Using Nokia LCD

[Gusse]

This is causing your EEADRH problem.

Readcode Addr, Char

Easiest way to go forward is comment or remove following parts of the code:

@ printstr macro function from Darrel and edited to work for this lcd
'format should look like this: @ PrintStr x,y, "your text string goes here"

Meaning StringOut and ASM-part above it.
This is disabling string printing function, so you should figure out other ways to put stuff on LCD.

Those who know better why READCODE doesn't work with 628A could answer to you.
Even better if some workaround is available.

BR,
-Gusse-