Hi,
NEC's version of 82C55 is µPD71055.
Parallel input/output controller µPD71055.

1. Try to search for a 71055 if you will find it usefull.

2. I have a PDF copy of the µPD71055. Let me
know and I can send you it through e-mail
when you will need it.

Vaclav

BTW: My tenet is that the 82C55 is obsolete for new designs.