01, 2015 7:38 AM
Subject: [Coco] Layout for the Marty Goodman PAL selector


Here's the wiring layout for the Marty Goodman PAL selector board I pulled
from an MPI:

The PAL selector switch is wired as follows:

The wiring runs from the PAL socket on the MPI, to the PAL 5144, to the PAL
5244.

Pin 1 of the PAL Socket, Pin 1 of the PAL 5144 and Pin 1 of the PAL 5244 are
connected together. This same wiring scheme is performed for Pins 1-13 and
Pins 17-20

Pin 1 to 1 to 1
Pin 2 to 2 to 2
Pin 3 to 3 to 3
and so on for pins 1-13 and pins 17-20.

Pins 14-16 are wired as follows:

PAL 14L4CN 8075144:
Pin 14 --> Switch Terminal 3
Pin 15 --> Switch Terminal 6
Pin 16 --> Switch Terminal 9

PAL Socket in the MPI:
Pin 14 --> Switch Terminal 2
Pin 15 --> Switch Terminal 5
Pin 16 --> Switch Terminal 8

PAL 14L4CN 8075244:
Pin 14 --> Switch Terminal 1
Pin 15 --> Switch Terminal 4
Pin 16 --> Switch Terminal 7

The toggle switch is a C&K Components 7301 On-On 3PDT Solder Mount.

With the PAL 5144 selected, the MPI is configured for a Coco 1 and 2.
With the PAL 5244 selected, the MPI is configured for a Coco 3.

And that's it.

Pictures are online for reference if needed.