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From: cur022%cluster@ukc.ac.uk (Bob Eager)
Newsgroups: comp.os.msdos.programmer,comp.os.os2.programmer
Subject: Re: Info on Changing Stacks in protected mode
Message-ID: <22176.27f4b613@cluster@ukc.ac.uk>
Date: 30 Mar 91 16:00:19 GMT
References: <1991Mar29.155840.2626@netcom.COM>
Organization: Computing Lab, University of Kent at Canterbury, UK.
Lines: 13

In article <1991Mar29.155840.2626@netcom.COM>, resnicks@netcom.COM (Steve Resnick) writes:
> OS/2 will not let me clear interrupts while changing SS:SP.  My question:
> Is it necessary to disable interrupts while switching stacks in protected 
> mode?

Unless you have a very early (buggy) 8088 chip (unlikely on OS/2) you
don't need to disable interrupts anyway. I quote from the 80286
Programmer's Reference Manual: "Any move into SS will disable interrupts
until after the execution of the next instruction".
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Bob Eager                | University of Kent at Canterbury
                         | +44 227 764000 ext 7589
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