[Coco] CoCo2 vs CoCo3 changes

[Zippster]

If the composite is skewed to the left and the text and colors look terrible, that’s normal.

Just kidding…    Sort of.  :)

The GIME and any socketed chips should probably be pulled and reseated, but be careful, don’t crack the socket.

There could be issues with some of the electrolytic caps as well.

Do you have a 512k memory expansion?  A lot of CoCo3 specific software requires one.

- Ed


> On Jul 18, 2018, at 11:56 AM, rietveld rietveld <rietveldh at hotmail.com> wrote:
> 
> 'composite issues '?   ‎Does it display in a semi black and white?   I found that my coco3 and Dragon 64 both have display issues with certain tv/monitors that use comp in.   Some work perfectly others didn't
> 
> Sent from my BlackBerry 10 smartphone.
>  Original Message
> From: Kevin Becker
> Sent: Wednesday, July 18, 2018 11:10 AM
> To: CoCoList for Color Computer Enthusiasts
> Reply To: CoCoList for Color Computer Enthusiasts
> Subject: Re: [Coco] CoCo2 vs CoCo3 changes
> 
> 
> Thanks, these look great.
> 
> Apparently my new CoCo 3 isn't working so well though so it may be some
> time before I really get to dig into it.  I plugged it in last night and
> had a lot of weird composite video issues.  Maybe it just doesn't like my
> TV.  The RF output seems to work fine.  I haven't been able to successfully
> run any CoCo 3 software either though.  It seems to crash or not load at
> all.  I did run a memory test successfully so I've got some digging to do
> to figure out what is going on.
> 
> On Wed, Jul 18, 2018 at 7:22 AM, Frank Swygert <farna at amc-mag.com> wrote:
> 
>> On 17/7/2018 14:02, Kevin Becker wrote:
>>> So I finally broke down and bought a CoCo 3 on eBay.  It arrived today
>> but
>>> I haven't had a chance to try it out yet since I'm at work.  It suddenly
>>> occurred to me though that I don't actually know that much about the CoCo
>>> 3.  I had a CoCo 2 back in the 80s and I bought a CoCo 2 last winter that
>>> I've been having fun with.
>>> 
>>> I know it has more RAM, different keyboard layout, composite and RGB
>>> video.  I know the GIME provides better graphics.  Anything else I should
>>> know?  I'm especially curious about the MicroWare additions to BASIC to
>>> support the improved graphics.  Should I just RTFM or is there any sort
>> of
>>> quickstart list of things to know for someone upgrading from CoCo 2 to a
>>> CoCo 3?
>> 
>> =========================================
>> 
>> The "Unravelled" series of books for all three CoCos are in the link
>> below. You might want to start with the "Super Extended BASIC Unravelled"
>> to see how all the new commands work.
>> http://www.colorcomputerarchive.com/coco/Documents/Books/Unravelled%
>> 20Series/
>> 
>> This should help also. Was printed right after the CoCo3 came out:
>> http://www.colorcomputerarchive.com/coco/Documents/Books/Coco%20III%
>> 20Secrets%20Revealed%20(Microcom%20Software).pdf
>> 
>> 
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