Re: LSS and MOV SS
- From: spamtrap@xxxxxxxxxx
- Date: Tue, 21 Mar 2006 03:53:09 -0600
On Tue, 21 Mar 2006 06:48:35 GMT, Tim Roberts <spamtrap@xxxxxxxxxx>
wrote:
"Mark Whitlock" <spamtrap@xxxxxxxxxx> wrote:
Spamt ,
Don't you use cli to stop interrupts before the
move and sti to restart them afterwards ?
It's not necessary. The MOV SS,xx instruction automatically disables
interrupts for one instruction, to allow SP and SS to be loaded atomically.
Try using debug to single step through a MOV SS/MOV SP pair; it doesn't
stop in between them.
Except for a buggy version of the 8086/8 where the cli/sti are
necessary.
<snip>
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