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From: rdthomps@vela.acs.oakland.edu (Robert D. Thompson)
Newsgroups: comp.windows.ms.programmer
Subject: HAS ANYONE HAD ANY LUCK WITH IRQ...
Message-ID: <7485@vela.acs.oakland.edu>
Date: 24 Jun 91 15:00:20 GMT
Reply-To: rdthomps@vela.acs.oakland.edu (Robert D. Thompson)
Organization: Oakland University, Rochester MI
Lines: 47


	One of the drawbacks of Windows *3.0* is that it seems
	that you can only use two COM ports simultaneously.

	This seems to be due to Windows "re-routing" interrupt
	requests for who-knows-why.

	The default settings for IRQ in the system.ini are,

		COM1Irq = 4
		COM2Irq = 3
		COM3Irq = 4
		COM4Irq = 3

	Obviously under this scenario you could not have two
	devices working simultaneously off Irq4 (COM1, COM3).

	However, you can change the Irq to other values.

	However2, setting one to Irq2 or Irq5 does not work
	because all IRQ2's also cause a subsequent IRQ4.

	Why did Mickysoft do this?

	If the Irq was needed *and used* than it would be
	fine.  As it stands, IRQ2's seem to be routed to
	IRQ4's and IRQ5 seem to be routed to IRQ3's.

	WHAT A WASTE !!!

	Now for my question, 

		Has anybody had luck with IRQ9 ????

		Or any other IRQ for that matter.

	My modem only allows me to set the Jumpers for IRQ2
	or IRQ5.

	I would appreciate any comments from anyone who
	has been able to get the other IRQ's to work
	*simultaneously*.

	Thanks...Regards |(8>
---
Robert
rdthomps@vela.acs.oakland.edu