Int
is an assembly level instruction for x86 architectures microprocessors that generates a software interrupt. After calling an interrupt, the the processor calls one of the 256 functions pointed to by the interrupt address table.
INT 10H
- It is a shorthand for BIOS interrupt call 10hex which is used to provide video services. It is actually quite slow as the OS needs to switch between real mode and protected mode/ long mode which is an expensive operation.