Path: utzoo!utgpu!water!watmath!clyde!rutgers!ucla-cs!wales
From: wales@CS.UCLA.EDU
Newsgroups: comp.sys.ibm.pc
Subject: Re: COM3,COM4
Message-ID: <9983@shemp.UCLA.EDU>
Date: 18 Dec 87 06:11:19 GMT
References: <164300022@uiucdcsb> <412@wa3wbu.UUCP> <13091@beta.UUCP> <20049@yale-celray.yale.UUCP>
Sender: root@CS.UCLA.EDU
Reply-To: wales@CS.UCLA.EDU (Rich Wales)
Organization: UCLA CS Department, Los Angeles
Lines: 15

In article <20049@yale-celray.yale.UUCP>
    {backbone}!esquire!kthomas!kthomas writes:

>Does anybody know the interrupt number and (base) port address for
>com3 and com4 on the pc/xt/at ?

According to Appendix D of my ProComm 2.4.2 manual:

    COM3 has a base port address of 3E8h and interrupts at IRQ4.
    COM4 has a base port address of 2E8h and interrupts at IRQ3.

-- Rich Wales // UCLA Computer Science Department // +1 (213) 825-5683
	3531 Boelter Hall // Los Angeles, California 90024-1596 // USA
	wales@CS.UCLA.EDU           ...!(ucbvax,rutgers)!ucla-cs!wales
"Sir, there is a multilegged creature crawling on your shoulder."