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From: dav@abvax.UUCP (Dave A. Vasko)
Newsgroups: comp.sys.ibm.pc
Subject: Help , COM3 and COM4 ports.
Message-ID: <749@abvax.UUCP>
Date: 12 Jun 89 14:00:56 GMT
Organization: Allen-Bradley Company, Inc; Industrial Computer Division, Highland Heights, OH
Lines: 21


We are planing on connecting four serial ports to an IBM AT compatible
computer. Is there a standard I/O address location for COM3 and COM4. 
If not is there a set of addresses that are commonly used. Also what
interrupt levels are used with COM3 and COM4.

		PORT    ADDRESS      INTERRUPT 
		COM1	3F8-3FF      IRQ4
		COM2	2F8-2FF      IRQ3
		COM3    ?            ?
		COM4    ?            ?

Any help on this subject would be sincerely appreciated.

			Dave Vasko

-- 
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* Dave Vasko                Allen-Bradley  Highland Hts. Ohio 44143        *
* (216) 646-4695            ...!{decvax,pyramid,cwjcc}!abvax!dav           *
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