I found out the Coco3 needs no upgrade at all. It has Super Color Extended BASIC ROM and Disk Controller Disk BASIC ROM.

Here is a link where you can get software for your TRS-80 Color Computer 1, 2 and 3.

http://www.colorcomputerarchive.com/

Here is some links for hardware.

http://www.cocowares.com/index.php

http://www.cloud9tech.com/

http://members.iinet.net.au/~ianmav/trs80/cocos.htm

I just got a HP L1506 LCD Monitor today for a Coco 3 Computer. I am going to get a Coco SDC and looking to get the 512 memory upgrade too.

Here is some books I found for the Coco 3 for free but no Coco 3 yet.

Introducing Your Color Computer 3 (Tandy) Color Computer 3 BASIC Quick Reference Manual (Tandy) Color Computer 3 Exended Basic ( […]
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Introducing Your Color Computer 3 (Tandy)
Color Computer 3 BASIC Quick Reference Manual (Tandy)
Color Computer 3 Exended Basic (Tandy)
Color Computer Disk System (Tandy)
Color Computer Disk System Quick Reference Guide (Tandy)
Color Computer Disk System Programming Manual (Tandy)
Multi-Pak Interface for Color Computer 2 (Tandy)
Speech-Sound Cartridge Manual (Tandy)

I am going to buy a 512 memory upgrade and Coco SDC when I can.

Looking for a good working CoCo 3 Computer if anyone has one for sale send me a PM on detail of it. I am trying to bring back old times.

I found out this week I broke my back so I'm not going be here very much tell it get better. So you all have fun with what you can do. I will be back when I can.

So I will see you later and maybe I will have a Coco3 to use.

Well I have a Coco3 with 512k with all manuals and I even have a Modem Pak now. I want to be able to use my PC LCD Monitor when I get the cable. I want to get Drivewire or CocoSDC. I think it will be CocoSDC that way I won't another Computer to use my Coco3.

Since I now have a Coco2 and Coco3 I might try to link them together threw the RS-232 port.