X-Authentication-Warning:	delorie.com: mail set sender to djgpp-bounces using -f
X-Recipient:	djgpp AT delorie DOT com
From:	"Gerrit van Niekerk" <gerritvn AT gpvno DOT co DOT za>
Organization:	GPvNO
To:	djgpp AT delorie DOT com
Date:	Mon, 21 Jan 2008 22:13:10 +0200
MIME-Version:	1.0
Subject:	RM/PM ISR
Message-ID:	<479518F6.7820.CAEFE78@gerritvn.gpvno.co.za>
X-mailer:	Pegasus Mail for Windows (4.41)
Reply-To:	djgpp AT delorie DOT com

Looking at the GDB serial port driver SER-GO32.C, I notice that the RM ISR is implemented as a 
_go32_dpmi_allocate_real_mode_callback_iret to the PM ISR.

My question: Is there really an advantage in implementing a RM ISR this way? An interrupt in RM 
will result in a switch to PM which would have happened anyway if there was no RM ISR and the 
interrupt got reflected to PM. Anything I'm missing?

- Raw text -