Looking for manuals for a Gridpad 1910

[Bob]

I have a working 1910, everything seems to be working.  Except the 
memory cards, not sure if they are bad or I don't know how to check them.

On screen keyboard is working as good or bad as expected, battery is 
dead but looks easily rebuildable.

Most of DOS seems to be missing, can it be replaced with Free Dos or 
another version?

-- 
But if any provide not for his own, and specially for those of his own house, he hath denied the faith, and is worse than an infidel
I Timothy 5:8