äINT Similar to the Call
instruction
äINT
nn executes the following sequence of
instructions
äPUSH
flags,CS, and IP Registers onto Stack
äIP and CS registers are loaded with the contents of the two words
at the absolute memory addresses 0:nn*4 and 0:nn*4+2
äProgram control jumps to the address contained in these two
absolute memory locations
äAddress locations 0:0 through 0:3FFH are an interrupt
vector (table) and contain starting addresses of subroutines you may want to execute
äTo
finish an interrupt, use IRET
äIt
restores CS, IP and flags in the proper order
äNot
RET only restores IP (or IP and CS for FAR call)