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From: deano@rpp386.cactus.org (Dean Carpenter)
Newsgroups: comp.dcom.modems,comp.sys.ibm.pc,comp.unix.questions,unix-pc.general
Subject: Help in modifying an IBM 0-12meg board for COM3
Keywords: serial xenix com modify
Message-ID: <18005@rpp386.cactus.org>
Date: 21 Feb 90 05:54:54 GMT
Distribution: usa
Organization: Itty Bitty Machines (resident mad Aussie)
Lines: 20

I have an IBM AT running SCO Xenix 2.2.1 with 3 IBM 0-12meg boards in it.
Each board has a serial and parallel port on, each of which can be configured
for 1 or 2.  IE: com1: or com2:

Unfortunately this means that one boards' IO capability is being wasted.
Does anyone know how to modify a board to allow the comm port to respond
to a different interrupt and base address ?

	port	irq	addr
	com1:	4	0x3f8
	com2:	3	0x2f8
	com3:	2	0x3e8

Basically, I want a com3: on the currently unused board.  Hopefully this
would only require some minor surgury, cutting and pasting a couple of
traces.  Hopefully.  Can anyone help ?
-- 
Dean Carpenter				
...{bigtex|texbell}!rpp386!bunyip!deano	   		   (preferred)
...cs.utexas.edu:ibmchs!auschs!deano.austin.ibm.com!deano  (sometimes sporadic)