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From: nef@mace.cc.purdue.edu (paulhicks)
Newsgroups: comp.sys.ibm.pc.hardware
Subject: Re: Zenith 150 Serial Port Help
Message-ID: <7523@mace.cc.purdue.edu>
Date: 22 May 91 20:39:19 GMT
References: <7907@oasys.dt.navy.mil>
Reply-To: nef@mace.cc.purdue.edu (paulhicks)
Organization: Purdue University
Lines: 20

In article <7907@oasys.dt.navy.mil> harvey@oasys.dt.navy.mil (Betty Harvey) writes:
>My question:  Does anyone know which switches or jumpers I should reset
>on the board to reset the COM port to COM1 so I can take the interal
>Hayes modem out, or does anyone have any theories why I can't get
>video back from the modem? 
>
I am looking at the manual right now for the Zenith Z-100 series.
On the Video board, there is a switch(SW301)with two settings,IRQ4+IRQ3,
it is located toward the bottom of the board, away from the 
bus.  The manual says for switch SW301
SWITCH 
SECTION POSITION	FUNCTION

2    	ON	SERIAL PORT IS ADDRESSED AS COM1 (IRQ4)
	OFF	SERIAL PORT IS ADDRESSED AS COM2 (IRQ3)

As ussual, I accept no responsibility for your actions
Although I do hope that this info helps!

Good luck, Paul