TIP: Click on subject to list as thread! ANSI
echo: 80xxx
to: SCOTT MCNAY
from: PETER MAGNUSSON
date: 1998-01-03 12:05:00
subject: Code in Boot Sector

 SM> Such as?
mov al,ah
xor
etc etc. A lot of simple instructions have they used
optional opcodes for. It varies in versions, but it's
kind of typical that anything that has anything to do
with AMI at least contains one unusual opcode...
I could send you some more specific example when I get
back home if you want me to...
 SM> Maybe they had security in mind?
Well... I tried to replace then with other opcodes in
one example, and obviously there was SOME diffrence,
because it bugged out. but it worked with the opcode
AMI had used.
Although I don't see any security strength in it??
[peter]
--- FMail/386 1.02
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* Origin: Server*7GB* D0S.0S2.WiN USR33600 0300-13564 (2:203/253)

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