I have only played with a couple of 16*1 LCDs (one Hitachi and one
unkown) but both were implemented as 2*8 contiguous. As you point out
chars 8-15 are at buffer address 40-47H.

You should be able to implement and test this easily. Just get your
code working on your 16*2 display but using just the first 8 chars of
each line. Should transfer to the 16*1 without change.

I have spent quite a bit of time playing with 16*1 getting a
scrolling algorithm to work nicely (where chars appear from the RHS
and scroll over to the left). It was a pain because the first char
goes from address 47-46-45-44-43-42-41-40-07-06 etc (Hex).In the end
I implemented it by sticking characters into both line1 and line2
buffers (one on the visible part of the buffer, the other in the
off-screen part) and scrolling both buffers.  If the code is any use
let me know.

BTW in future I intend to implement my 16*1 code as both 16*1 and 2*8
(so it will work on 16*1 screens or just line 1 of 16*2 screens) and
use conditional assembly to generate the correct one for the current
in-use display.

Brian
Brian Jones
Java Technology Centre
IBM Hursley