[Coco] RE: [Color Computer] 6847T1 datasheet

[jdaggett at gate.net]

All

The MC6847 has an internal character generator ROM. Motorola 
has a common practise to add a letter number designator to the end 
of the standard part for different mask sets or different character 
sets. This will differentiate the off the shelf part from the custom 
part as ordered by a particular customer.

The T1 ending is just that. It was ordered with a different character 
rom mask by either Tandy or another vendor and that marking 
differentiates what Motorola offers for the standard MC6847 part.

james

On 7 Jun 2004 at 9:57, Mike Pepe wrote:

To:             	<ColorComputer at yahoogroups.com>
From:           	"Mike Pepe" <lamune at doki-doki.net>
Date sent:      	Mon, 7 Jun 2004 09:57:00 -0400
Copies to:      	John0457 at hotmail.com
Subject:        	[Coco] RE: [Color Computer] 6847T1 
datasheet
Send reply to:  	ColorComputer at yahoogroups.com,
	CoCoList for Color Computer Enthusiasts 
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> John, the 6847T1 is an enhanced 6847 with built in lower case and some
> other features. It came out well after 1981. Probably 1984 or so.
> 
>   _____  
> 
> From: John Kent [mailto:          ] 
> Sent: Monday, June 07, 2004 7:32 AM
> To: ColorComputer at yahoogroups.com
> Subject: RE: [Color Computer] 6847T1 datasheet
> 
> Hi Mike,
> I have a Motorola data manual circa 1981 that has the 6847 in it ... I
> don't know what the T1 signifies though. I'll have to feed it through
> the scanner if you can't find the data sheet electronic form. John.
> ----Original Message Follows---- From: "Mike Pepe"
> <lamune at doki-doki.net> Reply-To: ColorComputer at yahoogroups.com To:
> <ColorComputer at yahoogroups.com> Subject: [Color Computer] 6847T1
> datasheet Date: Sun, 6 Jun 2004 20:51:43 -0400 Would anyone in the
> group happen to have the MC6847T1 datasheet, or perhaps the schematic
> in the service manual from a late CoCo 2 that had the 6847T1? Thanks! 
> 
> 
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