[Coco] MC6847 ( Motorola DS9823)

[Bill Pierce]

Since the real search is for the datasheet for the MC6847T1, I would assume the service manual needed would have to be from (?)1984 or 1985(?) as that chip was added to the last incarnation of the Coco 2, the Color Computer 2b.
Also, I was looking at the article in the Rainbow on the Coco 2b and it states that the MC6847T1 was also known as the XC80652P (pre-production name).
 And another thing I didn't know was that the SN74LOS783 (MC6883 SAM chip) was replaced with the SN74LS785 (backwards compatable) to faciliate the new VDG chip. I wonder if it had any "hidden" features that the Coco wasn't using.

Bill P

Music from the Tandy/Radio Shack Color Computer 2 & 3
https://sites.google.com/site/dabarnstudio/
Bill Pierce
ooogalapasooo at aol.com




-----Original Message-----
From: Chester A Patterson <chester6809 at gmail.com>
To: 'CoCoList for Color Computer Enthusiasts' <coco at maltedmedia.com>
Sent: Thu, Mar 21, 2013 10:11 pm
Subject: Re: [Coco] MC6847 ( Motorola DS9823)


This is probably old beaten stuff but here goes.

Looking again in the CC2 Service Manual (1983) it says the MC6847 (Motorola
DS9823) so I Googled DS9823 and found this:

http://www.colorcomputerarchive.com/coco/Documents/Microprocessors/MC6809/Mo
torola%20MC6847%20MOS%20Video%20Display%20Generator%20Datasheet.pdf



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