What is the function of INT 10H with AH 09h?
Interrupt number 10h (INT 10h)
| INT 10h Service no. 09h | Inputs any |
|---|---|
| AH=09h; write Character and attribute at cursor position | input AL =Character to Display. BH =page number. BL =attribute. CX =number of times to write Character. |
What is the function of INT 10H interrupt with AH 02H?
Int 10h functions
| Function Number | Description |
|---|---|
| AH=01h | Set text-mode cursor shape |
| AH=02h | Set cursor position |
| AH=03h | Get cursor position and shape |
| AH=04h | Read light pen position (Does not work on VGA systems) |
What is the use of INT 10H?
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 INT 21H and INT 10H?
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.
How do you use INT 21h?
INT 21H will generate the software interrupt 0x21 (33 in decimal), causing the function pointed to by the 34th vector in the interrupt table to be executed, which is typically an MS-DOS API call. This simply means that you are using function 01h of the Interrupt type 21…
How do you use INT 21H?
What is the function of INT 21h?
INT 21h – The general function despatcher
| Action: | Writes a string to the display. |
|---|---|
| On entry: | AH = 09h DS:DX = segment:offset of string |
| Returns: | Nothing |
| Notes: | The string must be terminated by the $ character (24h), which is not transmitted. Any ASCII codes can be embedded within the string. |
What is the use of INT 21h?
3 Answers. INT 21H will generate the software interrupt 0x21 (33 in decimal), causing the function pointed to by the 34th vector in the interrupt table to be executed, which is typically an MS-DOS API call. This simply means that you are using function 01h of the Interrupt type 21…
What is the use of int 3h instruction?
The INT 3 instruction generates a special one byte opcode (CC) that is intended for calling the debug exception handler. (This one byte form is valuable because it can be used to replace the first byte of any instruction with a breakpoint, including other one byte instructions, without over-writing other code).
How do you use int 21H?
What’s the difference between INT 10h and INT 21h?
• INT 10H and INT 21H are the most widely used with various functions selected by the value in the AH register. The x86 PC Assembly Language, Design, and Interfacing By Muhammad Ali Mazidi, Janice Gillespie Mazidi and Danny Causey © 2010, 2003, 2000, 1998 Pearson Higher Education, Inc. Pearson Prentice Hall -Upper Saddle River, NJ 07458
How many interrupts are there in INT 10h?
–Saves CS:IP and the flags on the stack and goes to the subroutine associated with that interrupt. –In x86 processors, 256 interrupts, numbered 00 to FF. • INT 10H and INT 21H are the most widely used with various functions selected by the value in the AH register.
How to program INT 10h in text mode?
4.1: BIOS INT 10H PROGRAMMING monitor screen in text mode • The monitor screen in the x86 PC is divided into 80 columns and 25 rows in normal text mode. –Columns are numbered from 0 to 79.
Who are the authors of the INT 10h programming language?
The x86 PC Assembly Language, Design, and Interfacing By Muhammad Ali Mazidi, Janice Gillespie Mazidi and Danny Causey © 2010, 2003, 2000, 1998 Pearson Higher Education, Inc. Pearson Prentice Hall -Upper Saddle River, NJ 07458 4.1: BIOS INT 10H PROGRAMMING • INT 10H subroutines are burned into the ROM BIOS.