[Coco] Fixing my "F" board TDP-100...

[Joe Grubbs]

What is the functional difference between the 6821 and 6822? All I've found is that the 22 is perhaps more robust


--- Original Message ---

From: "Darren A" <mechacoco at gmail.com>
Sent: April 20, 2015 2:11 PM
To: "CoCoList for Color Computer Enthusiasts" <coco at maltedmedia.com>
Subject: Re: [Coco] Fixing my "F" board TDP-100...

On Mon, Apr 20, 2015 at 11:38 AM, Al Hartman wrote:

> There re no joysticks attached. It's just the computer alone. I can try
> swapping the keyboard later with the one from the "E" board Coco, but
> there's not much to go wrong in a keyboard. I tried swapping the two 6821
> chips because I thought maybe they were bad.
>
> The only chip I have not swapped is the VDG chip.
>


For an 'F' board, the PIA labeled U18 should be a 6822 (or SC67331P) rather
than a 6821.


- Darren

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