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INT Similar to the Call instruction
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INT
nn executes the following sequence
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of
instructions
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PUSH
flags,CS, and IP Registers onto Stack
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IP
and CS registers are loaded with the contents
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of
the two words at the absolute memory
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addresses
0:nn*4 and 0:nn*4+2
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Program
control jumps to the address contained
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in
these two absolute memory locations
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Address
locations 0:0 through 0:3FFH are an
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interrupt
vector (table) and contain starting
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addresses
of subroutines you may want to
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execute
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To
finish an interrupt, use IRET
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It
restores CS, IP and flags in the proper order
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Not
RET only restores IP (or IP and CS for
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FAR
call)
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