[Coco] CoCo keyboard connector

[Stephen H. Fischer]

Hi,

The KeyBoard Interface with the Matrix is in:

The service manual for the CoCo 2

The service manual for the CoCo 3

SHF

----- Original Message ----- 
From: "Steve Batson" <steve at batsonphotography.com>
To: "CoCoList for Color Computer Enthusiasts" <coco at maltedmedia.com>
Sent: Friday, March 02, 2012 5:57 PM
Subject: Re: [Coco] CoCo keyboard connector


>I do know it's a matrix with all the switches connected to it as already 
> mentioned. > 
> ----------------------------------------
> From: "Bruce W. Calkins" <brucewcalkins at charter.net>
> Sent: Friday, March 02, 2012 4:26 PM
> To: "CoCoList for Color Computer Enthusiasts" <coco at maltedmedia.com>
> Subject: Re: [Coco] CoCo keyboard connector 
> 
> ----- Original Message ----- 
> 
> From: "Allen Huffman"
> 
>> Hey, is there a tech manual online somewhere? I'm interested in how the 
>> CoCo keyboard connector works. I know it went to a thin mylar connector 
>> for the CoCo 3, but wasn't it a ribbon cable for the CoCo 1?
>>
>> Are the CoCo keys just switches, that open/close contacts and it's read 
> as 
>> an X by Y matrix of switches?
>> -
>> Allen Huffman -
> 
> The thin Mylar connector came out with the "283" "F" board CoCo 1 and 
> continued through the 2 and 3.  The keyboard was a 7 by 8 matrix of SPST 
> momentary contact switches.  I rebuilt two "real" keyboards for my "E" 
> board 
> CoCo 1.  I actually wore out the first.
> 
> Bruce W.