C Program to Display and Set System Time and Date Using 8086 Interrupts

This is a C Program to Display and Set System Time and Date Using 8086 Interrupts. Interrupt number 21 (in hexadecimal) is used to:

Output of c Program to get and set system time and date 

• Get System time
• Set System time
• Get System Date
• Set System Date

To Get system date:

- Call interrupt 0x21 (hexadecimal) 

- AH (higher byte of accumulator) should be made equal to 2A (hex) before calling interrupt

Output:

C Program to Display SCAN and ASCII Codes of Keys on Keyboard Using 8086 Interrupt

Output (ASCII and SCAN code) when a is pressed

This program displays SCAN code and ASCII code of any key pressed on the keyboard. We use inregs is made zero in the program. Then interrupt 16h is called using int86() function in dos.h. The arguments are interrupt number (in hexadecimal ; in C 0x16) pointer to input register and pointer to output register.