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What is the purpose of 10H function?

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What is the purpose of 10H function?

INT 10h, INT 10H or INT 16 is shorthand for BIOS interrupt call 10hex, the 17th interrupt vector in an x86-based computer system. The BIOS typically sets up a real mode interrupt handler at this vector that provides video services.

What is BIOS and DOS interrupts?

DOS and BIOS interrupts are used to perform some very useful functions, such as displaying data to the monitor, reading data from keyboard, etc. They are used by identifying the interrupt option type, which is the value stored in register AH and providing, whatever extra information that the specific option requires.

What is INT 21H and INT 10H?

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Use INT 10H function calls to: – Clear the screen. – Set the cursor position. – Write characters to the screen in text mode. Use INT 21H function calls to: – Input characters from the keyboard. – Output characters to the screen.

What are uses of interrupts?

Typical uses Interrupts are commonly used to service hardware timers, transfer data to and from storage (e.g., disk I/O) and communication interfaces (e.g., UART, Ethernet), handle keyboard and mouse events, and to respond to any other time-sensitive events as required by the application system.

What does int 0x10 do?

Each INT represents a functions family, where usually AH represents the function number. For example : INT 0x10 is used for screen manipulation.

Which of the following is BIOS level interrupt?

The BIOS increments the time-of-day counter during this interrupt. This is the Keyboard interrupt. This is generally triggered when a key on a keyboard is pressed….Interrupt table.

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AH Description
01h Read Input Status
02h Read Keyboard Shift Status
05h Store Keystroke in Keyboard Buffer
10h Read Character Extended

What is the difference between BIOS and DOS?

BIOS stands for Basic Input Output System – it talks directly to the hardware, and is what the computer runs when it boots. The BIOS loads DOS, and DOS talks to the hardware through BIOS. DOS is the operating system, in this example. BIOS is the firmware, DOS for lack of word describing !

Which register is generally used to specify the service number of an interrupt?

The IRR is used to specify which interrupts are pending acknowledgment. The in-service register is used to indicate which interrupts have already been acknowledged and are being serviced by the processor. Each PIC also has an interrupt command/status register (ICR) and an interrupt mask/data register (IMR).

What advantage do interrupts have over polling?

Advantages of Interrupt over Polling. The first advantage is- the performance of microcontroller is far better in Interrupt method than Polling Method. In polling method, the microcontroller is checking continuously whether the device is ready or not, but the chances of data loss are greater in Polling than Interrupt.

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What are the three types of interrupts?

Types of Interrupts

  • Internal Interrupt.
  • Software Interrupt.
  • External Interrupt.

What does 0x0E mean?

Convert decimal to binary, octal and hexadecimal

Decimal Octal Hexadecimal
14 /016 0x0E
15 /017 0x0F
16 /020 0x10
17 /021 0x11

What is the function of 4Ch under INT 21h?

INT 21h function 4Ch is preferred. Action: Reads a character from the standard input device and echoes it to the standard output device. If no character is ready it waits until one is available.