To recap the problem,

 I was trying to drop in a surplus replacement LCD display (1x16 hd44780
controller) into an existing PIC project, and it did'nt work.
The original display (a densitron lm2015) works fine, but the new display
(noname, but suposedly supertwist) only displays the first 8 characters.
They both have a hd44780 controller, but I notice that the densitron also
has an additional OKI row driver.
-------------------------------------------------------------------------

 And the answer is... that surplus 1x16 displays with just a single hd44780
are memory organized as 2x8 displays. There are various ways of dealing with
this in the code. This is no problem, it was just a question of bothering to
make the changes to the source code of the original debugged (ha!) project
or just saving the displays for a new design.

 My thanks go to David, Jacob, and Mike (who actually sent the answer to my
pager via my web page interface) for the timely response.


carl

----------------------------------------------------------------
Henry Carl Ott   N2RVQ   | talk/chat  carlott@204.74.7.186
carlott@interport.net    | http://www.interport.net/~carlott/
----------------------------------------------------------------
"A day job...in an office? My worst nightmare!"-Ticknophobia