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4923.txt
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4923.txt
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.MODEL SMALL
.STACK 64
;-----------------
.DATA
DATA2 DB 5,?,5 DUP (?)
DATA3 DB 'Please enter your Identification Number: ','$'
DATA1 DB '0123456789ABCDEFabcdef?'
DATA4 DB 'EROR:The Identification Number must be 4-BIT HEX','$'
DATA5 DB ''WRONG ENTRY'Your Identification Number must contain data from 0-->9 or A-->F','$'
DATA6 DW 0AAAAH,0BBBBH,0CCCCH,0DDDDH,0EEEEH,0FFFFH,1111H,2222H,3333H,4444H ;IDs
DATA7 DW 5555H,6666H,7777H,8888H,9999H,0100H,0200H,0300H,0400H,5667H
DATA8 DW 1111H,2222H,3333H,4444H,5555H,6666H,000AH,000BH,000CH,000DH ;passwords
DATA9 DW 000FH,000EH,0001H,0002H,0003H,0A00H,0B00H,0C00H,0D00H,0A0AH
DATAA DB 'Your ID is wrong, Please try again!!','$'
DATAB DB 'Please enter your password : ','$'
DATAC DB 5,?,5 DUP (?)
DATAD DB 'Access Allowed','$'
DATAE DB 'Access Denied','$'
DATAF DB 00H
DATAG DB '---------------------------------------------------------------','$'
DATAH DB 'Secrity Lock','$'
;-----------------
.CODE
MAIN PROC FAR
MOV AX,@DATA ;move offset of data segment to AX
MOV DS,AX ;move AX to DS
MOV ES,AX ;Make DS and ES OVERLAP
MOV DH,00H ;Initialize DH With zeros
CALL CLEAR ;Call CLEAR screen procedure
MOV BP,OFFSET DATAF ;move Offset DataF to BP to use it in setting cursor
START: CALL SETCURSOR ;Call SETCURSOR procedure
CALL ENTRY ;Call ENTRY,which displays the message
CALL SETCURSOR ;Call SETCURSOR again to print a new line
ID: CALL WELCOME ;Call WELCOME,scans the user ID
CALL NOTLET4 ;Call NO.LET , checks if the number of digits you entered is less than 4
CALL CHECK ;Call CHECK , checks wether the scanned number is in range (0-->9 aw a-->f aw A-->F) or not
MOV SI,OFFSET DATA2+2 ;Initialize SI to point to the ID data in memory
CALL PUTIDINAX ;Call PUTIDINAX,puts the ID coming from memory in AX
CALL CHECKID ;Call CHECKID ,checks wether the entered ID is correct or not
CALL SETCURSOR
CALL GETPASS ;Call GETPASS ,scans the password from the user
MOV SI,OFFSET DATAC+2
CALL PUTIDINAX ;Call PUTIDINAX,puts the ID coming from memory in AX
CALL CHECKPASS ;Call CHECKPASS, checks wether the scanned password is correct or wrong
CALL SETCURSOR
CALL ENTER ;Call ENTER, if password is correct then access is allowed
NO_ERROR: CALL SETCURSOR
CALL NOERROR ;check if the entered nmber is less than 4!!
WR_ENT: CALL SETCURSOR
CALL WRONGENTRY ;check if the number is between 0 --> 9 or a --> f or A --> F
WRONGID: CALL SETCURSOR
CALL WRONG_ID
WRONGPASS: CALL SETCURSOR
CALL WRONG_PW
MOV AH,4CH
INT 21H
MAIN ENDP
;----------------
CLEAR PROC
MOV AX,0600H
MOV BH,07
MOV CX,0000
MOV DH,24
MOV DL,79
INT 10H
RET
CLEAR ENDP
;----------------
ENTRY PROC
MOV AH,09H
MOV DX,OFFSET DATAH
INT 21H
CALL SETCURSOR
MOV AH,09H
RET
ENTRY ENDP
;--------------
SETCURSOR PROC
MOV AH,02H
MOV BH,00
MOV DL,00
MOV DH,DS:[BP] ;coloumn ;row
INT 10H
ADD DS:[BP],1
RET
SETCURSOR ENDP
;----------------
WELCOME PROC
MOV AH,09H
LEA DX,DATA3
INT 21H
MOV AH,0AH
MOV DX,OFFSET DATA2
INT 21H
RET
WELCOME ENDP
;----------------
NOTLET4 PROC
LEA SI,DATA2+1
CMP [SI],04H
JNZ NO_ERROR
RET
NOTLET4 ENDP
;----------------
CHECK PROC
MOV AH,4
LEA SI,DATA2+2
AGAIN: LEA DI,DATA1
MOV CX,23
MOV AL,[SI]
REPNZ SCASB
CMP CX,00
JZ END
INC SI
DEC AH
JNZ AGAIN
RET
END: JMP WR_ENT
CHECK ENDP
;----------------
NOERROR PROC
MOV AH,09H
MOV DX,OFFSET DATA4
INT 21H
CALL Line
JMP START
RET
NOERROR ENDP
;---------------
WRONGENTRY PROC
MOV AH,09H
MOV DX,OFFSET DATA5
INT 21H
CALL Line
JMP START
RET
WRONGENTRY ENDP
;--------------
PUTIDINAX PROC
MOV CX,04H
AGAIN2: CMP [SI],39H
JZ ZERO
JB ZERO
JA OVER
ZERO: SUB [SI],30H
JMP STAR
OVER: CMP [SI],70
JZ CAPITAL
JB CAPITAL
JA SMALL
CAPITAL: SUB [SI],55
JMP STAR
SMALL: SUB [SI],87
JMP STAR
STAR: INC SI
DEC CX
JNZ AGAIN2
SUB SI,4
MOV AH,[SI]
MOV AL,[SI+2]
MOV BH,[SI+1]
MOV BL,[SI+3]
SHL AX,4
OR AX,BX
RET
PUTIDINAX ENDP
;--------------
CHECKID PROC
MOV CX,21 ; Set the counter to 21 decimal
LEA DI,DATA6 ; DI = OFFSET DATA6
CLD ; DF = 0 (AUTO INCREAMENT)
REPNE SCASW ; Check if the ID exists or not
CMP CX,0000H ; Check if the ID exists or not
JZ WRONGID ; If not exists jump to WRONGID
RET
CHECKID ENDP
;--------------
WRONG_ID PROC
MOV AH,09H
MOV DX,OFFSET DATAA
INT 21H
CALL Line
JMP START
RET
WRONG_ID ENDP
;-------------
GETPASS PROC
MOV AH,09H
MOV DX,OFFSET DATAB
INT 21H
MOV AH,0AH
MOV DX,OFFSET DATAC
INT 21H
RET
GETPASS ENDP
;-------------
CHECKPASS PROC
MOV BX,AX
ADD DI,38 ; If exist, jump to the password which equivalent to that ID
CMP BX,[DI] ; Check if the password correct or not
JNZ WRONGPASS
RET
CHECKPASS ENDP
;-------------
ENTER PROC
MOV AH,09H
MOV DX,OFFSET DATAD
INT 21H
CALL Line
JMP START
RET
ENTER ENDP
;------------
WRONG_PW PROC
MOV AH,09H
MOV DX,OFFSET DATAE
INT 21H
CALL Line
JMP START
WRONG_PW ENDP
;------------
Line PROC
CALL SETCURSOR
MOV AH,09H
MOV DX,OFFSET DATAG
INT 21H
RET
Line ENDP
;-----------
END MAIN