Addressrange:
=============

ROM	0000h - FFFFh

A15=0:
RAM	0000h - 7FFFh

A15=1:
I/O	8000h - FFFFh
---------------------
Y0	8000h - 8FFFh
Y1	9000h - 9FFFh
Y2	A000h - AFFFh
Y3	B000h - BFFFh
Y4	C000h - CFFFh
Y5	D000h - DFFFh
Y6	E000h - EFFFh
Y7	F000h - FFFFh

LCD (Y0)
--------
LCD_RegWR 	equ  8xx0h     	;write lcd-register A1=0 ,A0=0
LCD_RegRD 	equ  8xx1h     	;read  lcd-register A1=0 ,A0=1
LCD_DataWR 	equ  8xx2h     	;write lcd-data	    A1=1 ,A0=0
LCD_DataRD 	equ  8xx3h     	;read  lcd-data	    A1=1 ,A0=1