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interfacing lcd with 8255 using 8086
Post: #1

please explain this code:


PROC LCD_INIT
;input: none
;output: none

;make RS=En=RW=0
MOV AL,0
CALL OUT_B
;delay 20ms
MOV CX,1000
CALL DELAY
;reset sequence
MOV AH,30H
CALL LCD_CMD
MOV CX,250
CALL DELAY

MOV AH,30H
CALL LCD_CMD
MOV CX,50
CALL DELAY

MOV AH,30H
CALL LCD_CMD
MOV CX,500
CALL DELAY

;function set
MOV AH,38H
CALL LCD_CMD

MOV AH,0CH
CALL LCD_CMD

MOV AH,01H
CALL LCD_CMD

MOV AH,06H
CALL LCD_CMD

RET
ENDP LCD_INIT
Post: #2
It can be understood in the following video:


 


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