Hi Hans,

Yes, it is correct that 3000H -FFFFH is access address of falsh rather than EEPROM. I got confuse myself when I change that piece of code from 2000H to 300H and got it works. The original code was not developed by me, but someone already left. And the comment was his.

;---------------------------------------------
; EEPROM DATA
;---------------------------------------------
; ORDER TABLE
; To read rom we must locate
; it after 127 (7F hex)
; ram addresses

cseg at 2000H ;WHAT DOES THAT MEAN???

; Location of charactor data.
;---------------------------------------------
; Position data or order
; Enter the order that the floors shall be in.
;To define a message DB Mess?," " include a space so each input is made up of 2 bytes.

ORDER: DB " "
DB "B " ;Flr1 =LG b
DB "G " ;Flr2 =G g
...

MX: DB Mess1 ;Message 1 "Out Of Service"
cseg at 2082h
DB 06h ;2082h Scroll speed
DB 20h ;2083h
...