I want to know any one has better logic of sending binary data to a 7-segment display then the following which covers lesser memory. suggestions should only be of programming not for hardware.

Objective:-

1) Keeps on monitoring Port 1 whether 8 bit data came or not ..

2) 8 bit Binary data recived at port 1,

3) Range of data 0 to 99.

4) need to be displayed via 74LS373 on two 7-segment common cathode digits.

5) Most important is memory ,logic should be developed in such a way that lesser space can be used..


ORG 00H

now really i don't understand how to write a command which can keep on monitoring whether data have arrived on POrt 1 or not.Like for bit i can use:- JNB P1.0,$ but how to monitor entire port. So firstly tell me how to do that ?

when ever the data comes i move it in R0

MAIN:

MOV R0,P0 ;( 8 bit binary data moved)
MOV A,R0
MOV B,#10 ; ( using divde command register)
DIV AB
CALL MSB DISPLAY

(now here something i need to know, if i divide a binary 8 bits number with 10 as done above will the data i will get will be in the MSB = A , and LSB = remainder value in B.)

MSB DISPLAY:
ZERO: CJNE A,#00H,ONE
MOV P2,#3FH
JMP LSB DISPLAY
ONE: CJNE A,#01H,TWO
MOV P2,#06FH
JMP LSB DISPLAY
TWO: CJNE A,#02H,THREE
MOV P2,#5BFH
JMP LSB DISPLAY
THREE: CJNE A,#03H,FOUR
MOV P2,#4FH
JMP LSB DISPLAY
FOUR: CJNE A,#04H,FIVE
MOV P2,#66H
JMP LSB DISPLAY
FIVE: CJNE A,#05H,SIX
MOV P2,#6DH
JMP LSB DISPLAY
SIX: CJNE A,#06H,SEVEN
MOV P2,#7DH
JMP LSB DISPLAY
SEVEN: CJNE A,#07H,EIGHT
MOV P2,#07H
JMP LSB DISPLAY
EIGHT: CJNE A,#08H,NINE
MOV P2,#8FH
JMP LSB DISPLAY
NINE: CJNE A,#09H,ED
JMP LSB DISPLAY

LSB DISPLAY:
ZERO: CJNE A,#00H,ONE
MOV P3,#3FH
JMP MAIN
ONE: CJNE A,#01H,TWO
MOV P3,#06FH
JMP MAIN
TWO: CJNE A,#02H,THREE
MOV P3,#5BFH
JMP MAIN
THREE: CJNE A,#03H,FOUR
MOV P3,#4FH
JMP MAIN
FOUR: CJNE A,#04H,FIVE
MOV P3,#66H
JMP MAIN
FIVE: CJNE A,#05H,SIX
MOV P3,#6DH
JMP MAIN
SIX: CJNE A,#06H,SEVEN
MOV P3,#7DH
JMP MAIN
SEVEN: CJNE A,#07H,EIGHT
MOV P3,#07H
JMP MAIN
EIGHT: CJNE A,#08H,NINE
MOV P3,#8FH
JMP MAIN
NINE: CJNE A,#09H,ED
ED: JMP MAIN

can the above be done using only one port but not changing any hardware or doing multiplexing..