Xref: utzoo comp.sys.ibm.pc:32603 comp.periphs:1996
Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!csd4.milw.wisc.edu!bionet!apple!sun-barr!decwrl!shelby!lindy!ralerche
From: ralerche@lindy.Stanford.EDU (Robert A. Lerche)
Newsgroups: comp.sys.ibm.pc,comp.periphs
Subject: Re: Dot-matrix Graphics on Various Printers
Keywords: dot-matrix graphics, NEC Pinwriter, Diconix, Epson, IBM QuietWriter
Message-ID: <4161@lindy.Stanford.EDU>
Date: 3 Aug 89 16:03:56 GMT
References: <13208@bloom-beacon.MIT.EDU> <2328@hp-sdd.hp.com>
Sender: ralerche@lindy.Stanford.EDU (Robert A. Lerche)
Reply-To: ralerche@lindy.Stanford.EDU (Robert A. Lerche)
Distribution: usa
Organization: Research Libraries Group
Lines: 4

If you want to write undisturbed binary to the PRN device from a program
(as opposed to copying a file with "/b"), you have to issue the set device
data IOCTL call specifying "raw" mode. (DOS function 4401H, with bit 20H
on in DL).  Then DOS will allow ctrl-Z's to pass through.