Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!usc!wuarchive!uunet!dialogic!gerry
From: gerry@dialogic.com (Gerry Lachac)
Newsgroups: comp.os.os2.programmer
Subject: Sharing Interrupts on a PS/2
Keywords: driver sharing interrupts PS/2
Message-ID: <1991May31.194019.3122@dialogic.com>
Date: 31 May 91 19:40:19 GMT
Organization: Dialogic Corporation
Lines: 25


I have a question concerning the sharing of interrupts by a device
driver on a PS/2.  If I have two drivers that request the same
interrupt using the SetIRQ DevHlp, which ISR (interrupt service
routine) is called first?  For example :

	Driver A calls  SetIRQ(3,ISRa) and later,
	Driver B calls  SetIRQ(3,ISRb)


When an interrupt 3 comes in, does OS/2 call Driver A's ISR first
(since it was the first set) or Driver B's?



-gerry




-- 
uunet!dialogic!gerry   | "Even a dead plant turns  |	Dialogic Corporation
	OR	       |  over a new leaf 	   |	300 Littleton Rd
gerry@dialogic.UUCP    |  when the wind blows."	   |	Parsippany, NJ 07054 
		       |  			   |	(201)334-8450