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From: paul@slhisc.uucp (Paul Tam)
Newsgroups: comp.os.msdos.programmer
Subject: <None>
Message-ID: <1990Oct1.142840.10474@slhisc.uucp>
Date: 1 Oct 90 14:28:40 GMT
Organization: Shearson Lehman Brothers, Inc. (ISC)
Lines: 25

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Sender: Paul Tam 
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Organization: Shearson Lehman Brother, Inc.
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I have a question of how to check the status of a parallel 
printer. In my application, I used ROM-BIOS printer service
which is int 23 (hex 17) and the service number is 2 which 
is to get printer status. I make use of the 6 bit (Acknowledgment
from printer bit) to determine if the printer is on-line or 
off-line. However this method doesn't seem to be working because
this Acknowlegment bit is always off even when the printer is 
on line. 

Am I using the correct way to check printer status ? Did I misunderstand
the meaning of this Acknowledgment ? Is there any better way to 
check the printer status. 


My compiler is MS C 5.1. and hope someone out there can help me with
this