Z80 Programming Help - Smart Home Alarm

Hello! I need some help with this program...it doesn't quite run by the way I want it to

Question:
Develop a program that will simulate a home alarm system, using the DIL switches on the application board to simulate the sensors and the speaker to signal the alarm. The system will detect two conditions (SW =1, means door not closed or window is open)
a. SW0 - detect the door
b. SW1 - detect the window
when switch detected/ or sensor triggered, a high frequency sound will activate as warning. At the same time, LED D4 will be turned on if the door is opened or/and LED D5 will be turned on if the window is opened.

My program:
ORG 1800H
LD A,4FH
OUT (82H),A
LD A,0FH
OUT (83H),A
START LD B,01H
IN A,(80H)
CP B
JP Z,DOOR

DOOR LD A,10H
OUT (8IH),A
CALL TONE
JP START

TONE EQU 05E4H


It's not quite finished yet,I'm trying to make it work with one switch first. Do give me your thoughts and opinions! If you cannot help, giving me any good sites for reference would be very helpful too. :happy: