[Coco] coco 1 problem char

[John E. Malmberg]

Pierre Fortin wrote:
> Bonjour tout le monde,
<snip>

> Hello everyone,
> 
> Since I am French-speaking and that I do not speak English and that I use a
> translator, then I tightened in short.

Even though there is a bit of French and French Canadian blood in me, it 
has not allowed me to master the French language.

> Since more than one years that I impassion myself for Trs-80. I have 8 coco,
> 1 Mc-10 and 2 Trs-80 Model III, of the diskettes, cartridges etc...
> 
> I have a problem with my coco1, I must start it several times so that it
> posts "Microsoft BASIC....", if not it remains with a green screen. When it
> ended up starting after several tests, I type:
> 
> PRINT "HELLO" + enter
> IDMLO
> 
> Why it does not post "HELLO"? After several times of restarting it happens
> that he posts "HELLO".

It looks like you have some defective hardware, that is intermittently 
working.

If you feel competent to open it up, I would try reseating all of the 
components to see if that would make it more stable.

Other than that, I would recommend replacing the RAM with known good 
ones and see if that helps.  A ROM could also be going bad, but that is 
less likely.

I would also do an inspection of the insides to see if anything is 
shorting things out.

It could also be a bad keyboard, but that would be lower on my list than 
bad RAM.

> Thank you for your assistance and I hope that my French of does not disturb
> the members.

There are probably some here who could read the French quite well, but 
as long as you provide an English section, it should not be a problem.

-John
wb8tyw at qsl.net
Personal Opinion Only