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From: ts@uwasa.fi (Timo Salmi LASK)
Newsgroups: comp.sys.ibm.pc.misc,aus.computers.ibm-pc,comp.os.msdos.programmer,comp.lang.prolog
Subject: Re: Summary Printer check - BIOS/DOS - various languages
Keywords: Printer, BIOS, DOS, C, Prolog (Pascal)
Message-ID: <1990Aug22.120247.17070@uwasa.fi>
Date: 22 Aug 90 12:02:47 GMT
References: <2102@trlluna.trl.oz>
Organization: University of Vaasa
Lines: 18

In article <2102@trlluna.trl.oz> pcampb@shiva.trl.oz (Peter Campbell) writes:
>
>Thanks to all who sent answers re checking if printers are connected to
>a machine.  All answers unfortunately fell into the category of BIOS
>functions, but I finally managed to get a hold of the MS-DOS
>encyclopedia and managed to work out the way to do it in DOS.

The list misses one of the simplest and most effective of the
methods, that testing the IOResult of an empty write to printer in
Turbo Pascal.  If the printer default timeout is changed for the
duration of the test, the test can be made very fast.  The
facilities for this are included in /pc/ts/tspas22.arc available by
anonymous ftp from chyde.uwasa.fi. 

...................................................................
Prof. Timo Salmi        (Moderating at anon. ftp site 128.214.12.3)
School of Business Studies, University of Vaasa, SF-65101, Finland
Internet: ts@chyde.uwasa.fi Funet: gado::salmi Bitnet: salmi@finfun