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- Path: sparky!uunet!spool.mu.edu!uwm.edu!ogicse!qiclab!leonard
- From: leonard@qiclab.scn.rain.com (Leonard Erickson)
- Newsgroups: comp.sys.ibm.pc.misc
- Subject: Re: To many print screens
- Message-ID: <1992Dec18.220231.18012@qiclab.scn.rain.com>
- Date: 18 Dec 92 22:02:31 GMT
- Article-I.D.: qiclab.1992Dec18.220231.18012
- References: <1g61hhINNhlb@iskut.ucs.ubc.ca>
- Reply-To: Leonard.Erickson@f51.n105.z1.fidonet.org
- Organization: SCN Research/Qic Laboratories of Tigard, Oregon.
- Lines: 33
-
- andy@orchid.bdc.ubc.ca (Andrew Dwelly) writes:
-
- >I'm having a really strange problem with a PC with sysmptoms
- >sufficiently bizarre that I'm posting this in the hope that it
- >might jog someones memory. The PC in question is an AE 386 running
- >Dos 5.0
-
- >The symptoms were that the system hung during a printscreen,
- >and then consistently hung during rebooting. I narrowed down the
- >boot problem to the DEVICE=\dos\ansi.sys line in confiig.sys. Remming
- >this out allows a reboot to complete.
-
- >After the reboot, any substantial program (Word, gauss, nfsrun) will
- >hang/whilst constantly printing out the screen to the printer - like
- >a stuck print screen key.
-
- First of all, you have to understand that the folks at IBM who designed
- the PC did a *major* no-no. They used interrupts that Intel had listed
- as "reserved for future use". One of them is INT 5 which they assigned
- to "print screen". This is used in 286 and later processors to signal
- an error condition (I forget which).
-
- So if your BIOS is a bit lame, anything that causes the CPU to have that
- error condition will cause a succesion of print screens! I've seen it on
- earely 286 machines many a time and it occasionally happens on even newer
- machines (there's only so much the BIOS can do to attempt to determine
- whether the INT 5 is an error condition or a legit print scrteen request.
-
- --
- Leonard Erickson leonard@qiclab.scn.rain.com
- CIS: [70465,203] 70465.203@compuserve.com
- FIDO: 1:105/51 Leonard.Erickson@f51.n105.z1.fidonet.org
- (The CIS & Fido addresses are preferred)
-