Question about INT's

[Patrick Lindenberg]

Hi All,

where is the CS:IP saved before calling interrupt vectors?
i try to emulate task sitch in real mode.

Thax in advance!

[roswell]

On the stack.

Look at Intel's Programmer Guide

Roswell

[Kernel Panic]

After a software or hardware interrupt is called, you get cs, ip and flags pushed on stack, like roswell said. Your stack looks like this (in real mode):
flags
cs
ip  <-- stack top
In case you are running in protected mode (with CS being 32-bit selector; not sure about virtual mode or CS being a 16-bit selector) you get:
eflags
a dword with cs in the least-significant word, 0 in the MSW
eip <--stack top
If it's real mode, it should be rather easy..