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    SubjectRe: PNP BIOS and parport_pc - dma found but not used
    Hello, Alan!

    > > The setting is BIOS is to use irq 7 and dma 3. I normally use "options
    > > parport_pc io=0x378 irq=7 dma=3" in /etc/modules.conf, but this time I
    > > commented them out hoping that the driver will ask BIOS.
    > >
    > > PnPBIOS: Parport found PNPBIOS PNP0401 at io=0378,0778 irq=7 dma=-1
    >
    > Do you have it set in the BIOS itself to use DMA mode and to use DMA 3. The
    > PnPBIOS should be reflecting your BIOS choices if I understand rightly

    Yes, it is set in BIOS to use ECP, EPP, IRQ 7 and DMA 3.

    There is another interesting line in the log that you didn't quote. The
    driver actually knows about DMA 3:

    0x378: ECP settings irq=7 dma=3

    Just in case, that board is Asus P5A-B with the latest BIOS:
    P5A-B BIOS ver. 1010, 05/31/2000

    For comparison, I took a board with VIA chipset and PhoenixBIOS 4.0
    Release 6.0, and it works properly with another 2.4.3-ac9 kernel:

    Winbond Super-IO detection, now testing ports 3F0,370,250,4E,2E ...
    SMSC Super-IO detection, now testing Ports 2F0, 370 ...
    PnPBIOS: Parport found PNPBIOS PNP0401 at io=0378,0778 irq=7 dma=3
    0x378: FIFO is 16 bytes
    0x378: writeIntrThreshold is 8
    0x378: readIntrThreshold is 8
    0x378: PWord is 8 bits
    0x378: Interrupts are ISA-Pulses
    0x378: ECP port cfgA=0x10 cfgB=0x4b
    0x378: ECP settings irq=7 dma=3
    parport0: PC-style at 0x378 (0x778), irq 7, dma 3
    [PCSPP,TRISTATE,COMPAT,ECP,DMA]
    parport0: cpp_daisy: aa5500ff(38)
    parport0: assign_addrs: aa5500ff(38)
    parport0: cpp_daisy: aa5500ff(38)
    parport0: assign_addrs: aa5500ff(38)

    --
    Regards,
    Pavel Roskin

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