Re: [PARPORT] DMA in ECP and EPP mode

From: Tim Waugh (
Date: Sat Apr 21 2001 - 05:02:16 EDT

  • Next message: "[PARPORT] EPP emulation"

    On Fri, Apr 20, 2001 at 05:47:24PM -0400, wrote:

    > ECP is much easier to implement with firmware on a microcontroller than is
    > EPP. The ECP timing requirements are much more tolerant of delays. Thus
    > the Linux driver is able to offer a software emulation of ECP, while it
    > cannot emulate EPP in software.

    [Er, actually, it tries. Take a look in ieee1284_ops.c.]


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