[lkml]   [2005]   [Nov]   [26]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    SubjectRe: Paused I/O versus regular I/O
    Jean Delvare <> wrote:

    > Could anyone tell me what the difference is between "paused" I/O
    > (inb_p, oub_p and friends) and regular I/O (inb, oub and friends)? I
    > understand that the former includes some delays here and there, but how
    > do I know when to use the paused variant, and when the non-paused
    > variant is OK?

    AFAIK, some old hardware needs it. The original ISA bus speed was 4.77 MHz,
    and AT changed it to 8 MHz. Some chips needed extra delays to compensate,
    and those chips stayed around for a long time.

    Ich danke GMX dafür, die Verwendung meiner Adressen mittels per SPF
    verbreiteten Lügen zu sabotieren.
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to
    More majordomo info at
    Please read the FAQ at

     \ /
      Last update: 2005-11-27 02:09    [W:0.051 / U:4.312 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site