[lkml]   [2000]   [Aug]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    SubjectRe: [patch] DTR/DSR hardware handshake support for 2.0/2.2/2.4
    Followup to:  <>
    By author: "Theodore Ts'o" <>
    In newsgroup:
    > Date: Tue, 01 Aug 2000 18:35:22 +0200
    > From: Martin Schenk <>
    > As I needed support for DTR/DSR hardware handshake to communicate with
    > a serial printer (and the "wire RTS/CTS to DTR/DSR" tip from the
    > serial-HOWTO works fine for a demo, but is not applicable for a few
    > thousand POS terminals *gg*), I implemented this functionality.
    > Yilch. This is specialized enough that I'd much rather this *not* go
    > into the kernel. Next thing we know, someone will want a DTR/CD
    > handshaking mechanism, etc.,etc.
    > This should probably be a private kernel patch, or (much more strongly
    > suggested) that you just get specially wired RS-232 cables. This is in
    > fact a very standard thing to do, and you can order cables from Black
    > Box or some other company specializing selling cables which connect
    > crufty legacy hardware.

    DTR/DSR is the most common handshake mechanism for RS-232-B (as
    opposed to RS-232-C and RS-232-D) devices. This feature has been
    requested on and off for the last five years. I think it's


    <> at work, <> in private!
    "Unix gives you enough rope to shoot yourself in the foot."

    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to
    Please read the FAQ at

     \ /
      Last update: 2005-03-22 13:57    [W:0.021 / U:11.356 seconds]
    ©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site