/*
* Project name:
  "AND logic operator "&" 
 
*  MCU:             PIC16f877A
  Oscillator:      4 MHz
*/
sbit OUT0 at PORTD.B0; // this is where OUTPUT OUT0 is fully defined
sbit OUT1 at PORTD.B1; // this is where OUTPUT OUT1 is fully defined
sbit OUT2 at PORTD.B2; // this is where OUTPUT OUT2 is fully defined
sbit OUT3 at PORTD.B3; // this is where OUTPUT OUT3 is fully defined
sbit OUT4 at PORTD.B4; // this is where OUTPUT OUT4 is fully defined
sbit OUT5 at PORTD.B5; // this is where OUTPUT OUT5 is fully defined
sbit OUT6 at PORTD.B6; // this is where OUTPUT OUT6 is fully defined
sbit OUT7 at PORTD.B7; // this is where OUTPUT OUT7 is fully defined
sbit IN0 at PORTC.B0; // this is where INPUT IN0 is fully defined
sbit IN1 at PORTC.B1; // this is where INPUT IN1 is fully defined
sbit IN2 at PORTC.B2; // this is where INPUT IN2 is fully defined
sbit IN3 at PORTC.B3; // this is where INPUT IN3 is fully defined
sbit IN4 at PORTC.B4; // this is where INPUT IN4 is fully defined
sbit IN5 at PORTC.B5; // this is where INPUT IN5 is fully defined
sbit IN6 at PORTC.B6; // this is where INPUT IN6 is fully defined
sbit IN7 at PORTC.B7; // this is where INPUT IN7 is fully defined
void main(){
 
TRISD = 0;        // set PORTD as Output
TRISC = 0XFF;  // PORTC as Inputs
PORTD = 0 ;  //Clear Outputs
while (1) {           // endless Loop 
 if(IN0&IN1) OUT0=1; else OUT0=0;// if input0 "AND" input1 Is ON , output0 will be ON else OFF
 
}
}

/*
* Project name:
    "OR logic operator "|" 
 
*  MCU:             PIC16f877A
    Oscillator:      4 MHz
*/
sbit OUT0 at PORTD.B0; // this is where OUTPUT OUT0 is fully defined
sbit OUT1 at PORTD.B1; // this is where OUTPUT OUT1 is fully defined
sbit OUT2 at PORTD.B2; // this is where OUTPUT OUT2 is fully defined
sbit OUT3 at PORTD.B3; // this is where OUTPUT OUT3 is fully defined
sbit OUT4 at PORTD.B4; // this is where OUTPUT OUT4 is fully defined
sbit OUT5 at PORTD.B5; // this is where OUTPUT OUT5 is fully defined
sbit OUT6 at PORTD.B6; // this is where OUTPUT OUT6 is fully defined
sbit OUT7 at PORTD.B7; // this is where OUTPUT OUT7 is fully defined
sbit IN0 at PORTC.B0; // this is where INPUT IN0 is fully defined
sbit IN1 at PORTC.B1; // this is where INPUT IN1 is fully defined
sbit IN2 at PORTC.B2; // this is where INPUT IN2 is fully defined
sbit IN3 at PORTC.B3; // this is where INPUT IN3 is fully defined
sbit IN4 at PORTC.B4; // this is where INPUT IN4 is fully defined
sbit IN5 at PORTC.B5; // this is where INPUT IN5 is fully defined
sbit IN6 at PORTC.B6; // this is where INPUT IN6 is fully defined
sbit IN7 at PORTC.B7; // this is where INPUT IN7 is fully defined
void main(){
 
 TRISD = 0;        // set PORTD as Output
 TRISC = 0XFF;  // PORTC as Inputs
 PORTD = 0 ;  //Clear Outputs
 while (1) {           // endless Loop 
   if(IN0|IN1) OUT0=1; else OUT0=0;// if input0 "OR" input1 Is ON , output0 will be ON else OFF
 
 }
}

/*
* Project name:
    "XOR logic operator "|" 
 
*  MCU:             PIC16f877A
    Oscillator:      4 MHz
*/
sbit OUT0 at PORTD.B0; // this is where OUTPUT OUT0 is fully defined
sbit OUT1 at PORTD.B1; // this is where OUTPUT OUT1 is fully defined
sbit OUT2 at PORTD.B2; // this is where OUTPUT OUT2 is fully defined
sbit OUT3 at PORTD.B3; // this is where OUTPUT OUT3 is fully defined
sbit OUT4 at PORTD.B4; // this is where OUTPUT OUT4 is fully defined
sbit OUT5 at PORTD.B5; // this is where OUTPUT OUT5 is fully defined
sbit OUT6 at PORTD.B6; // this is where OUTPUT OUT6 is fully defined
sbit OUT7 at PORTD.B7; // this is where OUTPUT OUT7 is fully defined
sbit IN0 at PORTC.B0; // this is where INPUT IN0 is fully defined
sbit IN1 at PORTC.B1; // this is where INPUT IN1 is fully defined
sbit IN2 at PORTC.B2; // this is where INPUT IN2 is fully defined
sbit IN3 at PORTC.B3; // this is where INPUT IN3 is fully defined
sbit IN4 at PORTC.B4; // this is where INPUT IN4 is fully defined
sbit IN5 at PORTC.B5; // this is where INPUT IN5 is fully defined
sbit IN6 at PORTC.B6; // this is where INPUT IN6 is fully defined
sbit IN7 at PORTC.B7; // this is where INPUT IN7 is fully defined
void main(){
 
 TRISD = 0;        // set PORTD as Output
 TRISC = 0XFF;  // PORTC as Inputs
 PORTD = 0 ;  //Clear Outputs
 while (1) {           // endless Loop 
   if(IN0^IN1) OUT0=1; else OUT0=0;// if input0 "XOR" input1 Is ON , output0 will be ON else OFF
 
 }
}