Re: DOS Newline Character

From: Lew Pitcher (Lew.Pitcher_at_td.com)
Date: 11/23/04

  • Next message: Kyuso Cahi: "Re: Fedora FC3 Sucks!" 
    Date: Tue, 23 Nov 2004 14:02:31 -0500

    -----BEGIN PGP SIGNED MESSAGE-----
    Hash: SHA1

    Roger Leigh wrote:
    [snip]
    > Summary: CR/LF or CR or LF (or whatever your system uses) are merely
    > line-end markers. They don't directly correspond to any mechanical
    > operations, which are entirely hardware-dependent.

    Funny, the ECMA and ISO standards and my old ASR33 teletypewriter would
    disagree with you on this.

    To my TTY, a 0x0d (ASCII Carriage Return) retuned the print head to the
    left margin, and a 0x0a (ASCII Line Feed) revolved the platen to advance
    the paper by exactly one line.

    To ECMA, Carriage return "causes the active presentation position to be
    moved to the line home position of the same line in the presentation
    component", and Line Feed "LF causes the active presentation position to
    be moved to the corresponding character position of the following line
    in the presentation component." The ISO definition is the same.

    Your ESC/P printer seems to act otherwise, although I believe (because
    of my own use of an ESC/P printer) that you are incorrect in your
    assertions about the ESC/P interpretation of the characters. Certainly,
    on my Epson LQ-570 printer, with the "CR/LF" switch set to require both
    carriage returns and line feeds, a 0x0d causes printing to resume at the
    left margin of the current line, and 0x0a causes printing to resume at
    the current column of the next line.

    - --

    Lew Pitcher, IT Consultant, Enterprise Data Systems
    Enterprise Technology Solutions, TD Bank Financial Group

    (Opinions expressed here are my own, not my employer's)
    -----BEGIN PGP SIGNATURE-----
    Version: GnuPG v1.2.4 (MingW32)

    iD8DBQFBo4lFagVFX4UWr64RApNUAKDs1YdoaqQ8VC+pJVDMIL7jC/FIqACeLj7Q
    DpeMHmi5BI0h3/U/E7AD18Q=
    =ld8W
    -----END PGP SIGNATURE-----

  • Next message: Kyuso Cahi: "Re: Fedora FC3 Sucks!"