This article was posted to the Usenet group alt.hackers in
1995; any technical information is probably outdated.
Parent
Re: A useful .COM proggy:
Article: 8650 of alt.hackers From: mjarvis@qns2.qns.com (Michael Jarvis) Newsgroups: alt.hackers Subject: Re: A useful .COM proggy: Date: 20 Sep 1995 23:55:43 -0500 Organization: Questar Network Services Lines: 45 Approved: foo@bar.com Message-ID: 43qr8f$q4v@qns2.qns.com X-Newsreader: TIN [version 1.2 PL2] Status: RO
David Hedley (David Hedley (hedley@inferno.cs.bris.ac.uk)) wrote:
Well, if we're going to do SIMPLE com files, here's one. It just sends a
formfeed to lpt1. It's useful if you do a "type foo.txt > lpt1"
and your
printer doesn't automagically send a formfeed.
It's only 17 bytes:
begin 755 ff.com
1LP2Q`;H0`;1`S2&X`$S-(0S]
`
end
Heck, I'll even include the TASM source:
----CUT HERE----Cut Here----cut here----CUT HERE----Cut Here----cut here----
; ff.com
title 'Form Feed'
.model TINY
.data
FormFeed db 12
.code
org 100h
Start:
mov bl, 04h ; We're going to output to file handle 4,
; which is the standard printer (PRN)
mov cl, 01h ; We're going to output one byte.
lea dx, FormFeed ; Load DX with the offset of the ASCII 12
mov ah, 40h ; Using INT 21h service 40h
int 21h ; Execute!
mov ax, 4c00h ; End the program
int 21h
end Start
----CUT HERE----Cut Here----cut here----CUT HERE----Cut Here----cut here----
--
Michael Jarvis | Finger for PGP Public key | QNSnet Technical Support
mjarvis@qns.com | http://www.qns.com/~mjarvis | Questar Network Services
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