8051 based project That can save up to 60 codes with max of 6 combination of numbers

hi onyot, the program i posted has a save function and compare. Meaning, if u enter the correct passwrd it will check the user inputed password and activate p3.4 if password is correct. . Just check the code and get an idea from there.
the default password of the system is in the array 12345. U can add more combination f u want.

it would be easy f u use 16x2 lcd than 7segment and do multiplexing. Less wiring and less ports to be use in using 4bit programming of lcd. The advantage of lcd is u can display words before and after the user enter the code. Hence, 8 s more presentable than 7segment

then how can I put another password, am I going to put passworda,passwordb or in that array, I'll just put a comma beside that "12345", 23456"?

so, do you know where to buy a 16x2 lcd? hehehhe

yes, u can declare another password inside the array then do a checking algorithm in the array location f user enters a passwrd.

do you have any recommended reference on how to interface a 16x2 lcd on at89c2051?

hi onyot, we r n the philippines hehe so u can order lcd in rsphilippines or egizmo. Gpa himu ka ana sa companya? Asa ka ng ojt?

If i were u, do a simple password program first before moving into lcd interfacing

Naa ko pilmico, Okay. I've understand the program but I am not sure if it will coincide to what you've know, that is why I've ask so many questions. Sorry if I'm a disturbance to you guys. hehehehe.....

is it correct?

unsigned char displayb [4][3]={1,2,3, 4,5,6,7,8,9, 0,0,0}

hi

unsigned char displayb [4][3]={1,2,3, 4,5,6,7,8,9, 0,0,0}

here u r going to declare array of 4*3
4 rows and 3 column array no need here
simply do

unsigned char code displayb[]="123456789000";

if u want two seperate passwords then

unsigned char code displaya[]="12345";
unsigned char code displayb[]="6789000";

as reference to ur 7-seg multiplexing schmetic u r right there
code will enable the piece to display using transistors