[Coco] Mechanical keyboard upgrades for the CoCo

[Mark J. Blair]

> On Aug 25, 2015, at 20:03, Salvador Garcia <ssalvadorgarcia at netscape.net> wrote:
> 
> 
> I am not sure if I am following this thread. If I understood, the CPLD was going to be used t compensate the differences in keyboards of the CoCos 1, 2 and 3, not to map a PC layout to a CoCo layout. Am I misunderstanding something?

I believe that the CoCos all use the same scanning matrix, with the four additional keys found on the CoCo 3 simply filling the four empty scan matrix that are present in the CoCo 1. Even the original HJL-57 keyboards for the CoCo 1 included the four extra keys. So I don't see any need to perform any different mappings for the CoCo 1/2/3. The CoCo 3 has a slightly different physical arrangement of keys, but they're electrically the same except for the four added keys.

The CPLD was suggested for mapping from PC-like arrangements, if I'm not mistaken.


-- 
Mark J. Blair, NF6X <nf6x at nf6x.net>
http://www.nf6x.net/