Application

In the Proteus simulation environment, design a password authenticating circuit using the following components

Make it$.$ The design will work according to the following rules.

Components

$1.8086$ Microprocessor $-1$ piece

$2.74273$ Octal Type D Flip$-$Flop $-3$ pieces

$3.74154$ Demultiplexer $-1$ piece

$4.8255$ P$$A $-1$ piece

$5.$ Button $($Switch$)-8$ pcs

$6.7-$Piece Indicator with Common Anode Tip $-1$ piece

$7.$ Resistors:

$-$ Pull$-$down resistor for $8$ switches $(100)$

$-1$ pull$-$up resistor for reset switch $(10$ k$)$

Requirements:

$1.$ Port Forwarding:

$-8255\text{'}$s port addresses will be dynamically determined based on the student number.

$-$ Address Calculation:

o Base address: $100$H $+8*($StudentNo $\%200)$

o Ports

$$ Port A: Base address.

$$ Port B: Base address $+2.$

$$ Port C: Basic address $+4.$

$$ Control Port: Base address $+6.$

$-$ With this method, each student's circuit will use a unique port address.

configured.

$2.$ Login and Password Authentication:

$-8$ switches $($buttons$)$: Connected to the input port. Manual entry will be made with these keys. Each

The key will function as a one$-$bit input.

$-$ Password check: The input will be compared with the password set by the microprocessor.

o If the input is correct:

$$ The $7-$piece indicator will light all LEDs to show the number $8.$

o If the input is incorrect:

$$ The $7-$part indicator will go off and no LEDs will be lit.

$3.$ Reset Button:

$-$ A reset button will be connected to terminal $4$ of the input port.

$-$ Negative triggering: Reset operation