[Coco] Weird CoCo 2 keyboard problem -- any ideas?

[Robert Gault]

John W. Linville wrote:
> On Fri, Mar 29, 2013 at 06:31:21PM -0400, Arthur Flexser wrote:
>> P.S.  I assume that you've verified that the problem occurs no matter which
>> of the two shift keys you press?
>
> Yes, both shift keys produce the same result.
>
>> Have you checked whether the problem occurs with software that doesn't use
>> Basic's keyboard scan routine?   OS-9 for example?
>
> I do my own keyboard scan in Sluzzle.  I haven't tried OS-9, but it
> is hard to see what it might do differently?
>
> John
>

John,
Please clarify one point. Is it only in your own program that the ? key does not 
show, or does it not show in Basic as well?

My first thought is if you wrote an ml program, you are not correctly reading 
the shift keys.

Robert