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ORG $0100
PORTB: EQU $1004
PORTC: EQU $1003
DDRC: EQU $1007
******************************************
ldaa #$EB
staa DDRC

readSW: ldaa PORTC



start1: ldaa PORTC ;load from portc
anda #$14 ;mask the switch
cmpa #$10 ;check switch 1
bne start2 ;not activated
starta ldx #digitsa ;activated load the data
loop1 ldaa $00,x
beq start1
staa PORTB ;o/p tp portb
ldy #$FFFF ;delay

delay1 dey
bne delay1 ;delay
inx
bra loop1 ;else countinue







start2: ldaa PORTC ;load from portc
anda #$14 ;mask the switch
cmpa #$04 ;check switch 2
bne start3 ;not activated
startb ldx #digitsb ;activated load the data
loop2 ldaa $00,x
beq start1
staa PORTB ;o/p tp portb
ldy #$FFFF ;delay

delay2 dey
bne delay2 ;delay
inx
bra loop2 ;else countinue



start3: ldaa PORTC ;load from portc
anda #$14 ;mask the switch
cmpa #$14 ;check switch 3
bne checkAgain ;not activated
startc ldx #digitsc ;activated load the data
loop3 ldaa $00,x
beq start1
staa PORTB ;o/p tp portb
ldy #$FFFF ;delay

delay3 dey
bne delay3 ;delay
inx
bra loop3 ;else countinue


checkAgain:
jmp readSW ;repeat



end

digitsa
fcb $40

fcb $42

fcb $44

fcb $46

fcb $48

fcb $00


digitsb


fcb $B1

fcb $B3

fcb $B5

fcb $B7

fcb $B9

fcb $00


digitsc
fcb $40
fcb $B1
fcb $41
fcb $B0
fcb $00









END