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Short note on: int-21h services
written 7.3 years ago by gravatar for vinayakprabhutendolkar vinayakprabhutendolkar • 230 modified 3.8 years ago by gravatar for DevarenjiniP DevarenjiniP • 3.2k
microprocessors and peripherals
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written 3.8 years ago by gravatar for DevarenjiniP DevarenjiniP • 3.2k

"INT 21H" in 8086 microprocessor

There are four different functions of INT 21H:

  1. MOV AH, 01H

INT 21H

These two instructions together will accept one single charactor from keyboard and store it in AL register

  1. MOV AH, 02H INT 21H

These two instructions will display a single charactor stored in …

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