Re: [PARPORT] ECP mode transfers in 2.4.x kernels

From: Dave Strauss (
Date: Fri Sep 07 2001 - 15:06:50 EDT

  • Next message: Dave Strauss: "Re: [PARPORT] ECP mode transfers in 2.4.x kernels"

    On Fri, 07 Sep 2001 19:49:42 +0100, Philip Blundell <> wrote:
    > [ ... ]
    > always 35 seconds long then it seems unlikely that it's caused by a
    > byte being read in unexpectedly.
    > Do you know what chip your parallel port uses?
    > If you have any way to find out, it would be useful to know exactly what the
    > bad data the printer is seeing is -- whether it's a data byte being
    > duplicated, or random garbage being inserted in the middle.
    > p.
    dmesg output when parport loads is below.

    I'm working on getting the data the printer sees when there's an error.

    -- Dave Strauss

    Winbond Super-IO detection, now testing ports 3F0,370,250,4E,2E ...
    Winbond chip at EFER=0x2e key=0x87 devid=52 devrev=17 oldid=ff
    Winbond chip type 83627
    Winbond LPT Config: cr_30=01 60,61=0378 70=07 74=03, f0=3a
    Winbond LPT Config: active=yes, io=0x0378 irq=7, dma=3
    Winbond LPT Config: irqtype=pulsed low, high-Z, ECP fifo threshold=7
    Winbond LPT Config: Port mode=ECP
    SMSC Super-IO detection, now testing Ports 2F0, 370 ...
    0x378: FIFO is 16 bytes
    0x378: writeIntrThreshold is 9
    0x378: readIntrThreshold is 9
    0x378: PWord is 8 bits
    0x378: Interrupts are ISA-Pulses
    0x378: ECP port cfgA=0x10 cfgB=0x48
    0x378: ECP settings irq=7 dma=<none or set by other means>
    parport0: PC-style at 0x378 (0x778), irq 7, dma 3 [PCSPP,TRISTATE,COMPAT,EPP,ECP,DMA]

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