NetNews Usenet Archive 1992 #20/NN_1992_20.iso/spool/comp/dcom/modems/13322

Internet Message Format | 1992-09-12 | 1.6 KB

Xref: sparky comp.dcom.modems:13322 comp.sys.ibm.pc.hardware:24120
Newsgroups: comp.dcom.modems,comp.sys.ibm.pc.hardware
Path: sparky!uunet!cs.utexas.edu!sun-barr!ames!pacbell.com!network.ucsd.edu!qualcom.qualcomm.com!cancun!rdippold
From: [e-mail] (Ron Dippold)
Subject: Re: Why does my PC sometimes hang when the phone rings?
Message-ID: <rdippold.716352291@cancun>
Sender: [e-mail]
Nntp-Posting-Host: cancun.qualcomm.com
Organization: Qualcomm, Inc., San Diego, CA
References: <[e-mail]>
Date: Sun, 13 Sep 1992 02:44:51 GMT
Lines: 20

[e-mail] (Richard Stanton) writes:
>Earlier today, I had been using MS-KERMIT to dial in to a computer.
>I logged off, hung up, and exited. A little while later (while in the
>middle of another program, unrelated to serial communications), the
>phone rang and my PC completely froze, requiring a hard reboot.

A plausible guess:  the MS-KERMIT you have is setting up an interrupt
handler for the communications port.  When it is exiting, it is not
de-installing it correctly.  Thus, when your phone rings, the modem
tries to send a "RING" to your computer.  This activates the serial
port interrupt which should have been disabled and the computer starts
executing code at where the interrupt handler used to live.  Or
something similar.  Try a newer version of MS-KERMIT, or try briefly
running another term program after it, it might restore things correctly.


--
Anytime I see something screech across a room and latch onto someones
neck, and the guy screams and tries to get it off, I have to laugh,
because what IS that thing? -- Handey